dlsch_demodulation.c 180 KB
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/*******************************************************************************
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    OpenAirInterface
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    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
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   see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
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  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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/*! \file PHY/LTE_TRANSPORT/dlsch_demodulation.c
 * \brief Top-level routines for demodulating the PDSCH physical channel from 36-211, V8.6 2009-03
 * \author R. Knopp, F. Kaltenberger,A. Bhamri, S. Aubert
 * \date 2011
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 * \version 0.1
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 * \company Eurecom
 * \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr,ankit.bhamri@eurecom.fr,sebastien.aubert@eurecom.fr
 * \note
 * \warning
 */

#include "PHY/defs.h"
#include "PHY/extern.h"
#include "defs.h"
#include "extern.h"
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#include "PHY/sse_intrin.h"
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#ifndef USER_MODE
#define NOCYGWIN_STATIC static
#else
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#define NOCYGWIN_STATIC
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#endif

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//#undef LOG_D
//#define LOG_D LOG_I

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//#define DEBUG_PHY 1
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//#define DEBUG_DLSCH_DEMOD 1
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int avg[4]; 
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int avg_0[4];
int avg_1[4];
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// [MCS][i_mod (0,1,2) = (2,4,6)]
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unsigned char offset_mumimo_llr_drange_fix=0;
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uint8_t interf_unaw_shift0=0;
uint8_t interf_unaw_shift1=0;
uint8_t interf_unaw_shift=0;
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//inferference-free case
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unsigned char interf_unaw_shift_tm4_mcs[29]={5, 3, 4, 3, 3, 2, 1, 1, 2, 0, 1, 1, 1, 1, 0, 0, 
					     1, 1, 1, 1, 0, 2, 1, 0, 1, 0, 1, 0, 0} ;
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unsigned char interf_unaw_shift_tm1_mcs[29]={5, 5, 4, 3, 3, 3, 2, 2, 4, 4, 2, 3, 3, 3, 1, 1, 
					     0, 1, 1, 2, 5, 4, 4, 6, 5, 1, 0, 5, 6} ; // mcs 21, 26, 28 seem to be errorneous
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/*
//original values from sebastion + same hand tuning
unsigned char offset_mumimo_llr_drange[29][3]={{8,8,8},{7,7,7},{7,7,7},{7,7,7},{6,6,6},{6,6,6},{6,6,6},{5,5,5},{4,4,4},{1,2,4}, // QPSK
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{5,5,4},{5,5,5},{5,5,5},{3,3,3},{2,2,2},{2,2,2},{2,2,2}, // 16-QAM
{2,2,1},{3,3,3},{3,3,3},{3,3,1},{2,2,2},{2,2,2},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0},{0,0,0}}; //64-QAM
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*/
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 /*
 //first optimization try
 unsigned char offset_mumimo_llr_drange[29][3]={{7, 8, 7},{6, 6, 7},{6, 6, 7},{6, 6, 6},{5, 6, 6},{5, 5, 6},{5, 5, 6},{4, 5, 4},{4, 3, 4},{3, 2, 2},{6, 5, 5},{5, 4, 4},{5, 5, 4},{3, 3, 2},{2, 2, 1},{2, 1, 1},{2, 2, 2},{3, 3, 3},{3, 3, 2},{3, 3, 2},{3, 2, 1},{2, 2, 2},{2, 2, 2},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0}};
 */
 //second optimization try
 /*
   unsigned char offset_mumimo_llr_drange[29][3]={{5, 8, 7},{4, 6, 8},{3, 6, 7},{7, 7, 6},{4, 7, 8},{4, 7, 4},{6, 6, 6},{3, 6, 6},{3, 6, 6},{1, 3, 4},{1, 1, 0},{3, 3, 2},{3, 4, 1},{4, 0, 1},{4, 2, 2},{3, 1, 2},{2, 1, 0},{2, 1, 1},{1, 0, 1},{1, 0, 1},{0, 0, 0},{1, 0, 0},{0, 0, 0},{0, 1, 0},{1, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0}};  w
 */
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unsigned char offset_mumimo_llr_drange[29][3]= {{0, 6, 5},{0, 4, 5},{0, 4, 5},{0, 5, 4},{0, 5, 6},{0, 5, 3},{0, 4, 4},{0, 4, 4},{0, 3, 3},{0, 1, 2},{1, 1, 0},{1, 3, 2},{3, 4, 1},{2, 0, 0},{2, 2, 2},{1, 1, 1},{2, 1, 0},{2, 1, 1},{1, 0, 1},{1, 0, 1},{0, 0, 0},{1, 0, 0},{0, 0, 0},{0, 1, 0},{1, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0},{0, 0, 0}};
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extern void print_shorts(char *s,int16_t *x);
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int rx_pdsch(PHY_VARS_UE *phy_vars_ue,
             PDSCH_t type,
             unsigned char eNB_id,
             unsigned char eNB_id_i, //if this == phy_vars_ue->n_connected_eNB, we assume MU interference
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             uint8_t subframe,
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             unsigned char symbol,
             unsigned char first_symbol_flag,
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             RX_type_t rx_type,
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             unsigned char i_mod,
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             unsigned char harq_pid)
{

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  LTE_UE_COMMON *lte_ue_common_vars  = &phy_vars_ue->lte_ue_common_vars;
  LTE_UE_PDSCH **lte_ue_pdsch_vars;
  LTE_DL_FRAME_PARMS *frame_parms    = &phy_vars_ue->lte_frame_parms;
  PHY_MEASUREMENTS *phy_measurements = &phy_vars_ue->PHY_measurements;
  LTE_UE_DLSCH_t   **dlsch_ue;

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  unsigned char aatx,aarx;    
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  unsigned short nb_rb, round;
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  int avgs, rb;  
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 LTE_DL_UE_HARQ_t *dlsch0_harq,*dlsch1_harq = 0;
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  uint32_t *rballoc;
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  int32_t **rxdataF_comp_ptr;
  int32_t **dl_ch_mag_ptr;

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  switch (type) {
  case SI_PDSCH:
    lte_ue_pdsch_vars = &phy_vars_ue->lte_ue_pdsch_vars_SI[eNB_id];
    dlsch_ue          = &phy_vars_ue->dlsch_ue_SI[eNB_id];
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    dlsch0_harq       = dlsch_ue[0]->harq_processes[harq_pid];
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    break;
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  case RA_PDSCH:
    lte_ue_pdsch_vars = &phy_vars_ue->lte_ue_pdsch_vars_ra[eNB_id];
    dlsch_ue          = &phy_vars_ue->dlsch_ue_ra[eNB_id];
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    dlsch0_harq       = dlsch_ue[0]->harq_processes[harq_pid];
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    break;
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  case PDSCH:
    lte_ue_pdsch_vars = &phy_vars_ue->lte_ue_pdsch_vars[eNB_id];
    dlsch_ue          = phy_vars_ue->dlsch_ue[eNB_id];
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    dlsch0_harq       = dlsch_ue[0]->harq_processes[harq_pid];
    dlsch1_harq       = dlsch_ue[1]->harq_processes[harq_pid];
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    break;

  default:
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    LOG_E(PHY,"[UE %d][FATAL] Frame %d subframe %d: Unknown PDSCH format %d\n",phy_vars_ue->frame_rx,subframe,type);
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    return(-1);
    break;
  }
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  DevAssert(dlsch0_harq);
  round = dlsch0_harq->round;
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  if (eNB_id > 2) {
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    LOG_W(PHY,"dlsch_demodulation.c: Illegal eNB_id %d\n",eNB_id);
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    return(-1);
  }
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  if (!lte_ue_common_vars) {
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    LOG_W(PHY,"dlsch_demodulation.c: Null lte_ue_common_vars\n");
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    return(-1);
  }

  if (!dlsch_ue[0]) {
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    LOG_W(PHY,"dlsch_demodulation.c: Null dlsch_ue pointer\n");
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    return(-1);
  }

  if (!lte_ue_pdsch_vars) {
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    LOG_W(PHY,"dlsch_demodulation.c: Null lte_ue_pdsch_vars pointer\n");
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    return(-1);
  }
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  if (!frame_parms) {
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    LOG_W(PHY,"dlsch_demodulation.c: Null lte_frame_parms\n");
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    return(-1);
  }
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  if (((frame_parms->Ncp == NORMAL) && (symbol>=7)) ||
      ((frame_parms->Ncp == EXTENDED) && (symbol>=6)))
    rballoc = dlsch0_harq->rb_alloc_odd;
  else
    rballoc = dlsch0_harq->rb_alloc_even;
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  if (dlsch0_harq->mimo_mode>DUALSTREAM_PUSCH_PRECODING) {
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    LOG_E(PHY,"This transmission mode is not yet supported!\n");
    return(-1);
  }
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  if ((dlsch0_harq->mimo_mode==LARGE_CDD) || ((dlsch0_harq->mimo_mode>=DUALSTREAM_UNIFORM_PRECODING1) && (dlsch0_harq->mimo_mode<=DUALSTREAM_PUSCH_PRECODING)))  {
    DevAssert(dlsch1_harq);
    if (eNB_id!=eNB_id_i) {
      LOG_E(PHY,"TM3/TM4 requires to set eNB_id==eNB_id_i!\n");
      return(-1);
    }
  }

  //printf("rx_pdsch: harq_pid=%d, round=%d\n",harq_pid,round);

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  if (frame_parms->nb_antennas_tx_eNB>1) {
    nb_rb = dlsch_extract_rbs_dual(lte_ue_common_vars->rxdataF,
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                                   lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                   lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
                                   lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                   dlsch0_harq->pmi_alloc,
                                   lte_ue_pdsch_vars[eNB_id]->pmi_ext,
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                                   rballoc,
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                                   symbol,
                                   subframe,
                                   phy_vars_ue->high_speed_flag,
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                                   frame_parms,
				   dlsch0_harq->mimo_mode);
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//#ifdef DEBUG_DLSCH_MOD
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    /*   printf("dlsch: using pmi %lx, rb_alloc %x, pmi_ext ",pmi2hex_2Ar1(dlsch0_harq->pmi_alloc),*rballoc);
       for (rb=0;rb<nb_rb;rb++)
	  printf("%d",lte_ue_pdsch_vars[eNB_id]->pmi_ext[rb]);
       printf("\n");*/
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//#endif
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   if (rx_type==rx_IC_single_stream) {
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      if (eNB_id_i<phy_vars_ue->n_connected_eNB) // we are in TM5
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       nb_rb = dlsch_extract_rbs_dual(lte_ue_common_vars->rxdataF,
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                                       lte_ue_common_vars->dl_ch_estimates[eNB_id_i],
                                       lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                       lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                       dlsch0_harq->pmi_alloc,
                                       lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
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                                       rballoc,
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                                       symbol,
                                       subframe,
                                       phy_vars_ue->high_speed_flag,
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                                       frame_parms,
				       dlsch0_harq->mimo_mode);
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     else 
       nb_rb = dlsch_extract_rbs_dual(lte_ue_common_vars->rxdataF,
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                                       lte_ue_common_vars->dl_ch_estimates[eNB_id],
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                                       lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                       lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
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                                       dlsch0_harq->pmi_alloc,
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                                       lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
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                                       rballoc,
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                                       symbol,
                                       subframe,
                                       phy_vars_ue->high_speed_flag,
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                                       frame_parms,
				       dlsch0_harq->mimo_mode);
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    }
  } // if n_tx>1
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  else {
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    nb_rb = dlsch_extract_rbs_single(lte_ue_common_vars->rxdataF,
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                                     lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                     lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
                                     lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                     dlsch0_harq->pmi_alloc,
                                     lte_ue_pdsch_vars[eNB_id]->pmi_ext,
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                                     rballoc,
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                                     symbol,
                                     subframe,
                                     phy_vars_ue->high_speed_flag,
                                     frame_parms);
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   if (rx_type==rx_IC_single_stream) {
     if (eNB_id_i<phy_vars_ue->n_connected_eNB)
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        nb_rb = dlsch_extract_rbs_single(lte_ue_common_vars->rxdataF,
                                         lte_ue_common_vars->dl_ch_estimates[eNB_id_i],
                                         lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                         lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,    
                                         dlsch0_harq->pmi_alloc,
                                         lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
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                                         rballoc,
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                                         symbol,
                                         subframe,
                                         phy_vars_ue->high_speed_flag,
                                         frame_parms);
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      else 
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        nb_rb = dlsch_extract_rbs_single(lte_ue_common_vars->rxdataF,
                                         lte_ue_common_vars->dl_ch_estimates[eNB_id],
                                         lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                         lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,    
                                         dlsch0_harq->pmi_alloc,
                                         lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
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                                         rballoc,
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                                         symbol,
                                         subframe,
                                         phy_vars_ue->high_speed_flag,
                                         frame_parms);
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    }
  } //else n_tx>1
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  //  printf("nb_rb = %d, eNB_id %d\n",nb_rb,eNB_id);
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  if (nb_rb==0) {
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    LOG_D(PHY,"dlsch_demodulation.c: nb_rb=0\n");
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    return(-1);
  }
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#ifdef DEBUG_PHY
    LOG_D(PHY,"[DLSCH] log2_maxh = %d (%d,%d)\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh,avg[0],avgs);
    LOG_D(PHY,"[DLSCH] mimo_mode = %d\n", dlsch0_harq->mimo_mode);
#endif

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  aatx = frame_parms->nb_antennas_tx_eNB;
  aarx = frame_parms->nb_antennas_rx;

  if (dlsch0_harq->mimo_mode<LARGE_CDD) {// SISO or ALAMOUTI
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      dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
			  frame_parms,
			  dlsch_ue,
			  symbol,
			  nb_rb);
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      if (first_symbol_flag==1) {
	dlsch_channel_level(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
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                        frame_parms,
                        avg,
                        symbol,
                        nb_rb);
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#ifdef DEBUG_PHY
    LOG_D(PHY,"[DLSCH] avg[0] %d\n",avg[0]);
#endif

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    avgs = 0;
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    for (aatx=0;aatx<frame_parms->nb_antennas_tx_eNB;aatx++)
      for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++)
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        avgs = cmax(avgs,avg[(aatx<<1)+aarx]);
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    //  avgs = cmax(avgs,avg[(aarx<<1)+aatx]);
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   lte_ue_pdsch_vars[eNB_id]->log2_maxh = (log2_approx(avgs)/2) + interf_unaw_shift_tm1_mcs[dlsch0_harq->mcs];
    
      }
    
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    	dlsch_channel_compensation(lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
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                               lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                               lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                               (aatx>1) ? lte_ue_pdsch_vars[eNB_id]->rho : NULL,
                               frame_parms,
                               symbol,
                               first_symbol_flag,
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                               dlsch0_harq->Qm,
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                               nb_rb,
                               lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                               phy_measurements); // log2_maxh+I0_shift
 /*
 if (symbol == 5) {
     write_output("rxF_comp_d.m","rxF_c_d",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
 } */
    if ((rx_type==rx_IC_single_stream) && 
        (eNB_id_i<phy_vars_ue->n_connected_eNB)) {
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	 dlsch_channel_compensation(lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
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                                 lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                 lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                                 lte_ue_pdsch_vars[eNB_id_i]->dl_ch_magb0,
                                 lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                                 (aatx>1) ? lte_ue_pdsch_vars[eNB_id_i]->rho : NULL,
                                 frame_parms,
                                 symbol,
                                 first_symbol_flag,
                                 i_mod,
                                 nb_rb,
                                 lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                                 phy_measurements); // log2_maxh+I0_shift
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#ifdef DEBUG_PHY
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      if (symbol == 5) {
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        write_output("rxF_comp_d.m","rxF_c_d",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
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        write_output("rxF_comp_i.m","rxF_c_i",&lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);     
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      }
#endif 
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     // compute correlation between signal and interference channels
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      dlsch_dual_stream_correlation(frame_parms,
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                                    symbol,
                                    nb_rb,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
                                    lte_ue_pdsch_vars[eNB_id]->log2_maxh);
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    }
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  }
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  else if ((dlsch0_harq->mimo_mode == LARGE_CDD) || 
           ((dlsch0_harq->mimo_mode >=DUALSTREAM_UNIFORM_PRECODING1) && 
            (dlsch0_harq->mimo_mode <=DUALSTREAM_PUSCH_PRECODING))){  // TM3 or TM4
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    //   LOG_I(PHY,"Running PDSCH RX for TM3\n");
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    if (frame_parms->nb_antennas_tx_eNB == 2) {
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	 // scaling interfering channel (following for TM56)
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	dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
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			    frame_parms,
			    dlsch_ue,
			    symbol,
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			    nb_rb);
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      if (first_symbol_flag==1) {
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        // effective channel of desired user is always stronger than interfering eff. channel
        dlsch_channel_level_TM34(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext, 
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                                 frame_parms,
				 lte_ue_pdsch_vars[eNB_id]->pmi_ext,
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                                 avg_0,
				 avg_1,
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				 symbol,
				 nb_rb,
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                                 dlsch0_harq->mimo_mode);
	    
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	if (rx_type>rx_standard) {
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	// Shifts are needed to avoid tails in SNR/BLER curves.
	// LUT will be introduced with mcs-dependent shift
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	avg_0[0] = (log2_approx(avg_0[0])/2) -13 + interf_unaw_shift;
	avg_1[0] = (log2_approx(avg_1[0])/2) -13 + interf_unaw_shift;
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	lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = cmax(avg_0[0],avg_1[0]);
	lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = cmax(avg_1[0],avg_1[0]);
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	//printf("TM4 I-A log2_maxh0 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh0);
	//printf("TM4 I-A log2_maxh1 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh1);
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	 }
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	else {
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	// Shifts are needed to avoid tails in SNR/BLER curves.
	// LUT will be introduced with mcs-dependent shift
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	avg_0[0] = (log2_approx(avg_0[0])/2) - 13 + interf_unaw_shift;
	avg_1[0] = (log2_approx(avg_1[0])/2) - 13 + interf_unaw_shift;
	lte_ue_pdsch_vars[eNB_id]->log2_maxh0 = cmax(avg_0[0],avg_1[0]);
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	lte_ue_pdsch_vars[eNB_id]->log2_maxh1 = cmax(avg_0[0],avg_1[0]);
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	//printf("TM4 I-UA log2_maxh0 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh0);
	//printf("TM4 I-UA log2_maxh1 = %d\n", lte_ue_pdsch_vars[eNB_id]->log2_maxh1);
        }
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      }
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      dlsch_channel_compensation_TM34(frame_parms, 
                                     lte_ue_pdsch_vars[eNB_id],
                                     phy_measurements, 
                                     eNB_id, 
                                     symbol, 
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                                     dlsch0_harq->Qm, 
                                     dlsch1_harq->Qm,
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                                     harq_pid,
                                     dlsch0_harq->round,
                                     dlsch0_harq->mimo_mode,
                                     nb_rb, 
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                                     lte_ue_pdsch_vars[eNB_id]->log2_maxh0,
				     lte_ue_pdsch_vars[eNB_id]->log2_maxh1); 
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   	/*   
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       if (symbol == 5) {
   
     write_output("rxF_comp_d00.m","rxF_c_d00",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);// should be QAM
     write_output("rxF_comp_d01.m","rxF_c_d01",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[1][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);//should be almost 0
     write_output("rxF_comp_d10.m","rxF_c_d10",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[harq_pid][round][0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);//should be almost 0
     write_output("rxF_comp_d11.m","rxF_c_d11",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[harq_pid][round][1][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);//should be QAM

   
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	}*/
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      // compute correlation between signal and interference channels (rho12 and rho21)
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	dlsch_dual_stream_correlation(frame_parms,
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                                    symbol,
                                    nb_rb,
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
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                                    &(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[2]),
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                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
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			   	    lte_ue_pdsch_vars[eNB_id]->log2_maxh0);
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	//printf("rho stream1 =%d\n", &lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round] );
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      //to be optimized (just take complex conjugate)
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      dlsch_dual_stream_correlation(frame_parms,
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                                    symbol,
                                    nb_rb,
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				    &(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[2]),
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                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
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				    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
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				    lte_ue_pdsch_vars[eNB_id]->log2_maxh1);
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    //  printf("rho stream2 =%d\n",&lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext );
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      //printf("TM3 log2_maxh : %d\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh);

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   }
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      else {
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     LOG_E(PHY, "only 2 tx antennas supported for TM3\n");
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      return(-1);
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    }
  }
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  else if (dlsch0_harq->mimo_mode<DUALSTREAM_UNIFORM_PRECODING1) {// single-layer precoding (TM5, TM6)
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   //    printf("Channel compensation for precoding\n");
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    if ((rx_type==rx_IC_single_stream) && (eNB_id_i==phy_vars_ue->n_connected_eNB) && (dlsch0_harq->dl_power_off==0)) {  // TM5 two-user
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      // Scale the channel estimates for interfering stream
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       dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                          frame_parms,
                          dlsch_ue,
                          symbol,
                          nb_rb); 
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      dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
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                          frame_parms,
                          dlsch_ue,
                          symbol,
                          nb_rb);     
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      /* compute new log2_maxh for effective channel */
      if (first_symbol_flag==1) {
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        // effective channel of desired user is always stronger than interfering eff. channel
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       dlsch_channel_level_TM56(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
				frame_parms,
				lte_ue_pdsch_vars[eNB_id]->pmi_ext,
				avg,
				symbol,
				nb_rb);
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        //    LOG_D(PHY,"llr_offset = %d\n",offset_mumimo_llr_drange[dlsch0_harq->mcs][(i_mod>>1)-1]);
        avg[0] = log2_approx(avg[0]) - 13 + offset_mumimo_llr_drange[dlsch0_harq->mcs][(i_mod>>1)-1];
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        lte_ue_pdsch_vars[eNB_id]->log2_maxh = cmax(avg[0],0);
        //printf("log1_maxh =%d\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh);
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      }
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      dlsch_channel_compensation_TM56(lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                                      lte_ue_pdsch_vars[eNB_id]->pmi_ext,
                                      frame_parms,
                                      phy_measurements,
                                      eNB_id,
                                      symbol,
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                                      dlsch0_harq->Qm,
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                                      nb_rb,
                                      lte_ue_pdsch_vars[eNB_id]->log2_maxh,
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                                      dlsch0_harq->dl_power_off);
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      // if interference source is MU interference, assume opposite precoder was used at eNB

      // calculate opposite PMI
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      for (rb=0; rb<nb_rb; rb++) {
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        switch(lte_ue_pdsch_vars[eNB_id]->pmi_ext[rb]) {
        case 0:
          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=1;
          break;
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       case 1:
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          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=0;
          break;
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       case 2:
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          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=3;
          break;
        case 3:
          lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]=2;
          break;
        }
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       //  if (rb==0)
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        //    printf("pmi %d, pmi_i %d\n",lte_ue_pdsch_vars[eNB_id]->pmi_ext[rb],lte_ue_pdsch_vars[eNB_id_i]->pmi_ext[rb]);

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      }
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      dlsch_channel_compensation_TM56(lte_ue_pdsch_vars[eNB_id_i]->rxdataF_ext,
                                      lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext,
                                      lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                                      lte_ue_pdsch_vars[eNB_id_i]->dl_ch_magb0,
                                      lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                                      lte_ue_pdsch_vars[eNB_id_i]->pmi_ext,
                                      frame_parms,
                                      phy_measurements,
                                      eNB_id_i,
                                      symbol,
                                      i_mod,
                                      nb_rb,
                                      lte_ue_pdsch_vars[eNB_id]->log2_maxh,
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                                      dlsch0_harq->dl_power_off);
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#ifdef DEBUG_PHY
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      if (symbol==5) {
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        write_output("rxF_comp_d.m","rxF_c_d",&lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
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       write_output("rxF_comp_i.m","rxF_c_i",&lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12],frame_parms->N_RB_DL*12,1,1);
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      }
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#endif
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      dlsch_dual_stream_correlation(frame_parms, 
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                                    symbol, 
                                    nb_rb, 
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext, 
                                    lte_ue_pdsch_vars[eNB_id_i]->dl_ch_estimates_ext, 
                                    lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round], 
                                    lte_ue_pdsch_vars[eNB_id]->log2_maxh);
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    } else if (dlsch0_harq->dl_power_off==1)  {
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        dlsch_scale_channel(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
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                          frame_parms,
                          dlsch_ue,
                          symbol,
                          nb_rb);     

      /* compute new log2_maxh for effective channel */
      if (first_symbol_flag==1) {

        // effective channel of desired user is always stronger than interfering eff. channel
       dlsch_channel_level_TM56(lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
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				frame_parms,
				lte_ue_pdsch_vars[eNB_id]->pmi_ext,
				avg,
				symbol,
				nb_rb);
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       avgs = 0;

    for (aatx=0;aatx<frame_parms->nb_antennas_tx_eNB;aatx++)
      for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++)
        avgs = cmax(avgs,avg[(aatx<<1)+aarx]);
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        //    LOG_D(PHY,"llr_offset = %d\n",offset_mumimo_llr_drange[dlsch0_harq->mcs][(i_mod>>1)-1]);
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        lte_ue_pdsch_vars[eNB_id]->log2_maxh = (log2_approx(avgs)/2) + interf_unaw_shift_tm1_mcs[dlsch0_harq->mcs];
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        lte_ue_pdsch_vars[eNB_id]->log2_maxh = cmax(avg[0],0);
	lte_ue_pdsch_vars[eNB_id]->log2_maxh++;
	
        //printf("log1_maxh =%d\n",lte_ue_pdsch_vars[eNB_id]->log2_maxh);
      }
      
      
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      dlsch_channel_compensation_TM56(lte_ue_pdsch_vars[eNB_id]->rxdataF_ext,
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                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                                      lte_ue_pdsch_vars[eNB_id]->pmi_ext,
                                      frame_parms,
                                      phy_measurements,
                                      eNB_id,
                                      symbol,
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                                      dlsch0_harq->Qm,
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                                      nb_rb,
                                      lte_ue_pdsch_vars[eNB_id]->log2_maxh,
                                      1);
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    }
  }

  //  printf("MRC\n");
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  if (frame_parms->nb_antennas_rx > 1) {
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    if ((dlsch0_harq->mimo_mode == LARGE_CDD) ||
        ((dlsch0_harq->mimo_mode >=DUALSTREAM_UNIFORM_PRECODING1) && 
         (dlsch0_harq->mimo_mode <=DUALSTREAM_PUSCH_PRECODING))){  // TM3 or TM4
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      if (frame_parms->nb_antennas_tx_eNB == 2) {
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	dlsch_detection_mrc_TM34(frame_parms, 
                                 lte_ue_pdsch_vars[eNB_id],
				 harq_pid,
                                 dlsch0_harq->round,
				 symbol,
				 nb_rb,
				 1);
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      }
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    } else {

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      dlsch_detection_mrc(frame_parms,
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                          lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                          lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0,
                          lte_ue_pdsch_vars[eNB_id]->rho,
                          lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
                          lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                          lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                          lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0,
                          lte_ue_pdsch_vars[eNB_id_i]->dl_ch_magb0,
                          symbol,
                          nb_rb,
                          rx_type==rx_IC_single_stream); 
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    }
  }
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  //  printf("Combining");
  if ((dlsch0_harq->mimo_mode == SISO) ||
      ((dlsch0_harq->mimo_mode >= UNIFORM_PRECODING11) &&
       (dlsch0_harq->mimo_mode <= PUSCH_PRECODING0))) {

    /*
      dlsch_siso(frame_parms,
      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp,
      lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp,
      symbol,
      nb_rb);
    */
  } else if (dlsch0_harq->mimo_mode == ALAMOUTI) {

    dlsch_alamouti(frame_parms,
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                   lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                   lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                   lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                   symbol,
                   nb_rb);
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  } 
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  //    printf("LLR");
  if ((dlsch0_harq->mimo_mode == LARGE_CDD) || 
      ((dlsch0_harq->mimo_mode >=DUALSTREAM_UNIFORM_PRECODING1) && 
       (dlsch0_harq->mimo_mode <=DUALSTREAM_PUSCH_PRECODING)))  {
    rxdataF_comp_ptr = lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[harq_pid][round];
    dl_ch_mag_ptr = lte_ue_pdsch_vars[eNB_id]->dl_ch_mag1;
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  }
  else {
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    rxdataF_comp_ptr = lte_ue_pdsch_vars[eNB_id_i]->rxdataF_comp0;
    dl_ch_mag_ptr = lte_ue_pdsch_vars[eNB_id_i]->dl_ch_mag0;
    //i_mod should have been passed as a parameter
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  }
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  switch (dlsch0_harq->Qm) {
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  case 2 : 
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    if (rx_type==rx_standard) {
        dlsch_qpsk_llr(frame_parms,
                       lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                       lte_ue_pdsch_vars[eNB_id]->llr[0],
                       symbol,first_symbol_flag,nb_rb,
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                       adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,2,subframe,symbol),
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                       lte_ue_pdsch_vars[eNB_id]->llr128);
    }
      else if ((rx_type==rx_IC_single_stream) || (rx_type==rx_IC_dual_stream)) {
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        if (dlsch1_harq->Qm == 2) {
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          dlsch_qpsk_qpsk_llr(frame_parms,
                              lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                              rxdataF_comp_ptr,
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                              lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
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                              lte_ue_pdsch_vars[eNB_id]->llr[0],
                              symbol,first_symbol_flag,nb_rb,
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                              adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,2,subframe,symbol),
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                              lte_ue_pdsch_vars[eNB_id]->llr128);
          if (rx_type==rx_IC_dual_stream) {
            dlsch_qpsk_qpsk_llr(frame_parms,
                                rxdataF_comp_ptr,
                                lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
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                                lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
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                                lte_ue_pdsch_vars[eNB_id]->llr[1],
                                symbol,first_symbol_flag,nb_rb,
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                                adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,2,subframe,symbol),
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                                lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
          }
        }
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        else if (dlsch1_harq->Qm == 4) { 
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          dlsch_qpsk_16qam_llr(frame_parms,
                               lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                               rxdataF_comp_ptr,//i
                               dl_ch_mag_ptr,//i
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
                               lte_ue_pdsch_vars[eNB_id]->llr[0],
                               symbol,first_symbol_flag,nb_rb,
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                               adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,2,subframe,symbol),
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                               lte_ue_pdsch_vars[eNB_id]->llr128);
          if (rx_type==rx_IC_dual_stream) {
            dlsch_16qam_qpsk_llr(frame_parms,
                                 rxdataF_comp_ptr,
                                 lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
                                 dl_ch_mag_ptr,
                                 lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
                                 lte_ue_pdsch_vars[eNB_id]->llr[1],
                                 symbol,first_symbol_flag,nb_rb,
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                                 adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,4,subframe,symbol),
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                                 lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
          }
        }
        else {
          dlsch_qpsk_64qam_llr(frame_parms,
                               lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                               rxdataF_comp_ptr,//i
                               dl_ch_mag_ptr,//i
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
                               lte_ue_pdsch_vars[eNB_id]->llr[0],
                               symbol,first_symbol_flag,nb_rb,
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                               adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,2,subframe,symbol),
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                               lte_ue_pdsch_vars[eNB_id]->llr128);
          if (rx_type==rx_IC_dual_stream) {
            dlsch_64qam_qpsk_llr(frame_parms,
                                 rxdataF_comp_ptr,
                                 lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
                                 dl_ch_mag_ptr,
                                 lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
                                 lte_ue_pdsch_vars[eNB_id]->llr[1],
                                 symbol,first_symbol_flag,nb_rb,
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                                 adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,6,subframe,symbol),
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                                 lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
          }
        }          
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      }
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    break;
  case 4 :
    if (rx_type==rx_standard) {
      dlsch_16qam_llr(frame_parms,
                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                      lte_ue_pdsch_vars[eNB_id]->llr[0],
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                      symbol,first_symbol_flag,nb_rb,
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                      adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,4,subframe,symbol),
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                      lte_ue_pdsch_vars[eNB_id]->llr128);
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    }
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    else if ((rx_type==rx_IC_single_stream) || (rx_type==rx_IC_dual_stream)) {
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      if (dlsch1_harq->Qm == 2) {
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        dlsch_16qam_qpsk_llr(frame_parms,
                             lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                             rxdataF_comp_ptr,//i
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                             lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
                             lte_ue_pdsch_vars[eNB_id]->llr[0],
                             symbol,first_symbol_flag,nb_rb,
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                             adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,4,subframe,symbol),
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                             lte_ue_pdsch_vars[eNB_id]->llr128);
        if (rx_type==rx_IC_dual_stream) {
          dlsch_qpsk_16qam_llr(frame_parms,
                               rxdataF_comp_ptr,
                               lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,//i
                               lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
                               lte_ue_pdsch_vars[eNB_id]->llr[1],
                               symbol,first_symbol_flag,nb_rb,
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                               adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,2,subframe,symbol),
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                               lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
        }
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      }
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      else if (dlsch1_harq->Qm == 4) {
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	dlsch_16qam_16qam_llr(frame_parms,
			      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
			      rxdataF_comp_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
			      dl_ch_mag_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
			      lte_ue_pdsch_vars[eNB_id]->llr[0],
			      symbol,first_symbol_flag,nb_rb,
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			      adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,4,subframe,symbol),
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			      lte_ue_pdsch_vars[eNB_id]->llr128);
	if (rx_type==rx_IC_dual_stream) {
	  dlsch_16qam_16qam_llr(frame_parms,
				rxdataF_comp_ptr,
				lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
				dl_ch_mag_ptr,
				lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,//i
				lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
				lte_ue_pdsch_vars[eNB_id]->llr[1],
				symbol,first_symbol_flag,nb_rb,
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				adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,4,subframe,symbol),
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				lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
	}
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      }
      else {
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	dlsch_16qam_64qam_llr(frame_parms,
			      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
			      rxdataF_comp_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
			      dl_ch_mag_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
			      lte_ue_pdsch_vars[eNB_id]->llr[0],
			      symbol,first_symbol_flag,nb_rb,
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			      adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,4,subframe,symbol),
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			      lte_ue_pdsch_vars[eNB_id]->llr128);
	if (rx_type==rx_IC_dual_stream) {
	  dlsch_64qam_16qam_llr(frame_parms,
				rxdataF_comp_ptr,
				lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
				dl_ch_mag_ptr,
				lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
				lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
				lte_ue_pdsch_vars[eNB_id]->llr[1],
				symbol,first_symbol_flag,nb_rb,
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				adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,6,subframe,symbol),
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				lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
	}
      }
    }
    break;
  case 6 :
    if (rx_type==rx_standard) {
      dlsch_64qam_llr(frame_parms,
                      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
                      lte_ue_pdsch_vars[eNB_id]->llr[0],
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0,
                      symbol,first_symbol_flag,nb_rb,
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                      adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,6,subframe,symbol),
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                      lte_ue_pdsch_vars[eNB_id]->llr128);
    }
    else if ((rx_type==rx_IC_single_stream) || (rx_type==rx_IC_dual_stream)) {
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      if (dlsch1_harq->Qm == 2) {              
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	dlsch_64qam_qpsk_llr(frame_parms,
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			     lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
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			     rxdataF_comp_ptr,//i
			     lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
			     lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
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			     lte_ue_pdsch_vars[eNB_id]->llr[0],
			     symbol,first_symbol_flag,nb_rb,
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			     adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,6,subframe,symbol),
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			     lte_ue_pdsch_vars[eNB_id]->llr128);
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	if (rx_type==rx_IC_dual_stream) {
	  dlsch_qpsk_64qam_llr(frame_parms,
			       rxdataF_comp_ptr,
			       lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
			       lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
			       lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
			       lte_ue_pdsch_vars[eNB_id]->llr[1],
			       symbol,first_symbol_flag,nb_rb,
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			       adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,2,subframe,symbol),
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			       lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
	}
      }
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      else if (dlsch1_harq->Qm == 4) {
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	dlsch_64qam_16qam_llr(frame_parms,
			      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
			      rxdataF_comp_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
			      dl_ch_mag_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
			      lte_ue_pdsch_vars[eNB_id]->llr[0],
			      symbol,first_symbol_flag,nb_rb,
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			      adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,6,subframe,symbol),
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			      lte_ue_pdsch_vars[eNB_id]->llr128);
	if (rx_type==rx_IC_dual_stream) {
	  dlsch_16qam_64qam_llr(frame_parms,
				rxdataF_comp_ptr,
				lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
				dl_ch_mag_ptr,
				lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,//i
				lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
				lte_ue_pdsch_vars[eNB_id]->llr[1],
				symbol,first_symbol_flag,nb_rb,
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				adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,4,subframe,symbol),
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				lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
	}
      }
      else {	  
	dlsch_64qam_64qam_llr(frame_parms,
			      lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,
			      rxdataF_comp_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,
			      dl_ch_mag_ptr,//i
			      lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[harq_pid][round],
			      lte_ue_pdsch_vars[eNB_id]->llr[0],
			      symbol,first_symbol_flag,nb_rb,
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			      adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,6,subframe,symbol),
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			      lte_ue_pdsch_vars[eNB_id]->llr128);
	if (rx_type==rx_IC_dual_stream) {
	  dlsch_64qam_64qam_llr(frame_parms,
				rxdataF_comp_ptr,
				lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0,//i
				dl_ch_mag_ptr,
				lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0,//i
				lte_ue_pdsch_vars[eNB_id]->dl_ch_rho2_ext,
				lte_ue_pdsch_vars[eNB_id]->llr[1],
				symbol,first_symbol_flag,nb_rb,
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				adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,6,subframe,symbol),
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				lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
	}
      }
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    }
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    break;
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  default:
    LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
    return(-1);
    break;
  }

  switch (get_Qm(dlsch1_harq->mcs)) {
  case 2 : 
    if (rx_type==rx_standard) {
        dlsch_qpsk_llr(frame_parms,
                       rxdataF_comp_ptr,
                       lte_ue_pdsch_vars[eNB_id]->llr[1],
                       symbol,first_symbol_flag,nb_rb,
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                       adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,2,subframe,symbol),
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                       lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
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    }
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    break;
  case 4:
    if (rx_type==rx_standard) {
      dlsch_16qam_llr(frame_parms,
                      rxdataF_comp_ptr,
                      lte_ue_pdsch_vars[eNB_id]->llr[1],
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag1,
                      symbol,first_symbol_flag,nb_rb,
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                      adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,4,subframe,symbol),
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                      lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
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    }
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    break;
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  case 6 :
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    if (rx_type==rx_standard) {
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      dlsch_64qam_llr(frame_parms,
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                      rxdataF_comp_ptr,
                      lte_ue_pdsch_vars[eNB_id]->llr[1],
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_mag1,
                      lte_ue_pdsch_vars[eNB_id]->dl_ch_magb1,
                      symbol,first_symbol_flag,nb_rb,
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                      adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,6,subframe,symbol),
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                      lte_ue_pdsch_vars[eNB_id]->llr128_2ndstream);
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  }

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    break;
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  default:
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    LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
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    return(-1);
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    break;
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  } 
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  return(0);    
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}

//==============================================================================================
// Pre-processing for LLR computation
//==============================================================================================

void dlsch_channel_compensation(int **rxdataF_ext,
                                int **dl_ch_estimates_ext,
                                int **dl_ch_mag,
                                int **dl_ch_magb,
                                int **rxdataF_comp,
                                int **rho,
                                LTE_DL_FRAME_PARMS *frame_parms,
                                unsigned char symbol,
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                                uint8_t first_symbol_flag,
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                                unsigned char mod_order,
                                unsigned short nb_rb,
                                unsigned char output_shift,
                                PHY_MEASUREMENTS *phy_measurements) {

  unsigned short rb;
  unsigned char aatx,aarx,symbol_mod,pilots=0;
  __m128i *dl_ch128,*dl_ch128_2,*dl_ch_mag128,*dl_ch_mag128b,*rxdataF128,*rxdataF_comp128,*rho128;
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  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp128,QAM_amp128b;
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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
      
    if (frame_parms->mode1_flag==1) // 10 out of 12 so don't reduce size    
      nb_rb=1+(5*nb_rb/6);
    else  
      pilots=1;    
  }

  for (aatx=0;aatx<frame_parms->nb_antennas_tx_eNB;aatx++) {
    if (mod_order == 4) {
      QAM_amp128 = _mm_set1_epi16(QAM16_n1);  // 2/sqrt(10)
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      QAM_amp128b = _mm_setzero_si128();
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    }    
    else if (mod_order == 6) {
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      QAM_amp128  = _mm_set1_epi16(QAM64_n1); 
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      QAM_amp128b = _mm_set1_epi16(QAM64_n2);
    }
    
    //    printf("comp: rxdataF_comp %p, symbol %d\n",rxdataF_comp[0],symbol);

    for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++) {

      dl_ch128          = (__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128      = (__m128i *)&dl_ch_mag[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128b     = (__m128i *)&dl_ch_magb[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF128        = (__m128i *)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128   = (__m128i *)&rxdataF_comp[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];


      for (rb=0;rb<nb_rb;rb++) {
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        if (mod_order>2) {  
          // get channel amplitude if not QPSK
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          mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128[0]);
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
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          mmtmpD1 = _mm_madd_epi16(dl_ch128[1],dl_ch128[1]);
          mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
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          mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);
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          // store channel magnitude here in a new field of dlsch
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          dl_ch_mag128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
          dl_ch_mag128b[0] = dl_ch_mag128[0];
          dl_ch_mag128[0] = _mm_mulhi_epi16(dl_ch_mag128[0],QAM_amp128);
          dl_ch_mag128[0] = _mm_slli_epi16(dl_ch_mag128[0],1);
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          dl_ch_mag128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
          dl_ch_mag128b[1] = dl_ch_mag128[1];
          dl_ch_mag128[1] = _mm_mulhi_epi16(dl_ch_mag128[1],QAM_amp128);
          dl_ch_mag128[1] = _mm_slli_epi16(dl_ch_mag128[1],1);
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          if (pilots==0) {
            mmtmpD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128[2]);
            mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
            mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);
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            dl_ch_mag128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);
            dl_ch_mag128b[2] = dl_ch_mag128[2];
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            dl_ch_mag128[2] = _mm_mulhi_epi16(dl_ch_mag128[2],QAM_amp128);
            dl_ch_mag128[2] = _mm_slli_epi16(dl_ch_mag128[2],1);          
          }
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          dl_ch_mag128b[0] = _mm_mulhi_epi16(dl_ch_mag128b[0],QAM_amp128b);
          dl_ch_mag128b[0] = _mm_slli_epi16(dl_ch_mag128b[0],1);
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          dl_ch_mag128b[1] = _mm_mulhi_epi16(dl_ch_mag128b[1],QAM_amp128b);
          dl_ch_mag128b[1] = _mm_slli_epi16(dl_ch_mag128b[1],1);
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          if (pilots==0) {
            dl_ch_mag128b[2] = _mm_mulhi_epi16(dl_ch_mag128b[2],QAM_amp128b);
            dl_ch_mag128b[2] = _mm_slli_epi16(dl_ch_mag128b[2],1);        
          }
        }
        
        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);
        //      print_ints("re",&mmtmpD0);
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        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
        //      print_ints("im",&mmtmpD1);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[0]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        //      print_ints("re(shift)",&mmtmpD0);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        //      print_ints("im(shift)",&mmtmpD1);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
        //              print_ints("c0",&mmtmpD2);
        //      print_ints("c1",&mmtmpD3);
        rxdataF_comp128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //      print_shorts("rx:",rxdataF128);
        //      print_shorts("ch:",dl_ch128);
        //      print_shorts("pack:",rxdataF_comp128);
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[1],rxdataF128[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[1]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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        rxdataF_comp128[1] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //      print_shorts("rx:",rxdataF128+1);
        //      print_shorts("ch:",dl_ch128+1);
        //      print_shorts("pack:",rxdataF_comp128+1);        
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        if (pilots==0) {
          // multiply by conjugated channel
          mmtmpD0 = _mm_madd_epi16(dl_ch128[2],rxdataF128[2]);
          // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
          mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
          mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
          mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
          mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[2]);
          // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
          mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
          mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
          mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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          rxdataF_comp128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
          //    print_shorts("rx:",rxdataF128+2);
          //    print_shorts("ch:",dl_ch128+2);
          //            print_shorts("pack:",rxdataF_comp128+2);
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          dl_ch128+=3;
          dl_ch_mag128+=3;
          dl_ch_mag128b+=3;
          rxdataF128+=3;
          rxdataF_comp128+=3;
        }
        else { // we have a smaller PDSCH in symbols with pilots so skip last group of 4 REs and increment less
          dl_ch128+=2;
          dl_ch_mag128+=2;
          dl_ch_mag128b+=2;
          rxdataF128+=2;
          rxdataF_comp128+=2;
        }
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      }
    }
  }
  
  if (rho) {
      
      
    for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++) {
      rho128        = (__m128i *)&rho[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128      = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128_2    = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
          
      for (rb=0;rb<nb_rb;rb++) {
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128_2[0]);
        //      print_ints("re",&mmtmpD0);
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        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
        //      print_ints("im",&mmtmpD1);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128_2[0]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        //      print_ints("re(shift)",&mmtmpD0);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        //      print_ints("im(shift)",&mmtmpD1);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
        //              print_ints("c0",&mmtmpD2);
        //      print_ints("c1",&mmtmpD3);
        rho128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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        //print_shorts("rx:",dl_ch128_2);
        //print_shorts("ch:",dl_ch128);
        //print_shorts("pack:",rho128);
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128_2[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128_2[1]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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        rho128[1] =_mm_packs_epi32(mmtmpD2,mmtmpD3);
        //print_shorts("rx:",dl_ch128_2+1);
        //print_shorts("ch:",dl_ch128+1);
        //print_shorts("pack:",rho128+1);       
        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128_2[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128_2[2]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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        rho128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //print_shorts("rx:",dl_ch128_2+2);
        //print_shorts("ch:",dl_ch128+2);
        //print_shorts("pack:",rho128+2);
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        dl_ch128+=3;
        dl_ch128_2+=3;
        rho128+=3;
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      } 
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      if (first_symbol_flag==1) {
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        phy_measurements->rx_correlation[0][aarx] = signal_energy(&rho[aarx][symbol*frame_parms->N_RB_DL*12],rb*12);
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      }           
    }      
  }

  _mm_empty();
  _m_empty();
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}  
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#if defined(__x86_64__) || defined(__i386__)

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void prec2A_TM56_128(unsigned char pmi,__m128i *ch0,__m128i *ch1)
{
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  __m128i amp;
  amp = _mm_set1_epi16(ONE_OVER_SQRT2_Q15);

  switch (pmi) {
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  case 0 :   // +1 +1
    //    print_shorts("phase 0 :ch0",ch0);
    //    print_shorts("phase 0 :ch1",ch1);
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    ch0[0] = _mm_adds_epi16(ch0[0],ch1[0]);
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    break;
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  case 1 :   // +1 -1
    //    print_shorts("phase 1 :ch0",ch0);
    //    print_shorts("phase 1 :ch1",ch1);
    ch0[0] = _mm_subs_epi16(ch0[0],ch1[0]);
    //    print_shorts("phase 1 :ch0-ch1",ch0);
    break;
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  case 2 :   // +1 +j
    ch1[0] = _mm_sign_epi16(ch1[0],*(__m128i*)&conjugate[0]);
    ch1[0] = _mm_shufflelo_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch1[0] = _mm_shufflehi_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch0[0] = _mm_subs_epi16(ch0[0],ch1[0]);

    break;   // +1 -j
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  case 3 :
    ch1[0] = _mm_sign_epi16(ch1[0],*(__m128i*)&conjugate[0]);
    ch1[0] = _mm_shufflelo_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch1[0] = _mm_shufflehi_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch0[0] = _mm_adds_epi16(ch0[0],ch1[0]);
    break;
  }

  ch0[0] = _mm_mulhi_epi16(ch0[0],amp);
  ch0[0] = _mm_slli_epi16(ch0[0],1);
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  _mm_empty();
  _m_empty();
}
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#elif defined(__arm__)
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void prec2A_TM56_128(unsigned char pmi,__m128i *ch0,__m128i *ch1) {
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  __m128i amp;
  amp = _mm_set1_epi16(ONE_OVER_SQRT2_Q15);

  switch (pmi) {
        
  case 0 :   // +1 +1
    //    print_shorts("phase 0 :ch0",ch0);
    //    print_shorts("phase 0 :ch1",ch1);
    ch0[0] = _mm_adds_epi16(ch0[0],ch1[0]);   
    break;
  case 1 :   // +1 -1
    //    print_shorts("phase 1 :ch0",ch0);
    //    print_shorts("phase 1 :ch1",ch1);
    ch0[0] = _mm_subs_epi16(ch0[0],ch1[0]);
    //    print_shorts("phase 1 :ch0-ch1",ch0);
    break;
  case 2 :   // +1 +j
    ch1[0] = _mm_sign_epi16(ch1[0],*(__m128i*)&conjugate[0]);
    ch1[0] = _mm_shufflelo_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch1[0] = _mm_shufflehi_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch0[0] = _mm_subs_epi16(ch0[0],ch1[0]);
        
    break;   // +1 -j
  case 3 :
    ch1[0] = _mm_sign_epi16(ch1[0],*(__m128i*)&conjugate[0]);
    ch1[0] = _mm_shufflelo_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch1[0] = _mm_shufflehi_epi16(ch1[0],_MM_SHUFFLE(2,3,0,1));
    ch0[0] = _mm_adds_epi16(ch0[0],ch1[0]);
    break;
  }

  ch0[0] = _mm_mulhi_epi16(ch0[0],amp);
  ch0[0] = _mm_slli_epi16(ch0[0],1);
    
  _mm_empty();
  _m_empty();
}
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#endif
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// precoding is stream 0 .5(1,1)  .5(1,-1) .5(1,1)  .5(1,-1)
//              stream 1 .5(1,-1) .5(1,1)  .5(1,-1) .5(1,1)
// store "precoded" channel for stream 0 in ch0, stream 1 in ch1

short TM3_prec[8]__attribute__((aligned(16))) = {1,1,-1,-1,1,1,-1,-1} ;

void prec2A_TM3_128(__m128i *ch0,__m128i *ch1) {
  
  //  __m128i amp = _mm_set1_epi16(ONE_OVER_SQRT2_Q15);
  
  __m128i tmp0,tmp1;
  

  //  print_shorts("prec2A_TM3 ch0 (before):",ch0);
  //  print_shorts("prec2A_TM3 ch1 (before):",ch1);

  tmp0 = ch0[0];
  tmp1  = _mm_sign_epi16(ch1[0],((__m128i*)&TM3_prec)[0]);
  //  print_shorts("prec2A_TM3 ch1*s (mid):",(__m128i*)TM3_prec);

  ch0[0] = _mm_adds_epi16(ch0[0],tmp1);
  ch1[0] = _mm_subs_epi16(tmp0,tmp1);


  //  print_shorts("prec2A_TM3 ch0 (mid):",&tmp0);
  //  print_shorts("prec2A_TM3 ch1 (mid):",ch1);


  ch0[0] = _mm_srai_epi16(ch0[0],1);
  ch1[0] = _mm_srai_epi16(ch1[0],1);

  //  print_shorts("prec2A_TM3 ch0 (after):",ch0);
  //  print_shorts("prec2A_TM3 ch1 (after):",ch1);
    
  _mm_empty();
  _m_empty();
}

// pmi = 0 => stream 0 (1,1), stream 1 (1,-1)
// pmi = 1 => stream 0 (1,j), stream 2 (1,-j)

void prec2A_TM4_128(int pmi,__m128i *ch0,__m128i *ch1) {
  
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 // printf ("demod pmi=%d\n", pmi);
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  // __m128i amp;
  // amp = _mm_set1_epi16(ONE_OVER_SQRT2_Q15);
  __m128i tmp0,tmp1;
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  //print_shorts("prec2A_TM4 ch0 (before):",ch0);
  //print_shorts("prec2A_TM4 ch1 (before):",ch1);

  if (pmi == 0) { //[1 1;1 -1]
    tmp0 = ch0[0];
    tmp1 = ch1[0];
    ch0[0] = _mm_adds_epi16(tmp0,tmp1);
    ch1[0] = _mm_subs_epi16(tmp0,tmp1);
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  }
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  else { //ch0+j*ch1 ch0-j*ch1
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    tmp0 = ch0[0];
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    tmp1   = _mm_sign_epi16(ch1[0],*(__m128i*)&conjugate[0]);
    tmp1   = _mm_shufflelo_epi16(tmp1,_MM_SHUFFLE(2,3,0,1));
    tmp1   = _mm_shufflehi_epi16(tmp1,_MM_SHUFFLE(2,3,0,1));
    ch0[0] = _mm_subs_epi16(tmp0,tmp1);
    ch1[0] = _mm_adds_epi16(tmp0,tmp1);
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  }
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  //print_shorts("prec2A_TM4 ch0 (middle):",ch0);
  //print_shorts("prec2A_TM4 ch1 (middle):",ch1);

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  //ch0[0] = _mm_mulhi_epi16(ch0[0],amp);
  //ch0[0] = _mm_slli_epi16(ch0[0],1);
  //ch1[0] = _mm_mulhi_epi16(ch1[0],amp);
  //ch1[0] = _mm_slli_epi16(ch1[0],1);

  //print_shorts("prec2A_TM4 ch0 (end):",ch0);
  //print_shorts("prec2A_TM4 ch1 (end):",ch1);
  ch0[0] = _mm_srai_epi16(ch0[0],1); //divide by 2
  ch1[0] = _mm_srai_epi16(ch1[0],1); //divide by 2

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  _mm_empty();
  _m_empty();
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 // print_shorts("prec2A_TM4 ch0 (end):",ch0);
  //print_shorts("prec2A_TM4 ch1 (end):",ch1);
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}

void dlsch_channel_compensation_TM56(int **rxdataF_ext,
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                                     int **dl_ch_estimates_ext,
                                     int **dl_ch_mag,
                                     int **dl_ch_magb,
                                     int **rxdataF_comp,
                                     unsigned char *pmi_ext,
                                     LTE_DL_FRAME_PARMS *frame_parms,
                                     PHY_MEASUREMENTS *phy_measurements,
                                     int eNB_id,
                                     unsigned char symbol,
                                     unsigned char mod_order,
                                     unsigned short nb_rb,
                                     unsigned char output_shift,
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                                     unsigned char dl_power_off)
{

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#if defined(__x86_64__) || defined(__i386__)

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  unsigned short rb,Nre;
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  __m128i *dl_ch0_128,*dl_ch1_128,*dl_ch_mag128,*dl_ch_mag128b,*rxdataF128,*rxdataF_comp128;
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  unsigned char aarx=0,symbol_mod,pilots=0;
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  int precoded_signal_strength=0;
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  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp128,QAM_amp128b;
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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
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  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp)))
    pilots=1;

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  //printf("comp prec: symbol %d, pilots %d\n",symbol, pilots);

  if (mod_order == 4) {
    QAM_amp128 = _mm_set1_epi16(QAM16_n1);
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    QAM_amp128b = _mm_setzero_si128();
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  } else if (mod_order == 6) {
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    QAM_amp128  = _mm_set1_epi16(QAM64_n1);
    QAM_amp128b = _mm_set1_epi16(QAM64_n2);
  }
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  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {

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    dl_ch0_128          = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128          = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch_mag128      = (__m128i *)&dl_ch_mag[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch_mag128b     = (__m128i *)&dl_ch_magb[aarx][symbol*frame_parms->N_RB_DL*12];
    rxdataF128        = (__m128i *)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128   = (__m128i *)&rxdataF_comp[aarx][symbol*frame_parms->N_RB_DL*12];

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    for (rb=0; rb<nb_rb; rb++) {
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      // combine TX channels using precoder from pmi
#ifdef DEBUG_DLSCH_DEMOD
      printf("mode 6 prec: rb %d, pmi->%d\n",rb,pmi_ext[rb]);
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#endif
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      prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128[0],&dl_ch1_128[0]);
      prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128[1],&dl_ch1_128[1]);
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      if (pilots==0) {
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        prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128[2],&dl_ch1_128[2]); 
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      }

      if (mod_order>2) {  
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        // get channel amplitude if not QPSK
        
        mmtmpD0 = _mm_madd_epi16(dl_ch0_128[0],dl_ch0_128[0]);  
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
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        mmtmpD1 = _mm_madd_epi16(dl_ch0_128[1],dl_ch0_128[1]);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
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        mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);
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        dl_ch_mag128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
        dl_ch_mag128b[0] = dl_ch_mag128[0];
        dl_ch_mag128[0] = _mm_mulhi_epi16(dl_ch_mag128[0],QAM_amp128);
        dl_ch_mag128[0] = _mm_slli_epi16(dl_ch_mag128[0],1);
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        //print_shorts("dl_ch_mag128[0]=",&dl_ch_mag128[0]);
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        //print_shorts("dl_ch_mag128[0]=",&dl_ch_mag128[0]);

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        dl_ch_mag128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
        dl_ch_mag128b[1] = dl_ch_mag128[1];
        dl_ch_mag128[1] = _mm_mulhi_epi16(dl_ch_mag128[1],QAM_amp128);
        dl_ch_mag128[1] = _mm_slli_epi16(dl_ch_mag128[1],1);
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        if (pilots==0) {
          mmtmpD0 = _mm_madd_epi16(dl_ch0_128[2],dl_ch0_128[2]);
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
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          mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);
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          dl_ch_mag128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);
          dl_ch_mag128b[2] = dl_ch_mag128[2];
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          dl_ch_mag128[2] = _mm_mulhi_epi16(dl_ch_mag128[2],QAM_amp128);
          dl_ch_mag128[2] = _mm_slli_epi16(dl_ch_mag128[2],1);    
        }
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        dl_ch_mag128b[0] = _mm_mulhi_epi16(dl_ch_mag128b[0],QAM_amp128b);
        dl_ch_mag128b[0] = _mm_slli_epi16(dl_ch_mag128b[0],1);
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        //print_shorts("dl_ch_mag128b[0]=",&dl_ch_mag128b[0]);
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        dl_ch_mag128b[1] = _mm_mulhi_epi16(dl_ch_mag128b[1],QAM_amp128b);
        dl_ch_mag128b[1] = _mm_slli_epi16(dl_ch_mag128b[1],1);
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        if (pilots==0) {
          dl_ch_mag128b[2] = _mm_mulhi_epi16(dl_ch_mag128b[2],QAM_amp128b);
          dl_ch_mag128b[2] = _mm_slli_epi16(dl_ch_mag128b[2],1);          
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        }
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      }

      // MF multiply by conjugated channel
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      mmtmpD0 = _mm_madd_epi16(dl_ch0_128[0],rxdataF128[0]);
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      //        print_ints("re",&mmtmpD0);
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      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpD1 = _mm_shufflelo_epi16(dl_ch0_128[0],_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
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      //        print_ints("im",&mmtmpD1);
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      mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[0]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
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      //        print_ints("re(shift)",&mmtmpD0);
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      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
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      //        print_ints("im(shift)",&mmtmpD1);
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      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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      //        print_ints("c0",&mmtmpD2);
      //        print_ints("c1",&mmtmpD3);
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      rxdataF_comp128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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      //        print_shorts("rx:",rxdataF128);
      //        print_shorts("ch:",dl_ch128);
      //        print_shorts("pack:",rxdataF_comp128);
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      // multiply by conjugated channel
      mmtmpD0 = _mm_madd_epi16(dl_ch0_128[1],rxdataF128[1]);
      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpD1 = _mm_shufflelo_epi16(dl_ch0_128[1],_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
      mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[1]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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      rxdataF_comp128[1] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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      //  print_shorts("rx:",rxdataF128+1);
      //  print_shorts("ch:",dl_ch128+1);
      //  print_shorts("pack:",rxdataF_comp128+1);

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      if (pilots==0) {
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch0_128[2],rxdataF128[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch0_128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[2]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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        rxdataF_comp128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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        //  print_shorts("rx:",rxdataF128+2);
        //  print_shorts("ch:",dl_ch128+2);
        //        print_shorts("pack:",rxdataF_comp128+2);

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        dl_ch0_128+=3;
        dl_ch1_128+=3;
        dl_ch_mag128+=3;
        dl_ch_mag128b+=3;
        rxdataF128+=3;
        rxdataF_comp128+=3;
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      } else {
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        dl_ch0_128+=2;
        dl_ch1_128+=2;
        dl_ch_mag128+=2;
        dl_ch_mag128b+=2;
        rxdataF128+=2;
        rxdataF_comp128+=2;
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      }
    }
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    Nre = (pilots==0) ? 12 : 8;
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    precoded_signal_strength += ((signal_energy_nodc(&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*Nre],
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						     (nb_rb*Nre))) - (phy_measurements->n0_power[aarx]));
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  } // rx_antennas
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  phy_measurements->precoded_cqi_dB[eNB_id][0] = dB_fixed2(precoded_signal_strength,phy_measurements->n0_power_tot);
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  //printf("eNB_id %d, symbol %d: precoded CQI %d dB\n",eNB_id,symbol,
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  //   phy_measurements->precoded_cqi_dB[eNB_id][0]);

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#elif defined(__arm__)

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  uint32_t rb,Nre;
  uint32_t aarx,symbol_mod,pilots=0;
  
  int16x4_t *dl_ch0_128,*dl_ch1_128,*rxdataF128;
  int16x8_t *dl_ch0_128b,*dl_ch1_128b;
  int32x4_t mmtmpD0,mmtmpD1,mmtmpD0b,mmtmpD1b;
  int16x8_t *dl_ch_mag128,*dl_ch_mag128b,mmtmpD2,mmtmpD3,mmtmpD4,*rxdataF_comp128;
  int16x8_t QAM_amp128,QAM_amp128b;
  
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  int16_t conj[4]__attribute__((aligned(16))) = {1,-1,1,-1};
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  int32x4_t output_shift128 = vmovq_n_s32(-(int32_t)output_shift);
  int32_t precoded_signal_strength=0;
  
  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;  
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  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
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    if (frame_parms->mode1_flag==1) // 10 out of 12 so don't reduce size
      { nb_rb=1+(5*nb_rb/6); }
    
    else
      { pilots=1; }
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  }
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  if (mod_order == 4) {
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    QAM_amp128  = vmovq_n_s16(QAM16_n1);  // 2/sqrt(10)
    QAM_amp128b = vmovq_n_s16(0);
    
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  } else if (mod_order == 6) {
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    QAM_amp128  = vmovq_n_s16(QAM64_n1); //
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    QAM_amp128b = vmovq_n_s16(QAM64_n2);
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  }
  
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  //    printf("comp: rxdataF_comp %p, symbol %d\n",rxdataF_comp[0],symbol);
  
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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    dl_ch0_128          = (int16x4_t*)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128          = (int16x4_t*)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch0_128b         = (int16x8_t*)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128b         = (int16x8_t*)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch_mag128        = (int16x8_t*)&dl_ch_mag[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch_mag128b       = (int16x8_t*)&dl_ch_magb[aarx][symbol*frame_parms->N_RB_DL*12];
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    rxdataF128          = (int16x4_t*)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
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    rxdataF_comp128     = (int16x8_t*)&rxdataF_comp[aarx][symbol*frame_parms->N_RB_DL*12];
    
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    for (rb=0; rb<nb_rb; rb++) {
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#ifdef DEBUG_DLSCH_DEMOD
      printf("mode 6 prec: rb %d, pmi->%d\n",rb,pmi_ext[rb]);
#endif
      prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128b[0],&dl_ch1_128b[0]);
      prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128b[1],&dl_ch1_128b[1]);
      
      if (pilots==0) {
	prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128b[2],&dl_ch1_128b[2]);
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      }
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      if (mod_order>2) {
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	// get channel amplitude if not QPSK
	mmtmpD0 = vmull_s16(dl_ch0_128[0], dl_ch0_128[0]);
	// mmtmpD0 = [ch0*ch0,ch1*ch1,ch2*ch2,ch3*ch3];
	mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	// mmtmpD0 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3]>>output_shift128 on 32-bits
	mmtmpD1 = vmull_s16(dl_ch0_128[1], dl_ch0_128[1]);
	mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	mmtmpD2 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	// mmtmpD2 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3,ch4*ch4 + ch5*ch5,ch4*ch4 + ch5*ch5,ch6*ch6 + ch7*ch7,ch6*ch6 + ch7*ch7]>>output_shift128 on 16-bits 
	mmtmpD0 = vmull_s16(dl_ch0_128[2], dl_ch0_128[2]);
	mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	mmtmpD1 = vmull_s16(dl_ch0_128[3], dl_ch0_128[3]);
	mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	mmtmpD3 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	if (pilots==0) {
	  mmtmpD0 = vmull_s16(dl_ch0_128[4], dl_ch0_128[4]);
	  mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	  mmtmpD1 = vmull_s16(dl_ch0_128[5], dl_ch0_128[5]);
	  mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	  mmtmpD4 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	  
	  
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	}
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	dl_ch_mag128b[0] = vqdmulhq_s16(mmtmpD2,QAM_amp128b);
	dl_ch_mag128b[1] = vqdmulhq_s16(mmtmpD3,QAM_amp128b);
	dl_ch_mag128[0] = vqdmulhq_s16(mmtmpD2,QAM_amp128);
	dl_ch_mag128[1] = vqdmulhq_s16(mmtmpD3,QAM_amp128);
	
	
1763
	if (pilots==0) {
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	  dl_ch_mag128b[2] = vqdmulhq_s16(mmtmpD4,QAM_amp128b);
	  dl_ch_mag128[2]  = vqdmulhq_s16(mmtmpD4,QAM_amp128);
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	}
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      }
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      mmtmpD0 = vmull_s16(dl_ch0_128[0], rxdataF128[0]);
      //mmtmpD0 = [Re(ch[0])Re(rx[0]) Im(ch[0])Im(ch[0]) Re(ch[1])Re(rx[1]) Im(ch[1])Im(ch[1])] 
      mmtmpD1 = vmull_s16(dl_ch0_128[1], rxdataF128[1]);
      //mmtmpD1 = [Re(ch[2])Re(rx[2]) Im(ch[2])Im(ch[2]) Re(ch[3])Re(rx[3]) Im(ch[3])Im(ch[3])] 
      mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			     vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
      //mmtmpD0 = [Re(ch[0])Re(rx[0])+Im(ch[0])Im(ch[0]) Re(ch[1])Re(rx[1])+Im(ch[1])Im(ch[1]) Re(ch[2])Re(rx[2])+Im(ch[2])Im(ch[2]) Re(ch[3])Re(rx[3])+Im(ch[3])Im(ch[3])] 
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      mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[0],*(int16x4_t*)conj)), rxdataF128[0]);
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      //mmtmpD0 = [-Im(ch[0])Re(rx[0]) Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1]) Re(ch[1])Im(rx[1])]
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      mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[1],*(int16x4_t*)conj)), rxdataF128[1]);
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      //mmtmpD0 = [-Im(ch[2])Re(rx[2]) Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3]) Re(ch[3])Im(rx[3])]
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      mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			     vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
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      //mmtmpD1 = [-Im(ch[0])Re(rx[0])+Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1])+Re(ch[1])Im(rx[1]) -Im(ch[2])Re(rx[2])+Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3])+Re(ch[3])Im(rx[3])]
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      mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
      mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
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      rxdataF_comp128[0] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
      
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      mmtmpD0 = vmull_s16(dl_ch0_128[2], rxdataF128[2]);
      mmtmpD1 = vmull_s16(dl_ch0_128[3], rxdataF128[3]);
      mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			     vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
      
      mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[2],*(int16x4_t*)conj)), rxdataF128[2]);
      mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[3],*(int16x4_t*)conj)), rxdataF128[3]);
      mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			     vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
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      mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
      mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
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      rxdataF_comp128[1] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
      
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      if (pilots==0) {
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	mmtmpD0 = vmull_s16(dl_ch0_128[4], rxdataF128[4]);
	mmtmpD1 = vmull_s16(dl_ch0_128[5], rxdataF128[5]);
	mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			       vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
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	mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[4],*(int16x4_t*)conj)), rxdataF128[4]);
	mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[5],*(int16x4_t*)conj)), rxdataF128[5]);
	mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			       vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
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	mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
	mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
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	rxdataF_comp128[2] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	
	
	dl_ch0_128+=6;
	dl_ch1_128+=6;
	dl_ch_mag128+=3;
	dl_ch_mag128b+=3;
	rxdataF128+=6;
	rxdataF_comp128+=3;
	
      } else { // we have a smaller PDSCH in symbols with pilots so skip last group of 4 REs and increment less
	dl_ch0_128+=4;
	dl_ch1_128+=4;
	dl_ch_mag128+=2;
	dl_ch_mag128b+=2;
	rxdataF128+=4;
	rxdataF_comp128+=2;
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      }
    }
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1836
    Nre = (pilots==0) ? 12 : 8;
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1837

1838 1839 1840
    
    precoded_signal_strength += ((signal_energy_nodc(&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*Nre],
						     (nb_rb*Nre))) - (phy_measurements->n0_power[aarx]));
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    // rx_antennas
  }
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  phy_measurements->precoded_cqi_dB[eNB_id][0] = dB_fixed2(precoded_signal_strength,phy_measurements->n0_power_tot);
        
  //printf("eNB_id %d, symbol %d: precoded CQI %d dB\n",eNB_id,symbol,
  //     phy_measurements->precoded_cqi_dB[eNB_id][0]);
     
#endif 
  _mm_empty();
  _m_empty();  
}    
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void dlsch_channel_compensation_TM34(LTE_DL_FRAME_PARMS *frame_parms,
                                    LTE_UE_PDSCH *lte_ue_pdsch_vars,
                                    PHY_MEASUREMENTS *phy_measurements,
                                    int eNB_id,
                                    unsigned char symbol,
                                    unsigned char mod_order0,
                                    unsigned char mod_order1,
                                    int harq_pid,
                                    int round,
                                    MIMO_mode_t mimo_mode,
                                    unsigned short nb_rb,
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                                    unsigned char output_shift0,
				    unsigned char output_shift1) {
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#if defined(__x86_64__) || defined(__i386__)

1869 1870 1871
  unsigned short rb,Nre;
  __m128i *dl_ch0_128,*dl_ch1_128,*dl_ch_mag0_128,*dl_ch_mag1_128,*dl_ch_mag0_128b,*dl_ch_mag1_128b,*rxdataF128,*rxdataF_comp0_128,*rxdataF_comp1_128;
  unsigned char aarx=0,symbol_mod,pilots=0;
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  int precoded_signal_strength0=0,precoded_signal_strength1=0;
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  int rx_power_correction;
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  int **rxdataF_ext           = lte_ue_pdsch_vars->rxdataF_ext;
  int **dl_ch_estimates_ext   = lte_ue_pdsch_vars->dl_ch_estimates_ext;
  int **dl_ch_mag0            = lte_ue_pdsch_vars->dl_ch_mag0;
  int **dl_ch_mag1            = lte_ue_pdsch_vars->dl_ch_mag1;
  int **dl_ch_magb0           = lte_ue_pdsch_vars->dl_ch_magb0;
  int **dl_ch_magb1           = lte_ue_pdsch_vars->dl_ch_magb1;
  int **rxdataF_comp0         = lte_ue_pdsch_vars->rxdataF_comp0;
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  int **rxdataF_comp1         = lte_ue_pdsch_vars->rxdataF_comp1[harq_pid][round];
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  unsigned char *pmi_ext     = lte_ue_pdsch_vars->pmi_ext;
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  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp0_128,QAM_amp0_128b,QAM_amp1_128,QAM_amp1_128b;   
    
  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
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  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp)))
    pilots=1;

  rx_power_correction = 1;
    
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 // printf("comp prec: symbol %d, pilots %d\n",symbol, pilots);
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  if (mod_order0 == 4) {
    QAM_amp0_128  = _mm_set1_epi16(QAM16_n1);
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    QAM_amp0_128b = _mm_setzero_si128();
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  } else if (mod_order0 == 6) {
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    QAM_amp0_128  = _mm_set1_epi16(QAM64_n1);
    QAM_amp0_128b = _mm_set1_epi16(QAM64_n2);
  }
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  if (mod_order1 == 4) {
    QAM_amp1_128  = _mm_set1_epi16(QAM16_n1);
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    QAM_amp1_128b = _mm_setzero_si128();
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  } else if (mod_order1 == 6) {
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    QAM_amp1_128  = _mm_set1_epi16(QAM64_n1);
    QAM_amp1_128b = _mm_set1_epi16(QAM64_n2);
  }
    
  for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++) {
        
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   // printf("symbol %d, rx antenna %d\n", symbol, aarx);

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    dl_ch0_128          = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12]; // this is h11
    dl_ch1_128          = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12]; // this is h12
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    dl_ch_mag0_128      = (__m128i *)&dl_ch_mag0[aarx][symbol*frame_parms->N_RB_DL*12]; //responsible for x1
    dl_ch_mag0_128b     = (__m128i *)&dl_ch_magb0[aarx][symbol*frame_parms->N_RB_DL*12];//responsible for x1
    dl_ch_mag1_128      = (__m128i *)&dl_ch_mag1[aarx][symbol*frame_parms->N_RB_DL*12];   //responsible for x2. always coming from tx2
    dl_ch_mag1_128b     = (__m128i *)&dl_ch_magb1[aarx][symbol*frame_parms->N_RB_DL*12];  //responsible for x2. always coming from tx2
    rxdataF128         = (__m128i *)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12]; //received signal on antenna of interest h11*x1+h12*x2
    rxdataF_comp0_128   = (__m128i *)&rxdataF_comp0[aarx][symbol*frame_parms->N_RB_DL*12]; //result of multipl with MF x1 on antenna of interest
    rxdataF_comp1_128   = (__m128i *)&rxdataF_comp1[aarx][symbol*frame_parms->N_RB_DL*12]; //result of multipl with MF x2 on antenna of interest
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    for (rb=0; rb<nb_rb; rb++) {
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      // combine TX channels using precoder from pmi
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      if (mimo_mode==LARGE_CDD) {
        prec2A_TM3_128(&dl_ch0_128[0],&dl_ch1_128[0]);
        prec2A_TM3_128(&dl_ch0_128[1],&dl_ch1_128[1]);
        
	
        if (pilots==0) {
          prec2A_TM3_128(&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1) {
        prec2A_TM4_128(0,&dl_ch0_128[0],&dl_ch1_128[0]); 
        prec2A_TM4_128(0,&dl_ch0_128[1],&dl_ch1_128[1]); 
        
        if (pilots==0) {
          prec2A_TM4_128(0,&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj) {
        prec2A_TM4_128(1,&dl_ch0_128[0],&dl_ch1_128[0]);
        prec2A_TM4_128(1,&dl_ch0_128[1],&dl_ch1_128[1]);
        
        if (pilots==0) {
          prec2A_TM4_128(1,&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
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        else if (mimo_mode==DUALSTREAM_PUSCH_PRECODING) {
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        prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128[0],&dl_ch1_128[0]);
        prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128[1],&dl_ch1_128[1]);
        
        if (pilots==0) {
          prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
      
      
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      else {
        LOG_E(PHY,"Unknown MIMO mode\n");
        return;
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      }
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      if (mod_order0>2) {  
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        // get channel amplitude if not QPSK
        
        mmtmpD0 = _mm_madd_epi16(dl_ch0_128[0],dl_ch0_128[0]);  
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        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift0);
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        mmtmpD1 = _mm_madd_epi16(dl_ch0_128[1],dl_ch0_128[1]);
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        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift0);
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        mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);
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        dl_ch_mag0_128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
        dl_ch_mag0_128b[0] = dl_ch_mag0_128[0];
        dl_ch_mag0_128[0] = _mm_mulhi_epi16(dl_ch_mag0_128[0],QAM_amp0_128);
        dl_ch_mag0_128[0] = _mm_slli_epi16(dl_ch_mag0_128[0],1);
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        //  print_shorts("dl_ch_mag0_128[0]=",&dl_ch_mag0_128[0]);
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        dl_ch_mag0_128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
        dl_ch_mag0_128b[1] = dl_ch_mag0_128[1];
        dl_ch_mag0_128[1] = _mm_mulhi_epi16(dl_ch_mag0_128[1],QAM_amp0_128);
        dl_ch_mag0_128[1] = _mm_slli_epi16(dl_ch_mag0_128[1],1);
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        if (pilots==0) {
          mmtmpD0 = _mm_madd_epi16(dl_ch0_128[2],dl_ch0_128[2]);
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          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift0);
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          mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);
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          dl_ch_mag0_128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);
          dl_ch_mag0_128b[2] = dl_ch_mag0_128[2];
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          dl_ch_mag0_128[2] = _mm_mulhi_epi16(dl_ch_mag0_128[2],QAM_amp0_128);
          dl_ch_mag0_128[2] = _mm_slli_epi16(dl_ch_mag0_128[2],1);        
        }
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        dl_ch_mag0_128b[0] = _mm_mulhi_epi16(dl_ch_mag0_128b[0],QAM_amp0_128b);
        dl_ch_mag0_128b[0] = _mm_slli_epi16(dl_ch_mag0_128b[0],1);
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       // print_shorts("dl_ch_mag0_128b[0]=",&dl_ch_mag0_128b[0]);
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        dl_ch_mag0_128b[1] = _mm_mulhi_epi16(dl_ch_mag0_128b[1],QAM_amp0_128b);
        dl_ch_mag0_128b[1] = _mm_slli_epi16(dl_ch_mag0_128b[1],1);
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        if (pilots==0) {
          dl_ch_mag0_128b[2] = _mm_mulhi_epi16(dl_ch_mag0_128b[2],QAM_amp0_128b);
          dl_ch_mag0_128b[2] = _mm_slli_epi16(dl_ch_mag0_128b[2],1);      
        }
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      }

      if (mod_order1>2) {  
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        // get channel amplitude if not QPSK
        
        mmtmpD0 = _mm_madd_epi16(dl_ch1_128[0],dl_ch1_128[0]);  
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        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift1);
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        mmtmpD1 = _mm_madd_epi16(dl_ch1_128[1],dl_ch1_128[1]);
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        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift1);
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        mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);
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        dl_ch_mag1_128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
        dl_ch_mag1_128b[0] = dl_ch_mag1_128[0];
        dl_ch_mag1_128[0] = _mm_mulhi_epi16(dl_ch_mag1_128[0],QAM_amp1_128);
        dl_ch_mag1_128[0] = _mm_slli_epi16(dl_ch_mag1_128[0],1);
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       // print_shorts("dl_ch_mag1_128[0]=",&dl_ch_mag1_128[0]);
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        dl_ch_mag1_128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
        dl_ch_mag1_128b[1] = dl_ch_mag1_128[1];
        dl_ch_mag1_128[1] = _mm_mulhi_epi16(dl_ch_mag1_128[1],QAM_amp1_128);
        dl_ch_mag1_128[1] = _mm_slli_epi16(dl_ch_mag1_128[1],1);
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        if (pilots==0) {
          mmtmpD0 = _mm_madd_epi16(dl_ch1_128[2],dl_ch1_128[2]);
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          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift1);
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          mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);
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          dl_ch_mag1_128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);
          dl_ch_mag1_128b[2] = dl_ch_mag1_128[2];
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          dl_ch_mag1_128[2] = _mm_mulhi_epi16(dl_ch_mag1_128[2],QAM_amp1_128);
          dl_ch_mag1_128[2] = _mm_slli_epi16(dl_ch_mag1_128[2],1);        
        }
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        dl_ch_mag1_128b[0] = _mm_mulhi_epi16(dl_ch_mag1_128b[0],QAM_amp1_128b);
        dl_ch_mag1_128b[0] = _mm_slli_epi16(dl_ch_mag1_128b[0],1);
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       // print_shorts("dl_ch_mag1_128b[0]=",&dl_ch_mag1_128b[0]);
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        dl_ch_mag1_128b[1] = _mm_mulhi_epi16(dl_ch_mag1_128b[1],QAM_amp1_128b);
        dl_ch_mag1_128b[1] = _mm_slli_epi16(dl_ch_mag1_128b[1],1);
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        if (pilots==0) {
          dl_ch_mag1_128b[2] = _mm_mulhi_epi16(dl_ch_mag1_128b[2],QAM_amp1_128b);
          dl_ch_mag1_128b[2] = _mm_slli_epi16(dl_ch_mag1_128b[2],1);      
        }
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      }

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      // layer 0 
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      // MF multiply by conjugated channel
      mmtmpD0 = _mm_madd_epi16(dl_ch0_128[0],rxdataF128[0]);
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    //  print_ints("re",&mmtmpD0); 
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      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpD1 = _mm_shufflelo_epi16(dl_ch0_128[0],_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
      mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[0]);
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           // print_ints("im",&mmtmpD1);
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      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
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      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift0);
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           // printf("Shift: %d\n",output_shift);
          // print_ints("re(shift)",&mmtmpD0);
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      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift0);
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           // print_ints("im(shift)",&mmtmpD1);
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      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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          //  print_ints("c0",&mmtmpD2);
          // print_ints("c1",&mmtmpD3);
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      rxdataF_comp0_128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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           // print_shorts("rx:",rxdataF128);
           // print_shorts("ch:",dl_ch0_128);
        // print_shorts("pack:",rxdataF_comp0_128);
          
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      // multiply by conjugated channel
      mmtmpD0 = _mm_madd_epi16(dl_ch0_128[1],rxdataF128[1]);
      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpD1 = _mm_shufflelo_epi16(dl_ch0_128[1],_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
      mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[1]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
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      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift0);
      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift0);
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      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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      rxdataF_comp0_128[1] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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           //  print_shorts("rx:",rxdataF128+1);
            //  print_shorts("ch:",dl_ch0_128+1);
            // print_shorts("pack:",rxdataF_comp0_128+1);        
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      if (pilots==0) {
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch0_128[2],rxdataF128[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch0_128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[2]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
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        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift0);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift0);
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        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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        rxdataF_comp0_128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
           //   print_shorts("rx:",rxdataF128+2);
           //   print_shorts("ch:",dl_ch0_128+2);
            //  print_shorts("pack:",rxdataF_comp0_128+2);
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      }
      
      
      // layer 1
      // MF multiply by conjugated channel
      mmtmpD0 = _mm_madd_epi16(dl_ch1_128[0],rxdataF128[0]);
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           //  print_ints("re",&mmtmpD0);
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     // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
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      mmtmpD1 = _mm_shufflelo_epi16(dl_ch1_128[0],_MM_SHUFFLE(2,3,0,1));
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      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
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            //  print_ints("im",&mmtmpD1);
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      mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[0]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
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      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift1);
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             // print_ints("re(shift)",&mmtmpD0);
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      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift1);
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             // print_ints("im(shift)",&mmtmpD1);
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      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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             // print_ints("c0",&mmtmpD2);
             // print_ints("c1",&mmtmpD3);
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      rxdataF_comp1_128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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            // print_shorts("rx:",rxdataF128);
            //  print_shorts("ch:",dl_ch1_128);
            // print_shorts("pack:",rxdataF_comp1_128);
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     // multiply by conjugated channel
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      mmtmpD0 = _mm_madd_epi16(dl_ch1_128[1],rxdataF128[1]);
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      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
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      mmtmpD1 = _mm_shufflelo_epi16(dl_ch1_128[1],_MM_SHUFFLE(2,3,0,1));
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      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
      mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[1]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
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      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift1);
      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift1);
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      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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      rxdataF_comp1_128[1] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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            //  print_shorts("rx:",rxdataF128+1);
           // print_shorts("ch:",dl_ch1_128+1);
            // print_shorts("pack:",rxdataF_comp1_128+1);        
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      if (pilots==0) {
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch1_128[2],rxdataF128[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch1_128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,rxdataF128[2]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
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        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift1);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift1);
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        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
        
        rxdataF_comp1_128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
          //   print_shorts("rx:",rxdataF128+2);
           //  print_shorts("ch:",dl_ch1_128+2);
             //         print_shorts("pack:",rxdataF_comp1_128+2);
        
        dl_ch0_128+=3;
        dl_ch1_128+=3;
        dl_ch_mag0_128+=3;
        dl_ch_mag1_128+=3;
        dl_ch_mag0_128b+=3;
        dl_ch_mag1_128b+=3;
        rxdataF128+=3;
        rxdataF_comp0_128+=3;
        rxdataF_comp1_128+=3;
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      }
      else {
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        dl_ch0_128+=2;
        dl_ch1_128+=2;
        dl_ch_mag0_128+=2;
        dl_ch_mag1_128+=2;
        dl_ch_mag0_128b+=2;
        dl_ch_mag1_128b+=2;
        rxdataF128+=2;
        rxdataF_comp0_128+=2;
        rxdataF_comp1_128+=2;
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      }
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    } // rb loop
    Nre = (pilots==0) ? 12 : 8;
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    precoded_signal_strength0 += ((signal_energy_nodc(&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*Nre],
                                                        (nb_rb*Nre))*rx_power_correction) - (phy_measurements->n0_power[aarx]));
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    precoded_signal_strength1 += ((signal_energy_nodc(&dl_ch_estimates_ext[aarx+2][symbol*frame_parms->N_RB_DL*Nre],
                                                        (nb_rb*Nre))*rx_power_correction) - (phy_measurements->n0_power[aarx]));
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  } // rx_antennas
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  phy_measurements->precoded_cqi_dB[eNB_id][0] = dB_fixed2(precoded_signal_strength0,phy_measurements->n0_power_tot);
  phy_measurements->precoded_cqi_dB[eNB_id][1] = dB_fixed2(precoded_signal_strength1,phy_measurements->n0_power_tot);
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 // printf("eNB_id %d, symbol %d: precoded CQI %d dB\n",eNB_id,symbol,
     //  phy_measurements->precoded_cqi_dB[eNB_id][0]);
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  _mm_empty();
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  _m_empty();
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  #elif defined(__arm__)
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  unsigned short rb,Nre;
  unsigned char aarx,symbol_mod,pilots=0;
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  int precoded_signal_strength0=0,precoded_signal_strength1=0, rx_power_correction;  
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  int16x4_t *dl_ch0_128,*rxdataF128;
  int16x4_t *dl_ch1_128;
  int16x8_t *dl_ch0_128b,*dl_ch1_128b;
  
  int32x4_t mmtmpD0,mmtmpD1,mmtmpD0b,mmtmpD1b;
  int16x8_t *dl_ch_mag0_128,*dl_ch_mag0_128b,*dl_ch_mag1_128,*dl_ch_mag1_128b,mmtmpD2,mmtmpD3,mmtmpD4,*rxdataF_comp0_128,*rxdataF_comp1_128;
  int16x8_t QAM_amp0_128,QAM_amp0_128b,QAM_amp1_128,QAM_amp1_128b;
  int32x4_t output_shift128 = vmovq_n_s32(-(int32_t)output_shift);
  
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  int **rxdataF_ext           = lte_ue_pdsch_vars->rxdataF_ext;
  int **dl_ch_estimates_ext   = lte_ue_pdsch_vars->dl_ch_estimates_ext;
  int **dl_ch_mag0            = lte_ue_pdsch_vars->dl_ch_mag0;
  int **dl_ch_mag1            = lte_ue_pdsch_vars->dl_ch_mag1;
  int **dl_ch_magb0           = lte_ue_pdsch_vars->dl_ch_magb0;
  int **dl_ch_magb1           = lte_ue_pdsch_vars->dl_ch_magb1;
  int **rxdataF_comp0         = lte_ue_pdsch_vars->rxdataF_comp0;
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  int **rxdataF_comp1         = lte_ue_pdsch_vars->rxdataF_comp1[harq_pid][round];
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  int16_t conj[4]__attribute__((aligned(16))) = {1,-1,1,-1};
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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
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  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
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    if (frame_parms->mode1_flag==1) // 10 out of 12 so don't reduce size
      { nb_rb=1+(5*nb_rb/6); }
    
    else
      { pilots=1; }
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  }
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  rx_power_correction=1;
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  if (mod_order0 == 4) {
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    QAM_amp0_128  = vmovq_n_s16(QAM16_n1);  // 2/sqrt(10)
    QAM_amp0_128b = vmovq_n_s16(0);
    
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  } else if (mod_order0 == 6) {
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    QAM_amp0_128  = vmovq_n_s16(QAM64_n1); //
    QAM_amp0_128b = vmovq_n_s16(QAM64_n2);
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  }
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  if (mod_order1 == 4) {
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    QAM_amp1_128  = vmovq_n_s16(QAM16_n1);  // 2/sqrt(10)
    QAM_amp1_128b = vmovq_n_s16(0);
    
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  } else if (mod_order1 == 6) {
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    QAM_amp1_128  = vmovq_n_s16(QAM64_n1); //
    QAM_amp1_128b = vmovq_n_s16(QAM64_n2);
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  }
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  //    printf("comp: rxdataF_comp %p, symbol %d\n",rxdataF_comp[0],symbol);
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  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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    dl_ch0_128          = (int16x4_t*)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128          = (int16x4_t*)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch0_128b          = (int16x8_t*)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128b          = (int16x8_t*)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch_mag0_128      = (int16x8_t*)&dl_ch_mag0[aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch_mag0_128b     = (int16x8_t*)&dl_ch_magb0[aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch_mag1_128      = (int16x8_t*)&dl_ch_mag1[aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch_mag1_128b     = (int16x8_t*)&dl_ch_magb1[aarx][symbol*frame_parms->N_RB_DL*12];
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    rxdataF128          = (int16x4_t*)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp0_128   = (int16x8_t*)&rxdataF_comp0[aarx][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp1_128   = (int16x8_t*)&rxdataF_comp1[aarx][symbol*frame_parms->N_RB_DL*12];
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    for (rb=0; rb<nb_rb; rb++) {
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      // combine TX channels using precoder from pmi
      if (mimo_mode==LARGE_CDD) {
        prec2A_TM3_128(&dl_ch0_128[0],&dl_ch1_128[0]);
        prec2A_TM3_128(&dl_ch0_128[1],&dl_ch1_128[1]);
        
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        if (pilots==0) {
          prec2A_TM3_128(&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1) {
        prec2A_TM4_128(0,&dl_ch0_128[0],&dl_ch1_128[0]); 
        prec2A_TM4_128(0,&dl_ch0_128[1],&dl_ch1_128[1]); 
        
        if (pilots==0) {
          prec2A_TM4_128(0,&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj) {
        prec2A_TM4_128(1,&dl_ch0_128[0],&dl_ch1_128[0]);
        prec2A_TM4_128(1,&dl_ch0_128[1],&dl_ch1_128[1]);
        
        if (pilots==0) {
          prec2A_TM4_128(1,&dl_ch0_128[2],&dl_ch1_128[2]); 
        }
      }
      else {
        LOG_E(PHY,"Unknown MIMO mode\n");
        return;
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      }

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      if (mod_order0>2) {
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	// get channel amplitude if not QPSK
	mmtmpD0 = vmull_s16(dl_ch0_128[0], dl_ch0_128[0]);
	// mmtmpD0 = [ch0*ch0,ch1*ch1,ch2*ch2,ch3*ch3];
	mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	// mmtmpD0 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3]>>output_shift128 on 32-bits
	mmtmpD1 = vmull_s16(dl_ch0_128[1], dl_ch0_128[1]);
	mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	mmtmpD2 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	// mmtmpD2 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3,ch4*ch4 + ch5*ch5,ch4*ch4 + ch5*ch5,ch6*ch6 + ch7*ch7,ch6*ch6 + ch7*ch7]>>output_shift128 on 16-bits 
	mmtmpD0 = vmull_s16(dl_ch0_128[2], dl_ch0_128[2]);
	mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	mmtmpD1 = vmull_s16(dl_ch0_128[3], dl_ch0_128[3]);
	mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	mmtmpD3 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	  
	if (pilots==0) {
	  mmtmpD0 = vmull_s16(dl_ch0_128[4], dl_ch0_128[4]);
	  mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	  mmtmpD1 = vmull_s16(dl_ch0_128[5], dl_ch0_128[5]);
	  mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	  mmtmpD4 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	    
	    
	}
	  
	dl_ch_mag0_128b[0] = vqdmulhq_s16(mmtmpD2,QAM_amp0_128b);
	dl_ch_mag0_128b[1] = vqdmulhq_s16(mmtmpD3,QAM_amp0_128b);
	dl_ch_mag0_128[0] = vqdmulhq_s16(mmtmpD2,QAM_amp0_128);
	dl_ch_mag0_128[1] = vqdmulhq_s16(mmtmpD3,QAM_amp0_128);
	  
	  
	if (pilots==0) {
	  dl_ch_mag0_128b[2] = vqdmulhq_s16(mmtmpD4,QAM_amp0_128b);
	  dl_ch_mag0_128[2]  = vqdmulhq_s16(mmtmpD4,QAM_amp0_128);
	}
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      }

      if (mod_order1>2) {
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	// get channel amplitude if not QPSK
	mmtmpD0 = vmull_s16(dl_ch1_128[0], dl_ch1_128[0]);
	// mmtmpD0 = [ch0*ch0,ch1*ch1,ch2*ch2,ch3*ch3];
	mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	// mmtmpD0 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3]>>output_shift128 on 32-bits
	mmtmpD1 = vmull_s16(dl_ch1_128[1], dl_ch1_128[1]);
	mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	mmtmpD2 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	// mmtmpD2 = [ch0*ch0 + ch1*ch1,ch0*ch0 + ch1*ch1,ch2*ch2 + ch3*ch3,ch2*ch2 + ch3*ch3,ch4*ch4 + ch5*ch5,ch4*ch4 + ch5*ch5,ch6*ch6 + ch7*ch7,ch6*ch6 + ch7*ch7]>>output_shift128 on 16-bits 
	mmtmpD0 = vmull_s16(dl_ch1_128[2], dl_ch1_128[2]);
	mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	mmtmpD1 = vmull_s16(dl_ch1_128[3], dl_ch1_128[3]);
	mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	mmtmpD3 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	  
	if (pilots==0) {
	  mmtmpD0 = vmull_s16(dl_ch1_128[4], dl_ch1_128[4]);
	  mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
	  mmtmpD1 = vmull_s16(dl_ch1_128[5], dl_ch1_128[5]);
	  mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
	  mmtmpD4 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	    
	    
	}
	  
	dl_ch_mag1_128b[0] = vqdmulhq_s16(mmtmpD2,QAM_amp1_128b);
	dl_ch_mag1_128b[1] = vqdmulhq_s16(mmtmpD3,QAM_amp1_128b);
	dl_ch_mag1_128[0] = vqdmulhq_s16(mmtmpD2,QAM_amp1_128);
	dl_ch_mag1_128[1] = vqdmulhq_s16(mmtmpD3,QAM_amp1_128);
	  
	  
	if (pilots==0) {
	  dl_ch_mag1_128b[2] = vqdmulhq_s16(mmtmpD4,QAM_amp1_128b);
	  dl_ch_mag1_128[2]  = vqdmulhq_s16(mmtmpD4,QAM_amp1_128);
	}
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      }
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      mmtmpD0 = vmull_s16(dl_ch0_128[0], rxdataF128[0]);
      //mmtmpD0 = [Re(ch[0])Re(rx[0]) Im(ch[0])Im(ch[0]) Re(ch[1])Re(rx[1]) Im(ch[1])Im(ch[1])] 
      mmtmpD1 = vmull_s16(dl_ch0_128[1], rxdataF128[1]);
      //mmtmpD1 = [Re(ch[2])Re(rx[2]) Im(ch[2])Im(ch[2]) Re(ch[3])Re(rx[3]) Im(ch[3])Im(ch[3])] 
      mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			     vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
      //mmtmpD0 = [Re(ch[0])Re(rx[0])+Im(ch[0])Im(ch[0]) Re(ch[1])Re(rx[1])+Im(ch[1])Im(ch[1]) Re(ch[2])Re(rx[2])+Im(ch[2])Im(ch[2]) Re(ch[3])Re(rx[3])+Im(ch[3])Im(ch[3])] 
	
      mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[0],*(int16x4_t*)conj)), rxdataF128[0]);
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      //mmtmpD0 = [-Im(ch[0])Re(rx[0]) Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1]) Re(ch[1])Im(rx[1])]
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      mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[1],*(int16x4_t*)conj)), rxdataF128[1]);
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      //mmtmpD0 = [-Im(ch[2])Re(rx[2]) Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3]) Re(ch[3])Im(rx[3])]
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      mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			     vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
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      //mmtmpD1 = [-Im(ch[0])Re(rx[0])+Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1])+Re(ch[1])Im(rx[1]) -Im(ch[2])Re(rx[2])+Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3])+Re(ch[3])Im(rx[3])]
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      mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
      mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
      rxdataF_comp0_128[0] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	
      mmtmpD0 = vmull_s16(dl_ch0_128[2], rxdataF128[2]);
      mmtmpD1 = vmull_s16(dl_ch0_128[3], rxdataF128[3]);
      mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			     vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
      
      mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[2],*(int16x4_t*)conj)), rxdataF128[2]);
      mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[3],*(int16x4_t*)conj)), rxdataF128[3]);
      mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			     vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
	
      mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
      mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
      rxdataF_comp0_128[1] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	
      // second stream
      mmtmpD0 = vmull_s16(dl_ch1_128[0], rxdataF128[0]);
      mmtmpD1 = vmull_s16(dl_ch1_128[1], rxdataF128[1]);
      mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			     vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
      mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[0],*(int16x4_t*)conj)), rxdataF128[0]);
	
      mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[1],*(int16x4_t*)conj)), rxdataF128[1]);
      //mmtmpD0 = [-Im(ch[2])Re(rx[2]) Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3]) Re(ch[3])Im(rx[3])]
      mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			     vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
      //mmtmpD1 = [-Im(ch[0])Re(rx[0])+Re(ch[0])Im(rx[0]) -Im(ch[1])Re(rx[1])+Re(ch[1])Im(rx[1]) -Im(ch[2])Re(rx[2])+Re(ch[2])Im(rx[2]) -Im(ch[3])Re(rx[3])+Re(ch[3])Im(rx[3])]
	
      mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
      mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
      rxdataF_comp1_128[0] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	
      mmtmpD0 = vmull_s16(dl_ch1_128[2], rxdataF128[2]);
      mmtmpD1 = vmull_s16(dl_ch1_128[3], rxdataF128[3]);
      mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			     vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
	
      mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[2],*(int16x4_t*)conj)), rxdataF128[2]);
      mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[3],*(int16x4_t*)conj)), rxdataF128[3]);
      mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			     vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
	
      mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
      mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
      rxdataF_comp1_128[1] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
     
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      if (pilots==0) {
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	mmtmpD0 = vmull_s16(dl_ch0_128[4], rxdataF128[4]);
	mmtmpD1 = vmull_s16(dl_ch0_128[5], rxdataF128[5]);
	mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			       vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
	  
	mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[4],*(int16x4_t*)conj)), rxdataF128[4]);
	mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch0_128[5],*(int16x4_t*)conj)), rxdataF128[5]);
	mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			       vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
	  
	  
	mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
	mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
	rxdataF_comp0_128[2] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
	mmtmpD0 = vmull_s16(dl_ch1_128[4], rxdataF128[4]);
	mmtmpD1 = vmull_s16(dl_ch1_128[5], rxdataF128[5]);
	mmtmpD0 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0),vget_high_s32(mmtmpD0)),
			       vpadd_s32(vget_low_s32(mmtmpD1),vget_high_s32(mmtmpD1)));
	  
	mmtmpD0b = vmull_s16(vrev32_s16(vmul_s16(dl_ch1_128[4],*(int16x4_t*)conj)), rxdataF128[4]);
	mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch1_128[5],*(int16x4_t*)conj)), rxdataF128[5]);
	mmtmpD1 = vcombine_s32(vpadd_s32(vget_low_s32(mmtmpD0b),vget_high_s32(mmtmpD0b)),
			       vpadd_s32(vget_low_s32(mmtmpD1b),vget_high_s32(mmtmpD1b)));
	  
	  
	mmtmpD0 = vqshlq_s32(mmtmpD0,output_shift128);
	mmtmpD1 = vqshlq_s32(mmtmpD1,output_shift128);
	rxdataF_comp1_128[2] = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
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      }
    }
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    Nre = (pilots==0) ? 12 : 8;
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    // rx_antennas
  }
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  Nre = (pilots==0) ? 12 : 8;
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  precoded_signal_strength0 += ((signal_energy_nodc(&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*Nre],
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                                                        (nb_rb*Nre))*rx_power_correction) - (phy_measurements->n0_power[aarx]));
      
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  precoded_signal_strength1 += ((signal_energy_nodc(&dl_ch_estimates_ext[aarx+2][symbol*frame_parms->N_RB_DL*Nre],
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                                                        (nb_rb*Nre))*rx_power_correction) - (phy_measurements->n0_power[aarx]));
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  phy_measurements->precoded_cqi_dB[eNB_id][0] = dB_fixed2(precoded_signal_strength0,phy_measurements->n0_power_tot);
  phy_measurements->precoded_cqi_dB[eNB_id][1] = dB_fixed2(precoded_signal_strength1,phy_measurements->n0_power_tot);
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#endif
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}
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void dlsch_dual_stream_correlation(LTE_DL_FRAME_PARMS *frame_parms,
                                   unsigned char symbol,
                                   unsigned short nb_rb,
                                   int **dl_ch_estimates_ext,
                                   int **dl_ch_estimates_ext_i,
                                   int **dl_ch_rho_ext,
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                                   unsigned char output_shift)
{

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#if defined(__x86_64__)||defined(__i386__)

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  unsigned short rb;
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  __m128i *dl_ch128,*dl_ch128i,*dl_ch_rho128,mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3;
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  unsigned char aarx,symbol_mod,pilots=0;
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  //    printf("dlsch_dual_stream_correlation: symbol %d\n",symbol);

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
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  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
    pilots=1;
  }
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  //  printf("Dual stream correlation (%p)\n",dl_ch_estimates_ext_i);

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  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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 //printf ("antenna %d", aarx);
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    dl_ch128          = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
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    if (dl_ch_estimates_ext_i == NULL) // TM3/4
      dl_ch128i         = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
    else
      dl_ch128i         = (__m128i *)&dl_ch_estimates_ext_i[aarx][symbol*frame_parms->N_RB_DL*12];
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    dl_ch_rho128      = (__m128i *)&dl_ch_rho_ext[aarx][symbol*frame_parms->N_RB_DL*12];
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    for (rb=0; rb<nb_rb; rb++) {
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      // multiply by conjugated channel
      mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128i[0]);
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      //      print_ints("re",&mmtmpD0);
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      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)&conjugate[0]);
      mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128i[0]);
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      //      print_ints("im",&mmtmpD1);
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      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
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      //      print_ints("re(shift)",&mmtmpD0);
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      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
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      //      print_ints("im(shift)",&mmtmpD1);
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      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
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      //      print_ints("c0",&mmtmpD2);
      //      print_ints("c1",&mmtmpD3);
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      dl_ch_rho128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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    // print_shorts("rho 0:",dl_ch_rho128);
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      // multiply by conjugated channel
      mmtmpD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128i[1]);
      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
      mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128i[1]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
      mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
      mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
      mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
      dl_ch_rho128[1] =_mm_packs_epi32(mmtmpD2,mmtmpD3);
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      if (pilots==0) {  
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        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128i[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_shufflehi_epi16(mmtmpD1,_MM_SHUFFLE(2,3,0,1));
        mmtmpD1 = _mm_sign_epi16(mmtmpD1,*(__m128i*)conjugate);
        mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch128i[2]);
        // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
        mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
        mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);
        mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
        mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);
        dl_ch_rho128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
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       dl_ch128+=3;
        dl_ch128i+=3;
        dl_ch_rho128+=3;
      } else {

        dl_ch128+=2;
        dl_ch128i+=2;
        dl_ch_rho128+=2;
      }
    }           
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  }
    
  _mm_empty();
  _m_empty();

#elif defined(__arm__)

#endif
}

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void dlsch_detection_mrc(LTE_DL_FRAME_PARMS *frame_parms,
                         int **rxdataF_comp,
                         int **rxdataF_comp_i,
                         int **rho,
                         int **rho_i,
                         int **dl_ch_mag,
                         int **dl_ch_magb,
                         int **dl_ch_mag_i,
                         int **dl_ch_magb_i,
                         unsigned char symbol,
                         unsigned short nb_rb,
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                         unsigned char dual_stream_UE)
{

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#if defined(__x86_64__)||defined(__i386__)

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  unsigned char aatx;
  int i;
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  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*dl_ch_mag128_0,*dl_ch_mag128_1,*dl_ch_mag128_0b,*dl_ch_mag128_1b,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1,
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    *dl_ch_mag128_i0,*dl_ch_mag128_i1,*dl_ch_mag128_i0b,*dl_ch_mag128_i1b;
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  if (frame_parms->nb_antennas_rx>1) {

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    for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++) {

      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_0      = (__m128i *)&dl_ch_mag[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_1      = (__m128i *)&dl_ch_mag[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_0b     = (__m128i *)&dl_ch_magb[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_1b     = (__m128i *)&dl_ch_magb[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
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      // MRC on each re of rb, both on MF output and magnitude (for 16QAM/64QAM llr computation)
      for (i=0;i<nb_rb*3;i++) {
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        rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
        dl_ch_mag128_0[i]    = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_0[i],1),_mm_srai_epi16(dl_ch_mag128_1[i],1));
        dl_ch_mag128_0b[i]   = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_0b[i],1),_mm_srai_epi16(dl_ch_mag128_1b[i],1));
          //       print_shorts("mrc comp0:",&rxdataF_comp128_0[i]);
	//	 print_shorts("mrc mag0:",&dl_ch_mag128_0[i]);
	//	 print_shorts("mrc mag0b:",&dl_ch_mag128_0b[i]);
        //      print_shorts("mrc rho1:",&rho128_1[i]);
	
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      }
    }

    if (rho) {
      rho128_0 = (__m128i *) &rho[0][symbol*frame_parms->N_RB_DL*12];
      rho128_1 = (__m128i *) &rho[1][symbol*frame_parms->N_RB_DL*12];
      for (i=0;i<nb_rb*3;i++) {
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        //      print_shorts("mrc rho0:",&rho128_0[i]);
        //      print_shorts("mrc rho1:",&rho128_1[i]);
        rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));
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      }
    }


    if (dual_stream_UE == 1) {
      rho128_i0 = (__m128i *) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
      rho128_i1 = (__m128i *) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
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      rxdataF_comp128_i0   = (__m128i *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_i1   = (__m128i *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_i0      = (__m128i *)&dl_ch_mag_i[0][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_i1      = (__m128i *)&dl_ch_mag_i[1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_i0b     = (__m128i *)&dl_ch_magb_i[0][symbol*frame_parms->N_RB_DL*12];
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      dl_ch_mag128_i1b     = (__m128i *)&dl_ch_magb_i[1][symbol*frame_parms->N_RB_DL*12];
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      for (i=0; i<nb_rb*3; i++) {
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        rxdataF_comp128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_i0[i],1),_mm_srai_epi16(rxdataF_comp128_i1[i],1));
        rho128_i0[i]           = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
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        dl_ch_mag128_i0[i]    = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_i0[i],1),_mm_srai_epi16(dl_ch_mag128_i1[i],1));
        dl_ch_mag128_i0b[i]    = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_i0b[i],1),_mm_srai_epi16(dl_ch_mag128_i1b[i],1));
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      }
    }
  }
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  _mm_empty();
  _m_empty();
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#elif defined(__arm__)

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  unsigned char aatx;
  int i;
  int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*dl_ch_mag128_0,*dl_ch_mag128_1,*dl_ch_mag128_0b,*dl_ch_mag128_1b,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1,*dl_ch_mag128_i0,*dl_ch_mag128_i1,*dl_ch_mag128_i0b,*dl_ch_mag128_i1b;

  if (frame_parms->nb_antennas_rx>1) {

    for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++) {

      rxdataF_comp128_0   = (int16x8_t *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_0      = (int16x8_t *)&dl_ch_mag[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_1      = (int16x8_t *)&dl_ch_mag[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_0b     = (int16x8_t *)&dl_ch_magb[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_1b     = (int16x8_t *)&dl_ch_magb[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];

      // MRC on each re of rb, both on MF output and magnitude (for 16QAM/64QAM llr computation)
      for (i=0; i<nb_rb*3; i++) {
        rxdataF_comp128_0[i] = vhaddq_s16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
        dl_ch_mag128_0[i]    = vhaddq_s16(dl_ch_mag128_0[i],dl_ch_mag128_1[i]);
        dl_ch_mag128_0b[i]   = vhaddq_s16(dl_ch_mag128_0b[i],dl_ch_mag128_1b[i]);
      }
    }

    if (rho) {
      rho128_0 = (int16x8_t *) &rho[0][symbol*frame_parms->N_RB_DL*12];
      rho128_1 = (int16x8_t *) &rho[1][symbol*frame_parms->N_RB_DL*12];

      for (i=0; i<nb_rb*3; i++) {
        //  print_shorts("mrc rho0:",&rho128_0[i]);
        //  print_shorts("mrc rho1:",&rho128_1[i]);
        rho128_0[i] = vhaddq_s16(rho128_0[i],rho128_1[i]);
      }
    }


    if (dual_stream_UE == 1) {
      rho128_i0 = (int16x8_t *) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
      rho128_i1 = (int16x8_t *) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_i0   = (int16x8_t *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_i1   = (int16x8_t *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];

      dl_ch_mag128_i0      = (int16x8_t *)&dl_ch_mag_i[0][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_i1      = (int16x8_t *)&dl_ch_mag_i[1][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_i0b     = (int16x8_t *)&dl_ch_magb_i[0][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128_i1b     = (int16x8_t *)&dl_ch_magb_i[1][symbol*frame_parms->N_RB_DL*12];

      for (i=0; i<nb_rb*3; i++) {
        rxdataF_comp128_i0[i] = vhaddq_s16(rxdataF_comp128_i0[i],rxdataF_comp128_i1[i]);
        rho128_i0[i]          = vhaddq_s16(rho128_i0[i],rho128_i1[i]);

        dl_ch_mag128_i0[i]    = vhaddq_s16(dl_ch_mag128_i0[i],dl_ch_mag128_i1[i]);
        dl_ch_mag128_i0b[i]   = vhaddq_s16(dl_ch_mag128_i0b[i],dl_ch_mag128_i1b[i]);
      }
    }
  }

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#endif
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}

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void dlsch_detection_mrc_TM34(LTE_DL_FRAME_PARMS *frame_parms,
			      LTE_UE_PDSCH *lte_ue_pdsch_vars, 
			      int harq_pid,
			      int round,
			      unsigned char symbol,
			      unsigned short nb_rb,
			      unsigned char dual_stream_UE) {
    
  unsigned char aatx;
  int i;
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*dl_ch_mag128_0,*dl_ch_mag128_1,*dl_ch_mag128_0b,*dl_ch_mag128_1b,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1,*dl_ch_mag128_i0,*dl_ch_mag128_i1,*dl_ch_mag128_i0b,*dl_ch_mag128_i1b;

  int **rxdataF_comp0 		=lte_ue_pdsch_vars->rxdataF_comp0;
  int **rxdataF_comp1 		=lte_ue_pdsch_vars->rxdataF_comp1[harq_pid][round];
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  int **dl_ch_rho_ext 		=lte_ue_pdsch_vars->dl_ch_rho_ext[harq_pid][round]; //for first stream
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  int **dl_ch_rho2_ext 		=lte_ue_pdsch_vars->dl_ch_rho2_ext;
  int **dl_ch_mag0            	= lte_ue_pdsch_vars->dl_ch_mag0;
  int **dl_ch_mag1            	= lte_ue_pdsch_vars->dl_ch_mag1;
  int **dl_ch_magb0           	= lte_ue_pdsch_vars->dl_ch_magb0;
  int **dl_ch_magb1           	= lte_ue_pdsch_vars->dl_ch_magb1;
  
  
  if (frame_parms->nb_antennas_rx>1) {
      
2819 2820 2821 2822 2823 2824
      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp0[0][symbol*frame_parms->N_RB_DL*12];  
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp0[1][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_0      = (__m128i *)&dl_ch_mag0[0][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_1      = (__m128i *)&dl_ch_mag0[1][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_0b     = (__m128i *)&dl_ch_magb0[0][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_1b     = (__m128i *)&dl_ch_magb0[1][symbol*frame_parms->N_RB_DL*12];  
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      // MRC on each re of rb, both on MF output and magnitude (for 16QAM/64QAM llr computation)
      for (i=0;i<nb_rb*3;i++) {
        rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
        dl_ch_mag128_0[i]    = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_0[i],1),_mm_srai_epi16(dl_ch_mag128_1[i],1));
        dl_ch_mag128_0b[i]   = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_0b[i],1),_mm_srai_epi16(dl_ch_mag128_1b[i],1));
      
	// print_shorts("mrc compens0:",&rxdataF_comp128_0[i]);
	// print_shorts("mrc mag128_0:",&dl_ch_mag128_0[i]);
	// print_shorts("mrc mag128_0b:",&dl_ch_mag128_0b[i]);
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      }    }
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   // if (rho) {
      rho128_0 = (__m128i *) &dl_ch_rho_ext[0][symbol*frame_parms->N_RB_DL*12];
      rho128_1 = (__m128i *) &dl_ch_rho_ext[1][symbol*frame_parms->N_RB_DL*12];
      for (i=0;i<nb_rb*3;i++) {
           //  print_shorts("mrc rho0:",&rho128_0[i]);
            //  print_shorts("mrc rho1:",&rho128_1[i]);
        rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));
      }
   //}


    if (dual_stream_UE == 1) {
      rho128_i0 = (__m128i *) &dl_ch_rho2_ext[0][symbol*frame_parms->N_RB_DL*12];
      rho128_i1 = (__m128i *) &dl_ch_rho2_ext[1][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_i0   = (__m128i *)&rxdataF_comp1[0][symbol*frame_parms->N_RB_DL*12];  
      rxdataF_comp128_i1   = (__m128i *)&rxdataF_comp1[1][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_i0      = (__m128i *)&dl_ch_mag1[0][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_i1      = (__m128i *)&dl_ch_mag1[1][symbol*frame_parms->N_RB_DL*12]; 
      dl_ch_mag128_i0b     = (__m128i *)&dl_ch_magb1[0][symbol*frame_parms->N_RB_DL*12];  
      dl_ch_mag128_i1b     = (__m128i *)&dl_ch_magb1[1][symbol*frame_parms->N_RB_DL*12];
      for (i=0;i<nb_rb*3;i++) {
        rxdataF_comp128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_i0[i],1),_mm_srai_epi16(rxdataF_comp128_i1[i],1));
        rho128_i0[i]           = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
            
        dl_ch_mag128_i0[i]    = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_i0[i],1),_mm_srai_epi16(dl_ch_mag128_i1[i],1));
        dl_ch_mag128_i0b[i]    = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_i0b[i],1),_mm_srai_epi16(dl_ch_mag128_i1b[i],1));
	
	//print_shorts("mrc compens1:",&rxdataF_comp128_i0[i]);
	//print_shorts("mrc mag128_i0:",&dl_ch_mag128_i0[i]);
	//print_shorts("mrc mag128_i0b:",&dl_ch_mag128_i0b[i]);
      }
    }
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  _mm_empty();
  _m_empty();
}



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void dlsch_scale_channel(int **dl_ch_estimates_ext,
                         LTE_DL_FRAME_PARMS *frame_parms,
                         LTE_UE_DLSCH_t **dlsch_ue,
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                         uint8_t symbol,
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                         unsigned short nb_rb)
{
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#if defined(__x86_64__)||defined(__i386__)
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  short rb, ch_amp;
  unsigned char aatx,aarx,pilots=0,symbol_mod;
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  __m128i *dl_ch128, ch_amp128;

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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
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    if (frame_parms->mode1_flag==1) // 10 out of 12 so don't reduce size
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      nb_rb=1+(5*nb_rb/6);
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    else
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      pilots=1;
  }

  // Determine scaling amplitude based the symbol
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ch_amp = ((pilots) ? (dlsch_ue[0]->sqrt_rho_b) : (dlsch_ue[0]->sqrt_rho_a));
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    LOG_D(PHY,"Scaling PDSCH Chest in OFDM symbol %d by %d\n",symbol_mod,ch_amp);
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  ch_amp128 = _mm_set1_epi16(ch_amp); // Q3.13

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 for (aatx=0;aatx<frame_parms->nb_antennas_tx_eNB;aatx++) {
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    for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++) {

      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
                
      for (rb=0;rb<nb_rb;rb++) {
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        dl_ch128[0] = _mm_mulhi_epi16(dl_ch128[0],ch_amp128);
        dl_ch128[0] = _mm_slli_epi16(dl_ch128[0],3);

        dl_ch128[1] = _mm_mulhi_epi16(dl_ch128[1],ch_amp128);
        dl_ch128[1] = _mm_slli_epi16(dl_ch128[1],3);

        if (pilots) {
          dl_ch128+=2;
        } else {
          dl_ch128[2] = _mm_mulhi_epi16(dl_ch128[2],ch_amp128);
          dl_ch128[2] = _mm_slli_epi16(dl_ch128[2],3);
          dl_ch128+=3;
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        }       
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      }                
    }
  }
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#elif defined(__arm__)

#endif
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}

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//compute average channel_level on each (TX,RX) antenna pair
void dlsch_channel_level(int **dl_ch_estimates_ext,
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                         LTE_DL_FRAME_PARMS *frame_parms,
                         int *avg,
                         uint8_t symbol,
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                         unsigned short nb_rb)
{
2945

2946
#if defined(__x86_64__)||defined(__i386__)
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  short rb;
  unsigned char aatx,aarx,nre=12,symbol_mod;
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  __m128i *dl_ch128,avg128D;

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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

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  for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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      //clear average level
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      avg128D = _mm_setzero_si128();
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      // 5 is always a symbol with no pilots for both normal and extended prefix

      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];

      for (rb=0;rb<nb_rb;rb++) {
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        //      printf("rb %d : ",rb);
        //      print_shorts("ch",&dl_ch128[0]);
        avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[0],dl_ch128[0]));
        avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[1],dl_ch128[1]));
        if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
          dl_ch128+=2;  
        }
        else {
          avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch128[2],dl_ch128[2]));
          dl_ch128+=3;  
        }
        /*
          if (rb==0) {
          print_shorts("dl_ch128",&dl_ch128[0]);
          print_shorts("dl_ch128",&dl_ch128[1]);
          print_shorts("dl_ch128",&dl_ch128[2]);
          }
        */
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      }

      if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
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        nre=8;
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      else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==1))
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        nre=10;
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      else
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        nre=12;
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      avg[(aatx<<1)+aarx] = (((int*)&avg128D)[0] + 
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                             ((int*)&avg128D)[1] + 
                             ((int*)&avg128D)[2] + 
                             ((int*)&avg128D)[3])/(nb_rb*nre);
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      //            printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
    }
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  _mm_empty();
  _m_empty();

3001
#elif defined(__arm__)
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  short rb;
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  unsigned char aatx,aarx,nre=12,symbol_mod;
  int32x4_t avg128D;
  int16x4_t *dl_ch128;
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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

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  for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      //clear average level
      avg128D = vdupq_n_s32(0);
      // 5 is always a symbol with no pilots for both normal and extended prefix
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      dl_ch128=(int16x4_t *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
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      for (rb=0; rb<nb_rb; rb++) {
        //  printf("rb %d : ",rb);
        //  print_shorts("ch",&dl_ch128[0]);
        avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[0],dl_ch128[0]));
        avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[1],dl_ch128[1]));
        avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[2],dl_ch128[2]));
        avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[3],dl_ch128[3]));
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        if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
          dl_ch128+=4;
        } else {
          avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[4],dl_ch128[4]));
          avg128D = vqaddq_s32(avg128D,vmull_s16(dl_ch128[5],dl_ch128[5]));
          dl_ch128+=6;
        }
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        /*
          if (rb==0) {
          print_shorts("dl_ch128",&dl_ch128[0]);
          print_shorts("dl_ch128",&dl_ch128[1]);
          print_shorts("dl_ch128",&dl_ch128[2]);
          }
        */
      }

      if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
        nre=8;
      else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==1))
        nre=10;
      else
        nre=12;

      avg[(aatx<<1)+aarx] = (((int32_t*)&avg128D)[0] +
                             ((int32_t*)&avg128D)[1] +
                             ((int32_t*)&avg128D)[2] +
                             ((int32_t*)&avg128D)[3])/(nb_rb*nre);

      //            printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
    }


3059
#endif
3060 3061
}

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3062 3063
//compute average channel_level of effective (precoded) channel

3064
//compute average channel_level of effective (precoded) channel
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3065 3066
void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
                              LTE_DL_FRAME_PARMS *frame_parms,
3067 3068 3069
			      unsigned char *pmi_ext,
                              int *avg_0,
			      int *avg_1,
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                              uint8_t symbol,
                              unsigned short nb_rb,
                              MIMO_mode_t mimo_mode){

3074
#if defined(__x86_64__)||defined(__i386__)
3075

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3077 3078
  short rb;
  unsigned char aarx,nre=12,symbol_mod;
3079
  __m128i *dl_ch0_128,*dl_ch1_128, dl_ch0_128_tmp, dl_ch1_128_tmp, avg_0_128D, avg_1_128D;
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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

  //clear average level
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  avg_0[0] = 0;
  avg_0[1] = 0;
  avg_1[0] = 0;
  avg_1[1] = 0;
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  // 5 is always a symbol with no pilots for both normal and extended prefix

  if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
    nre=8;
  else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==1))
    nre=10;
  else
    nre=12;

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  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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    dl_ch0_128 = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128 = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
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    avg_0_128D = _mm_setzero_si128();
    avg_1_128D = _mm_setzero_si128();
3103
    for (rb=0; rb<nb_rb; rb++) {
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              // printf("rb %d : \n",rb);
              // print_shorts("ch0\n",&dl_ch0_128[0]);
	       //print_shorts("ch1\n",&dl_ch1_128[0]);
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      dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[0]);
      dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[0]);

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      if (mimo_mode==LARGE_CDD) 
        prec2A_TM3_128(&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1)
        prec2A_TM4_128(0,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj)
        prec2A_TM4_128(1,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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3116 3117
      else if (mimo_mode==DUALSTREAM_PUSCH_PRECODING)
        prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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      //      mmtmpD0 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);          
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      avg_0_128D = _mm_add_epi32(avg_0_128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
      
      avg_1_128D = _mm_add_epi32(avg_1_128D,_mm_madd_epi16(dl_ch1_128_tmp,dl_ch1_128_tmp));
      
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      dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[1]);
3125
      dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[1]);
3126

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      if (mimo_mode==LARGE_CDD) 
        prec2A_TM3_128(&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1)
        prec2A_TM4_128(0,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj)
        prec2A_TM4_128(1,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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3133 3134
      else if (mimo_mode==DUALSTREAM_PUSCH_PRECODING)
        prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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3136
      //      mmtmpD1 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);          
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      avg_0_128D = _mm_add_epi32(avg_0_128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
      
      avg_1_128D = _mm_add_epi32(avg_1_128D,_mm_madd_epi16(dl_ch1_128_tmp,dl_ch1_128_tmp));
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      if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
3142 3143
        dl_ch0_128+=2;  
        dl_ch1_128+=2;
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      }
      else {
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        dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[2]);
        dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[2]);          

        if (mimo_mode==LARGE_CDD) 
          prec2A_TM3_128(&dl_ch0_128_tmp,&dl_ch1_128_tmp);
        else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1)
          prec2A_TM4_128(0,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
        else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj)
          prec2A_TM4_128(1,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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	else if (mimo_mode==DUALSTREAM_PUSCH_PRECODING)
	  prec2A_TM4_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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        //      mmtmpD2 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
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        avg_0_128D = _mm_add_epi32(avg_0_128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
      
	avg_1_128D = _mm_add_epi32(avg_1_128D,_mm_madd_epi16(dl_ch1_128_tmp,dl_ch1_128_tmp));
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3163 3164
        dl_ch0_128+=3;  
        dl_ch1_128+=3;
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      }          
    }
3167

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    avg_0[aarx] = (((int*)&avg_0_128D)[0])/(nb_rb*nre) +
      (((int*)&avg_0_128D)[1])/(nb_rb*nre) +
      (((int*)&avg_0_128D)[2])/(nb_rb*nre) +
      (((int*)&avg_0_128D)[3])/(nb_rb*nre);
    //  printf("From Chan_level aver stream 0 %d =%d\n", aarx, avg_0[aarx]);
      
    avg_1[aarx] = (((int*)&avg_1_128D)[0])/(nb_rb*nre) +
      (((int*)&avg_1_128D)[1])/(nb_rb*nre) +
      (((int*)&avg_1_128D)[2])/(nb_rb*nre) +
      (((int*)&avg_1_128D)[3])/(nb_rb*nre);   
    //  printf("From Chan_level aver stream 1 %d =%d\n", aarx, avg_1[aarx]);
3179
  }
3180

3181
  
3182 3183
  avg_0[0] = avg_0[0] + avg_0[1];
  avg_1[0] = avg_1[0] + avg_1[1];
3184 3185 3186

  _mm_empty();
  _m_empty();
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#elif defined(__arm__)

#endif
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}

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/*void dlsch_channel_level_TM34(int **dl_ch_estimates_ext,
                              LTE_DL_FRAME_PARMS *frame_parms,
                              int *avg,
                              uint8_t symbol,
                              unsigned short nb_rb,
                              MIMO_mode_t mimo_mode){

#if defined(__x86_64__)||defined(__i386__)


  short rb;
  unsigned char aarx,nre=12,symbol_mod;
  __m128i *dl_ch0_128,*dl_ch1_128, dl_ch0_128_tmp, dl_ch1_128_tmp,avg128D;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

  //clear average level
  avg128D = _mm_setzero_si128();
  avg[0] = 0;
  avg[1] = 0;
  // 5 is always a symbol with no pilots for both normal and extended prefix

  if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
    nre=8;
  else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==1))
    nre=10;
  else
    nre=12;

  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
    dl_ch0_128 = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128 = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];

    for (rb=0; rb<nb_rb; rb++) {

      dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[0]);
      dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[0]);

      if (mimo_mode==LARGE_CDD) 
        prec2A_TM3_128(&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1)
        prec2A_TM4_128(0,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj)
        prec2A_TM4_128(1,&dl_ch0_128_tmp,&dl_ch1_128_tmp);

      //      mmtmpD0 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);          
      avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));

      dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[1]);
      dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[1]);

      if (mimo_mode==LARGE_CDD) 
        prec2A_TM3_128(&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1)
        prec2A_TM4_128(0,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
      else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj)
        prec2A_TM4_128(1,&dl_ch0_128_tmp,&dl_ch1_128_tmp);

      //      mmtmpD1 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);          
      avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));

      if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
        dl_ch0_128+=2;  
        dl_ch1_128+=2;
      }
      else {
        dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[2]);
        dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[2]);          

        if (mimo_mode==LARGE_CDD) 
          prec2A_TM3_128(&dl_ch0_128_tmp,&dl_ch1_128_tmp);
        else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODING1)
          prec2A_TM4_128(0,&dl_ch0_128_tmp,&dl_ch1_128_tmp);
        else if (mimo_mode==DUALSTREAM_UNIFORM_PRECODINGj)
          prec2A_TM4_128(1,&dl_ch0_128_tmp,&dl_ch1_128_tmp);

        //      mmtmpD2 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
        avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));

        dl_ch0_128+=3;  
        dl_ch1_128+=3;
      }          
    }

    avg[aarx] = (((int*)&avg128D)[0])/(nb_rb*nre) +
      (((int*)&avg128D)[1])/(nb_rb*nre) +
      (((int*)&avg128D)[2])/(nb_rb*nre) +
      (((int*)&avg128D)[3])/(nb_rb*nre);
  }

  // choose maximum of the 2 effective channels
  avg[0] = cmax(avg[0],avg[1]);

  _mm_empty();
  _m_empty();

#elif defined(__arm__)

#endif
}*/

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//compute average channel_level of effective (precoded) channel
void dlsch_channel_level_TM56(int **dl_ch_estimates_ext,
3298 3299 3300
                              LTE_DL_FRAME_PARMS *frame_parms,
                              unsigned char *pmi_ext,
                              int *avg,
3301
                              uint8_t symbol,
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                              unsigned short nb_rb)
{
3304

3305
#if defined(__x86_64__)||defined(__i386__)
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  short rb;
  unsigned char aarx,nre=12,symbol_mod;
3309
  __m128i *dl_ch0_128,*dl_ch1_128, dl_ch0_128_tmp, dl_ch1_128_tmp,avg128D;
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  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;

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  //clear average level
  avg128D = _mm_setzero_si128();
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  avg[0] = 0;
  avg[1] = 0;
  // 5 is always a symbol with no pilots for both normal and extended prefix

  if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0))
    nre=8;
  else if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==1))
    nre=10;
  else
    nre=12;

3326
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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    dl_ch0_128 = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch1_128 = (__m128i *)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
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3330
    for (rb=0; rb<nb_rb; rb++) {
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      dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[0]);
      dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[0]);
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      prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
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      //      mmtmpD0 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
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      avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
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      dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[1]);
3340
      dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[1]);
3341

3342
      prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
3343
      //      mmtmpD1 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
3344
      avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
3345 3346

      if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->mode1_flag==0)) {
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        dl_ch0_128+=2;  
        dl_ch1_128+=2;
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      }
      else {
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        dl_ch0_128_tmp = _mm_load_si128(&dl_ch0_128[2]);
        dl_ch1_128_tmp = _mm_load_si128(&dl_ch1_128[2]);          
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        prec2A_TM56_128(pmi_ext[rb],&dl_ch0_128_tmp,&dl_ch1_128_tmp);
        //      mmtmpD2 = _mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp);
        avg128D = _mm_add_epi32(avg128D,_mm_madd_epi16(dl_ch0_128_tmp,dl_ch0_128_tmp));
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        dl_ch0_128+=3;  
        dl_ch1_128+=3;
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      }          
    }
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    avg[aarx] = (((int*)&avg128D)[0])/(nb_rb*nre) +
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      (((int*)&avg128D)[1])/(nb_rb*nre) +
      (((int*)&avg128D)[2])/(nb_rb*nre) +
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      (((int*)&avg128D)[3])/(nb_rb*nre);
  }
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  // choose maximum of the 2 effective channels
  avg[0] = cmax(avg[0],avg[1]);

  _mm_empty();
  _m_empty();
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#elif defined(__arm__)


#endif
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}
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void dlsch_alamouti(LTE_DL_FRAME_PARMS *frame_parms,
                    int **rxdataF_comp,
                    int **dl_ch_mag,
                    int **dl_ch_magb,
                    unsigned char symbol,
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                    unsigned short nb_rb)
{
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3390
#if defined(__x86_64__)||defined(__i386__)
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  short *rxF0,*rxF1;
  __m128i *ch_mag0,*ch_mag1,*ch_mag0b,*ch_mag1b, amp, *rxF0_128;
  unsigned char rb,re;
  int jj = (symbol*frame_parms->N_RB_DL*12);
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  uint8_t symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
  uint8_t pilots = ((symbol_mod==0)||(symbol_mod==(4-frame_parms->Ncp))) ? 1 : 0;
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  rxF0_128 = (__m128i*) &rxdataF_comp[0][jj];

  amp = _mm_set1_epi16(ONE_OVER_SQRT2_Q15);

  //    printf("Doing alamouti!\n");
  rxF0     = (short*)&rxdataF_comp[0][jj];  //tx antenna 0  h0*y
  rxF1     = (short*)&rxdataF_comp[2][jj];  //tx antenna 1  h1*y
  ch_mag0 = (__m128i *)&dl_ch_mag[0][jj];
  ch_mag1 = (__m128i *)&dl_ch_mag[2][jj];
  ch_mag0b = (__m128i *)&dl_ch_magb[0][jj];
  ch_mag1b = (__m128i *)&dl_ch_magb[2][jj];
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  for (rb=0; rb<nb_rb; rb++) {
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    for (re=0; re<((pilots==0)?12:8); re+=2) {
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      // Alamouti RX combining
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      //      printf("Alamouti: symbol %d, rb %d, re %d: rxF0 (%d,%d,%d,%d), rxF1 (%d,%d,%d,%d)\n",symbol,rb,re,rxF0[0],rxF0[1],rxF0[2],rxF0[3],rxF1[0],rxF1[1],rxF1[2],rxF1[3]);
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      rxF0[0] = rxF0[0] + rxF1[2];
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      rxF0[1] = rxF0[1] - rxF1[3]; 
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      rxF0[2] = rxF0[2] - rxF1[0];
      rxF0[3] = rxF0[3] + rxF1[1];
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      //      printf("Alamouti: rxF0 after (%d,%d,%d,%d)\n",rxF0[0],rxF0[1],rxF0[2],rxF0[3]);
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      rxF0+=4;
      rxF1+=4;

    }

    // compute levels for 16QAM or 64 QAM llr unit
    ch_mag0[0] = _mm_adds_epi16(ch_mag0[0],ch_mag1[0]);
    ch_mag0[1] = _mm_adds_epi16(ch_mag0[1],ch_mag1[1]);

    ch_mag0b[0] = _mm_adds_epi16(ch_mag0b[0],ch_mag1b[0]);
    ch_mag0b[1] = _mm_adds_epi16(ch_mag0b[1],ch_mag1b[1]);

    // account for 1/sqrt(2) scaling at transmission
    ch_mag0[0] = _mm_srai_epi16(ch_mag0[0],1);
    ch_mag0[1] = _mm_srai_epi16(ch_mag0[1],1);
    ch_mag0b[0] = _mm_srai_epi16(ch_mag0b[0],1);
    ch_mag0b[1] = _mm_srai_epi16(ch_mag0b[1],1);

    rxF0_128[0] = _mm_mulhi_epi16(rxF0_128[0],amp);
    rxF0_128[0] = _mm_slli_epi16(rxF0_128[0],1);
    rxF0_128[1] = _mm_mulhi_epi16(rxF0_128[1],amp);
    rxF0_128[1] = _mm_slli_epi16(rxF0_128[1],1);

    if (pilots==0) {
      ch_mag0[2] = _mm_adds_epi16(ch_mag0[2],ch_mag1[2]);
      ch_mag0b[2] = _mm_adds_epi16(ch_mag0b[2],ch_mag1b[2]);

      ch_mag0[2] = _mm_srai_epi16(ch_mag0[2],1);
      ch_mag0b[2] = _mm_srai_epi16(ch_mag0b[2],1);

      rxF0_128[2] = _mm_mulhi_epi16(rxF0_128[2],amp);
      rxF0_128[2] = _mm_slli_epi16(rxF0_128[2],1);

      ch_mag0+=3;
      ch_mag1+=3;
      ch_mag0b+=3;
      ch_mag1b+=3;
      rxF0_128+=3;
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    } else {
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      ch_mag0+=2;
      ch_mag1+=2;
      ch_mag0b+=2;
      ch_mag1b+=2;
      rxF0_128+=2;
    }
  }

  _mm_empty();
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  _m_empty();
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3474
#elif defined(__arm__)
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3476
#endif
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}

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//==============================================================================================
// Extraction functions
//==============================================================================================

unsigned short dlsch_extract_rbs_single(int **rxdataF,
                                        int **dl_ch_estimates,
                                        int **rxdataF_ext,
                                        int **dl_ch_estimates_ext,
                                        unsigned short pmi,
                                        unsigned char *pmi_ext,
                                        unsigned int *rb_alloc,
                                        unsigned char symbol,
                                        unsigned char subframe,
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                                        uint32_t high_speed_flag,
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                                        LTE_DL_FRAME_PARMS *frame_parms) {



  unsigned short rb,nb_rb=0;
  unsigned char rb_alloc_ind;
  unsigned char i,aarx,l,nsymb,skip_half=0,sss_symb,pss_symb=0;
  int *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;



  unsigned char symbol_mod,pilots=0,j=0,poffset=0;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
  pilots = ((symbol_mod==0)||(symbol_mod==(4-frame_parms->Ncp))) ? 1 : 0;
  l=symbol;
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3510
  nsymb = (frame_parms->Ncp==NORMAL) ? 14:12;
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3512
  if (frame_parms->frame_type == TDD) {  // TDD
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    sss_symb = nsymb-1;
    pss_symb = 2;
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  } else {
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    sss_symb = (nsymb>>1)-2;
    pss_symb = (nsymb>>1)-1;
  }
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  if (symbol_mod==(4-frame_parms->Ncp))
    poffset=3;

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  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
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    if (high_speed_flag == 1)
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
    else
      dl_ch0     = &dl_ch_estimates[aarx][5];
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    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];
    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];
3534

3535
    if ((frame_parms->N_RB_DL&1) == 0)  // even number of RBs
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3536
      
3537
      for (rb=0;rb<frame_parms->N_RB_DL;rb++) {
3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548
        
        if (rb < 32)
          rb_alloc_ind = (rb_alloc[0]>>rb) & 1;
        else if (rb < 64)
          rb_alloc_ind = (rb_alloc[1]>>(rb-32)) & 1;
        else if (rb < 96)
          rb_alloc_ind = (rb_alloc[2]>>(rb-64)) & 1;
        else if (rb < 100)
          rb_alloc_ind = (rb_alloc[3]>>(rb-96)) & 1;
        else
          rb_alloc_ind = 0;
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3550 3551 3552
	if (rb_alloc_ind == 1)
          nb_rb++;

3553 3554 3555
        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];
3556
          //dl_ch0++;
3557
        }
3558

3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583
        // PBCH
        if ((subframe==0) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l>=nsymb>>1) && (l<((nsymb>>1) + 4))) {
          rb_alloc_ind = 0;
        }

        //SSS
        if (((subframe==0)||(subframe==5)) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==sss_symb) ) {
          rb_alloc_ind = 0;
        }


        if (frame_parms->frame_type == FDD) {
          //PSS
          if (((subframe==0)||(subframe==5)) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb) ) {
            rb_alloc_ind = 0;
          }
        }

        if ((frame_parms->frame_type == TDD) &&
            (subframe==6)) { //TDD Subframe 6
          if ((rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb) ) {
            rb_alloc_ind = 0;
          }
        }

3584 3585 3586
        if (rb_alloc_ind==1) {
          *pmi_ext = (pmi>>((rb>>2)<<1))&3;
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int));
3587 3588

          /*
3589 3590 3591 3592
	    printf("rb %d\n",rb);
	    for (i=0;i<12;i++)
	    printf("(%d %d)",((short *)dl_ch0)[i<<1],((short*)dl_ch0)[1+(i<<1)]);
	    printf("\n");
3593 3594
          */
          if (pilots==0) {
3595
            for (i=0; i<12; i++) {
3596
              rxF_ext[i]=rxF[i];
3597
              /*
3598 3599
		printf("%d : (%d,%d)\n",(rxF+i-&rxdataF[aarx][( (symbol*(frame_parms->ofdm_symbol_size)))]),
		((short*)&rxF[i])[0],((short*)&rxF[i])[1]);*/
3600
            }
3601

3602 3603
            dl_ch0_ext+=12;
            rxF_ext+=12;
3604
          } else {
3605
            j=0;
3606 3607

            for (i=0; i<12; i++) {
3608 3609 3610
              if ((i!=(frame_parms->nushift+poffset)) &&
                  (i!=((frame_parms->nushift+poffset+6)%12))) {
                rxF_ext[j]=rxF[i];
3611
                //            printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
3612
                dl_ch0_ext[j++]=dl_ch0[i];
3613

3614 3615
              }
            }
3616

3617 3618 3619
            dl_ch0_ext+=10;
            rxF_ext+=10;
          }
3620

3621

3622
        }
3623

3624 3625
        dl_ch0+=12;
        rxF+=12;
3626 3627 3628

      }
    else {  // Odd number of RBs
3629
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {
3630 3631 3632
#ifdef DEBUG_DLSCH_DEMOD
	printf("dlch_ext %d\n",dl_ch0_ext-&dl_ch_estimates_ext[aarx][0]);
#endif
3633
        skip_half=0;
3634

3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645
        if (rb < 32)
          rb_alloc_ind = (rb_alloc[0]>>rb) & 1;
        else if (rb < 64)
          rb_alloc_ind = (rb_alloc[1]>>(rb-32)) & 1;
        else if (rb < 96)
          rb_alloc_ind = (rb_alloc[2]>>(rb-64)) & 1;
        else if (rb < 100)
          rb_alloc_ind = (rb_alloc[3]>>(rb-96)) & 1;
        else
          rb_alloc_ind = 0;

3646 3647
	if (rb_alloc_ind == 1)
	  nb_rb++;
3648

3649 3650 3651 3652 3653

        // PBCH
        if ((subframe==0) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4))) {
          rb_alloc_ind = 0;
        }
3654

3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680
        //PBCH subframe 0, symbols nsymb>>1 ... nsymb>>1 + 3
        if ((subframe==0) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4)))
          skip_half=1;
        else if ((subframe==0) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4)))
          skip_half=2;
        
        //SSS

        if (((subframe==0)||(subframe==5)) && 
            (rb>((frame_parms->N_RB_DL>>1)-3)) && 
            (rb<((frame_parms->N_RB_DL>>1)+3)) && 
            (l==sss_symb) ) {
          rb_alloc_ind = 0;
        }
        //SSS 
        if (((subframe==0)||(subframe==5)) && 
            (rb==((frame_parms->N_RB_DL>>1)-3)) && 
            (l==sss_symb))
          skip_half=1;
        else if (((subframe==0)||(subframe==5)) && 
                 (rb==((frame_parms->N_RB_DL>>1)+3)) && 
                 (l==sss_symb))
          skip_half=2;

        //PSS in subframe 0/5 if FDD
        if (frame_parms->frame_type == FDD) {  //FDD
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3682 3683 3684 3685
          if (((subframe==0)||(subframe==5)) && 
	      (rb>((frame_parms->N_RB_DL>>1)-3)) && 
	      (rb<((frame_parms->N_RB_DL>>1)+3)) && 
	      (l==pss_symb) ) {
3686 3687
            rb_alloc_ind = 0;
          }
3688

3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708
          if (((subframe==0)||(subframe==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==pss_symb))
            skip_half=1;
          else if (((subframe==0)||(subframe==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb))
            skip_half=2;
        }
        
        if ((frame_parms->frame_type == TDD) &&
            (subframe==6)){  //TDD Subframe 6
          if ((rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb) ) {
            rb_alloc_ind = 0;
          }
          if ((rb==((frame_parms->N_RB_DL>>1)-3)) && (l==pss_symb))
            skip_half=1;
          else if ((rb==((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb))
            skip_half=2;
        }


        if (rb_alloc_ind==1) {

3709 3710 3711
#ifdef DEBUG_DLSCH_DEMOD
	  printf("rb %d/symbol %d (skip_half %d)\n",rb,l,skip_half);
#endif
3712
          if (pilots==0) {
3713
	    //	    printf("Extracting w/o pilots (symbol %d, rb %d, skip_half %d)\n",l,rb,skip_half);
3714 3715
            if (skip_half==1) {
              memcpy(dl_ch0_ext,dl_ch0,6*sizeof(int));
3716

3717 3718 3719 3720 3721 3722
              for (i=0; i<6; i++) {
	        rxF_ext[i]=rxF[i];
#ifdef DEBUG_DLSCH_DEMOD
		printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
	      }
3723 3724
              dl_ch0_ext+=6;
              rxF_ext+=6;
3725
            } else if (skip_half==2) {
3726
              memcpy(dl_ch0_ext,dl_ch0+6,6*sizeof(int));
3727

3728
              for (i=0; i<6; i++) {
3729
                rxF_ext[i]=rxF[(i+6)];
3730 3731 3732 3733
#ifdef DEBUG_DLSCH_DEMOD
		printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
	      }
3734 3735
              dl_ch0_ext+=6;
              rxF_ext+=6;
3736
            } else {
3737
              memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int));
3738

3739
              for (i=0; i<12; i++) {
3740
                rxF_ext[i]=rxF[i];
3741 3742 3743 3744
#ifdef DEBUG_DLSCH_DEMOD
                printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
	      }
3745 3746 3747
              dl_ch0_ext+=12;
              rxF_ext+=12;
            }
3748
          } else {
3749
	    //	    printf("Extracting with pilots (symbol %d, rb %d, skip_half %d)\n",l,rb,skip_half);
3750
            j=0;
3751

3752
            if (skip_half==1) {
3753
              for (i=0; i<6; i++) {
3754 3755
                if (i!=((frame_parms->nushift+poffset)%6)) {
                  rxF_ext[j]=rxF[i];
3756 3757 3758
#ifdef DEBUG_DLSCH_DEMOD
                  printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
3759 3760 3761
                  dl_ch0_ext[j++]=dl_ch0[i];
                }
              }
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3762
	      rxF_ext+=5;
3763
              dl_ch0_ext+=5;
3764 3765
            } else if (skip_half==2) {
              for (i=0; i<6; i++) {
3766 3767
                if (i!=((frame_parms->nushift+poffset)%6)) {
                  rxF_ext[j]=rxF[(i+6)];
3768 3769 3770
#ifdef DEBUG_DLSCH_DEMOD
		  printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
3771 3772 3773
                  dl_ch0_ext[j++]=dl_ch0[i+6];
                }
              }
3774

3775 3776
              dl_ch0_ext+=5;
              rxF_ext+=5;
3777 3778
            } else {
              for (i=0; i<12; i++) {
3779 3780 3781
                if ((i!=(frame_parms->nushift+poffset)) &&
                    (i!=((frame_parms->nushift+poffset+6)%12))) {
                  rxF_ext[j]=rxF[i];
3782 3783 3784
#ifdef DEBUG_DLSCH_DEMOD
		  printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
3785
                  dl_ch0_ext[j++]=dl_ch0[i];
3786

3787 3788
                }
              }
3789

3790 3791 3792 3793
              dl_ch0_ext+=10;
              rxF_ext+=10;
            }
          }
3794
        }
3795 3796
        dl_ch0+=12;
        rxF+=12;
3797 3798 3799 3800 3801
      } // first half loop


      // Do middle RB (around DC)
      if (rb < 32)
3802
        rb_alloc_ind = (rb_alloc[0]>>rb) & 1;
3803
      else if (rb < 64)
3804
        rb_alloc_ind = (rb_alloc[1]>>(rb-32)) & 1;
3805
      else if (rb < 96)
3806
        rb_alloc_ind = (rb_alloc[2]>>(rb-64)) & 1;
3807
      else if (rb < 100)
3808
        rb_alloc_ind = (rb_alloc[3]>>(rb-96)) & 1;
3809
      else
3810
        rb_alloc_ind = 0;
3811

3812

3813 3814
      if (rb_alloc_ind == 1)
	nb_rb++;
3815 3816

      // PBCH
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3818 3819 3820
      if ((subframe==0) && 
	  (l>=(nsymb>>1)) && 
	  (l<((nsymb>>1) + 4))) {
3821
        rb_alloc_ind = 0;
3822
      }
3823

3824
      //SSS
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3825
      if (((subframe==0)||(subframe==5)) && (l==sss_symb) ) {
3826
        rb_alloc_ind = 0;
3827
      }
3828

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3829
      if (frame_parms->frame_type == FDD) {
3830
        //PSS
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3831
        if (((subframe==0)||(subframe==5)) && (l==pss_symb) ) {
3832 3833
          rb_alloc_ind = 0;
        }
3834 3835
      }

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3836
      //PSS
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3837
      if ((frame_parms->frame_type == TDD) &&
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3838 3839 3840
          (subframe==6) &&
	  (l==pss_symb) ) {
	rb_alloc_ind = 0;
3841
      }
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3842
      
3843 3844

      //  printf("dlch_ext %d\n",dl_ch0_ext-&dl_ch_estimates_ext[aarx][0]);
3845 3846
      //      printf("DC rb %d (%p)\n",rb,rxF);
      if (rb_alloc_ind==1) {
3847 3848 3849
#ifdef DEBUG_DLSCH_DEMOD
	printf("rb %d/symbol %d (skip_half %d)\n",rb,l,skip_half);
#endif
3850
        if (pilots==0) {
3851
          for (i=0; i<6; i++) {
3852 3853 3854
            dl_ch0_ext[i]=dl_ch0[i];
            rxF_ext[i]=rxF[i];
          }
3855

3856
          rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];
3857 3858

          for (; i<12; i++) {
3859 3860 3861
            dl_ch0_ext[i]=dl_ch0[i];
            rxF_ext[i]=rxF[(1+i-6)];
          }
3862

3863 3864
          dl_ch0_ext+=12;
          rxF_ext+=12;
3865
        } else { // pilots==1
3866
          j=0;
3867 3868

          for (i=0; i<6; i++) {
3869 3870 3871
            if (i!=((frame_parms->nushift+poffset)%6)) {
              dl_ch0_ext[j]=dl_ch0[i];
              rxF_ext[j++]=rxF[i];
3872 3873 3874
#ifdef DEBUG_DLSCH_DEMOD
              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
#endif
3875 3876
            }
          }
3877

3878
          rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];
3879 3880

          for (; i<12; i++) {
3881 3882 3883
            if (i!=((frame_parms->nushift+6+poffset)%12)) {
              dl_ch0_ext[j]=dl_ch0[i];
              rxF_ext[j++]=rxF[(1+i-6)];
3884 3885 3886
#ifdef DEBUG_DLSCH_DEMOD
              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
#endif           
3887 3888
            }
          }
3889

3890 3891 3892
          dl_ch0_ext+=10;
          rxF_ext+=10;
        } // symbol_mod==0
3893 3894
      } // rballoc==1
      else {
3895
        rxF       = &rxdataF[aarx][((symbol*(frame_parms->ofdm_symbol_size)))];
3896
      }
3897

3898 3899 3900
      dl_ch0+=12;
      rxF+=7;
      rb++;
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3901
     
3902
      for (;rb<frame_parms->N_RB_DL;rb++) {
3903 3904 3905
        //      printf("dlch_ext %d\n",dl_ch0_ext-&dl_ch_estimates_ext[aarx][0]);       
        //      printf("rb %d (%p)\n",rb,rxF);
        skip_half=0;
3906

3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917
        if (rb < 32)
          rb_alloc_ind = (rb_alloc[0]>>rb) & 1;
        else if (rb < 64)
          rb_alloc_ind = (rb_alloc[1]>>(rb-32)) & 1;
        else if (rb < 96)
          rb_alloc_ind = (rb_alloc[2]>>(rb-64)) & 1;
        else if (rb < 100)
          rb_alloc_ind = (rb_alloc[3]>>(rb-96)) & 1;
        else
          rb_alloc_ind = 0;

3918 3919
	if (rb_alloc_ind == 1)
	  nb_rb++;
3920 3921 3922 3923 3924 3925 3926 3927 3928 3929

        // PBCH
        if ((subframe==0) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l>=nsymb>>1) && (l<((nsymb>>1) + 4))) {
          rb_alloc_ind = 0;
        }
        //PBCH subframe 0, symbols nsymb>>1 ... nsymb>>1 + 3
        if ((subframe==0) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4)))
          skip_half=1;
        else if ((subframe==0) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4)))
          skip_half=2;
3930

3931 3932 3933 3934
        //SSS
        if (((subframe==0)||(subframe==5)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==sss_symb) ) {
          rb_alloc_ind = 0;
        }
3935
        //SSS
3936 3937 3938 3939 3940 3941 3942 3943 3944
        if (((subframe==0)||(subframe==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==sss_symb))
          skip_half=1;
        else if (((subframe==0)||(subframe==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==sss_symb))
          skip_half=2;
        if (frame_parms->frame_type == FDD) {
          //PSS
          if (((subframe==0)||(subframe==5)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb) ) {
            rb_alloc_ind = 0;
          }
3945 3946

          //PSS
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3947

3948 3949 3950 3951 3952 3953 3954
          if (((subframe==0)||(subframe==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==pss_symb))
            skip_half=1;
          else if (((subframe==0)||(subframe==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb))
            skip_half=2;
        }

        if ((frame_parms->frame_type == TDD) &&
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3955

3956
            (subframe==6)) { //TDD Subframe 6
3957 3958 3959
          if ((rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb) ) {
            rb_alloc_ind = 0;
          }
3960

3961 3962 3963 3964 3965
          if ((rb==((frame_parms->N_RB_DL>>1)-3)) && (l==pss_symb))
            skip_half=1;
          else if ((rb==((frame_parms->N_RB_DL>>1)+3)) && (l==pss_symb))
            skip_half=2;
        }
3966

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3967 3968


3969
        if (rb_alloc_ind==1) {
3970 3971 3972
#ifdef DEBUG_DLSCH_DEMOD	 
	  printf("rb %d/symbol %d (skip_half %d)\n",rb,l,skip_half);
#endif
3973
          /*
3974
	    printf("rb %d\n",rb);
3975 3976 3977 3978 3979
            for (i=0;i<12;i++)
            printf("(%d %d)",((short *)dl_ch0)[i<<1],((short*)dl_ch0)[1+(i<<1)]);
            printf("\n");
          */
          if (pilots==0) {
3980
	    //	    printf("Extracting w/o pilots (symbol %d, rb %d, skip_half %d)\n",l,rb,skip_half);
3981 3982
            if (skip_half==1) {
              memcpy(dl_ch0_ext,dl_ch0,6*sizeof(int));
3983

3984
              for (i=0; i<6; i++) {
3985
                rxF_ext[i]=rxF[i];
3986 3987 3988 3989
#ifdef DEBUG_DLSCH_DEMOD	 
		printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
	      }
3990 3991 3992
              dl_ch0_ext+=6;
              rxF_ext+=6;

3993
            } else if (skip_half==2) {
3994
              memcpy(dl_ch0_ext,dl_ch0+6,6*sizeof(int));
3995

3996
              for (i=0; i<6; i++) {
3997
                rxF_ext[i]=rxF[(i+6)];
3998 3999 4000 4001
#ifdef DEBUG_DLSCH_DEMOD
		printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
	      }
4002 4003 4004
              dl_ch0_ext+=6;
              rxF_ext+=6;

4005
            } else {
4006
              memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int));
4007

4008
              for (i=0; i<12; i++) {
4009
                rxF_ext[i]=rxF[i];
4010 4011 4012 4013
#ifdef DEBUG_DLSCH_DEMOD
		printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
	      }
4014 4015 4016
              dl_ch0_ext+=12;
              rxF_ext+=12;
            }
4017
          } else {
4018
	    //	    printf("Extracting with pilots (symbol %d, rb %d, skip_half %d)\n",l,rb,skip_half);
4019
            j=0;
4020

4021
            if (skip_half==1) {
4022
              for (i=0; i<6; i++) {
4023 4024
                if (i!=((frame_parms->nushift+poffset)%6)) {
                  rxF_ext[j]=rxF[i];
4025 4026 4027
#ifdef DEBUG_DLSCH_DEMOD
		  printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
4028 4029 4030
                  dl_ch0_ext[j++]=dl_ch0[i];
                }
              }
4031

4032 4033
              dl_ch0_ext+=5;
              rxF_ext+=5;
4034 4035
            } else if (skip_half==2) {
              for (i=0; i<6; i++) {
4036 4037
                if (i!=((frame_parms->nushift+poffset)%6)) {
                  rxF_ext[j]=rxF[(i+6)];
4038 4039 4040
#ifdef DEBUG_DLSCH_DEMOD
		  printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
4041 4042 4043
                  dl_ch0_ext[j++]=dl_ch0[i+6];
                }
              }
4044

4045 4046
              dl_ch0_ext+=5;
              rxF_ext+=5;
4047 4048
            } else {
              for (i=0; i<12; i++) {
4049 4050 4051
                if ((i!=(frame_parms->nushift+poffset)) &&
                    (i!=((frame_parms->nushift+poffset+6)%12))) {
                  rxF_ext[j]=rxF[i];
4052 4053 4054
#ifdef DEBUG_DLSCH_DEMOD
		  printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
4055 4056 4057 4058 4059 4060 4061 4062
                  dl_ch0_ext[j++]=dl_ch0[i];
                }
              }
              dl_ch0_ext+=10;
              rxF_ext+=10;
            }
          } // pilots=0
        }
4063

4064 4065
        dl_ch0+=12;
        rxF+=12;
4066 4067 4068
      }
    }
  }
4069
  
4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082

  return(nb_rb/frame_parms->nb_antennas_rx);
}

unsigned short dlsch_extract_rbs_dual(int **rxdataF,
                                      int **dl_ch_estimates,
                                      int **rxdataF_ext,
                                      int **dl_ch_estimates_ext,
                                      unsigned short pmi,
                                      unsigned char *pmi_ext,
                                      unsigned int *rb_alloc,
                                      unsigned char symbol,
                                      unsigned char subframe,
4083
                                      uint32_t high_speed_flag,
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4084 4085
                                      LTE_DL_FRAME_PARMS *frame_parms,
				      MIMO_mode_t mimo_mode) {
4086
    
4087 4088 4089 4090 4091 4092
  int prb,nb_rb=0;
  int prb_off,prb_off2;
  int rb_alloc_ind,skip_half=0,sss_symb,pss_symb=0,nsymb,l;
  int i,aarx;
  int32_t *dl_ch0,*dl_ch0p,*dl_ch0_ext,*dl_ch1,*dl_ch1p,*dl_ch1_ext,*rxF,*rxF_ext;
  int symbol_mod,pilots=0,j=0;
4093
  unsigned char *pmi_loc;
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4094
  
4095 4096 4097 4098 4099
  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
  //  printf("extract_rbs: symbol_mod %d\n",symbol_mod);

  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp)))
    pilots=1;
4100

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4101
  nsymb = (frame_parms->Ncp==NORMAL) ? 14:12;
4102 4103
  l=symbol;

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4104
  if (frame_parms->frame_type == TDD) {  // TDD
4105 4106
    sss_symb = nsymb-1;
    pss_symb = 2;
4107
  } else {
4108 4109 4110 4111
    sss_symb = (nsymb>>1)-2;
    pss_symb = (nsymb>>1)-1;
  }

4112
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
4113 4114 4115 4116

    if (high_speed_flag==1) {
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
      dl_ch1     = &dl_ch_estimates[2+aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
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    } else {
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      dl_ch0     = &dl_ch_estimates[aarx][5];
      dl_ch1     = &dl_ch_estimates[2+aarx][5];
    }
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    pmi_loc = pmi_ext;
    
    // pointers to extracted RX signals and channel estimates
    rxF_ext    = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];
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    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];
    dl_ch1_ext = &dl_ch_estimates_ext[2+aarx][symbol*(frame_parms->N_RB_DL*12)];

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    for (prb=0; prb<frame_parms->N_RB_DL; prb++) {
      skip_half=0;
      
      if (prb < 32)
	rb_alloc_ind = (rb_alloc[0]>>prb) & 1;
      else if (prb < 64)
	rb_alloc_ind = (rb_alloc[1]>>(prb-32)) & 1;
      else if (prb < 96)
	rb_alloc_ind = (rb_alloc[2]>>(prb-64)) & 1;
      else if (prb < 100)
	rb_alloc_ind = (rb_alloc[3]>>(prb-96)) & 1;
      else
	rb_alloc_ind = 0;
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      if (rb_alloc_ind == 1)
          nb_rb++;
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      if ((frame_parms->N_RB_DL&1) == 0) {  // even number of RBs
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	// PBCH
	if ((subframe==0) && 
	    (prb>=((frame_parms->N_RB_DL>>1)-3)) && 
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	    (prb<((frame_parms->N_RB_DL>>1)+3)) && 
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	    (l>=(nsymb>>1)) && 
	    (l<((nsymb>>1) + 4))) {
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	  rb_alloc_ind = 0;
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	  //	printf("symbol %d / rb %d: skipping PBCH REs\n",symbol,prb);
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	}
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	//SSS
	
	if (((subframe==0)||(subframe==5)) &&
	    (prb>=((frame_parms->N_RB_DL>>1)-3)) &&
	    (prb<((frame_parms->N_RB_DL>>1)+3)) &&
	    (l==sss_symb) ) {
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	  rb_alloc_ind = 0;
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	  //	printf("symbol %d / rb %d: skipping SSS REs\n",symbol,prb);
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	}
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	//PSS in subframe 0/5 if FDD
	if (frame_parms->frame_type == FDD) {  //FDD
	  if (((subframe==0)||(subframe==5)) && 
	      (prb>=((frame_parms->N_RB_DL>>1)-3)) && 
	      (prb<((frame_parms->N_RB_DL>>1)+3)) && 
	      (l==pss_symb) ) {
	    rb_alloc_ind = 0;
	    //	  printf("symbol %d / rb %d: skipping PSS REs\n",symbol,prb);
	  }
	}
	
	if ((frame_parms->frame_type == TDD) &&
	    (subframe==6)) { //TDD Subframe 6
	  if ((prb>=((frame_parms->N_RB_DL>>1)-3)) && 
	      (prb<((frame_parms->N_RB_DL>>1)+3)) && 
	      (l==pss_symb) ) {
	    rb_alloc_ind = 0;
	  }
	}
	
	if (rb_alloc_ind==1) {              // PRB is allocated

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	  prb_off      = 12*prb;
	  prb_off2     = 1+(12*(prb-(frame_parms->N_RB_DL>>1)));
	  dl_ch0p    = dl_ch0+(12*prb);
	  dl_ch1p    = dl_ch1+(12*prb);
	  if (prb<(frame_parms->N_RB_DL>>1)){
	    rxF      = &rxdataF[aarx][prb_off+
				      frame_parms->first_carrier_offset + 
				      (symbol*(frame_parms->ofdm_symbol_size))];
	  }
	  else {
	    rxF      = &rxdataF[aarx][prb_off2+
				      (symbol*(frame_parms->ofdm_symbol_size))];
	  }
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	 /*
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	 if (mimo_mode <= PUSCH_PRECODING1)
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          *pmi_loc = (pmi>>((prb>>2)<<1))&3;
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	 else
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	  *pmi_loc=(pmi>>prb)&1;*/
	 
	 *pmi_loc = get_pmi(frame_parms->N_RB_DL,mimo_mode,pmi,prb);
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          pmi_loc++;
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          if (pilots == 0) {
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            memcpy(dl_ch0_ext,dl_ch0p,12*sizeof(int));
            memcpy(dl_ch1_ext,dl_ch1p,12*sizeof(int));
            memcpy(rxF_ext,rxF,12*sizeof(int));
	    dl_ch0_ext +=12;
	    dl_ch1_ext +=12;
	    rxF_ext    +=12;
          } else { // pilots==1
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            j=0;
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            for (i=0; i<12; i++) {
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              if ((i!=frame_parms->nushift) &&
                  (i!=frame_parms->nushift+3) &&
                  (i!=frame_parms->nushift+6) &&
                  (i!=((frame_parms->nushift+9)%12))) {
                rxF_ext[j]=rxF[i];
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                //        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
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                dl_ch0_ext[j]=dl_ch0p[i];
                dl_ch1_ext[j++]=dl_ch1p[i];
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              }
            }
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	    dl_ch0_ext+=8;
	    dl_ch1_ext+=8;
	    rxF_ext+=8;
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          } // pilots==1
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	}
      } else {  // Odd number of RBs
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      // PBCH
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	if ((subframe==0) && 
	    (prb>((frame_parms->N_RB_DL>>1)-3)) && 
	    (prb<((frame_parms->N_RB_DL>>1)+3)) && 
	    (l>=(nsymb>>1)) && 
	    (l<((nsymb>>1) + 4))) {
	  rb_alloc_ind = 0;
	  //	printf("symbol %d / rb %d: skipping PBCH REs\n",symbol,prb);
	}
	
	//SSS
	
	if (((subframe==0)||(subframe==5)) &&
	    (prb>((frame_parms->N_RB_DL>>1)-3)) &&
	    (prb<((frame_parms->N_RB_DL>>1)+3)) &&
	    (l==sss_symb) ) {
	  rb_alloc_ind = 0;
	  //	printf("symbol %d / rb %d: skipping SSS REs\n",symbol,prb);
	}
	
	
	
	//PSS in subframe 0/5 if FDD
	if (frame_parms->frame_type == FDD) {  //FDD
	  if (((subframe==0)||(subframe==5)) && 
	      (prb>((frame_parms->N_RB_DL>>1)-3)) && 
	      (prb<((frame_parms->N_RB_DL>>1)+3)) && 
	      (l==pss_symb) ) {
	    rb_alloc_ind = 0;
	    //	  printf("symbol %d / rb %d: skipping PSS REs\n",symbol,prb);
	  }
	}
	
	if ((frame_parms->frame_type == TDD) &&
	    ((subframe==1) || (subframe==6))) { //TDD Subframe 1-6
	  if ((prb>((frame_parms->N_RB_DL>>1)-3)) && 
	      (prb<((frame_parms->N_RB_DL>>1)+3)) && 
	      (l==pss_symb) ) {
	    rb_alloc_ind = 0;
	  }
	}
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	if (rb_alloc_ind == 1) {
	  skip_half=0;
	
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	  //Check if we have to drop half a PRB due to PSS/SSS/PBCH
	  // skip_half == 0 means full PRB
	  // skip_half == 1 means first half is used (leftmost half-PRB from PSS/SSS/PBCH)
	  // skip_half == 2 means second half is used (rightmost half-PRB from PSS/SSS/PBCH)
	  //PBCH subframe 0, symbols nsymb>>1 ... nsymb>>1 + 3
	  if ((subframe==0) && 
	      (prb==((frame_parms->N_RB_DL>>1)-3)) && 
	      (l>=(nsymb>>1)) && 
	      (l<((nsymb>>1) + 4)))
	    skip_half=1;
	  else if ((subframe==0) && 
		   (prb==((frame_parms->N_RB_DL>>1)+3)) && 
		   (l>=(nsymb>>1)) && 
		   (l<((nsymb>>1) + 4)))
	    skip_half=2;
	  
	  //SSS
	  if (((subframe==0)||(subframe==5)) &&
	      (prb==((frame_parms->N_RB_DL>>1)-3)) &&
	      (l==sss_symb))
	    skip_half=1;
	  else if (((subframe==0)||(subframe==5)) &&
		   (prb==((frame_parms->N_RB_DL>>1)+3)) &&
		   (l==sss_symb))
	    skip_half=2;
	  
	  //PSS Subframe 0,5
	  if (((frame_parms->frame_type == FDD) &&
	       (((subframe==0)||(subframe==5)))) ||  //FDD Subframes 0,5
	      ((frame_parms->frame_type == TDD) &&
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	       (((subframe==1) || (subframe==6))))) { //TDD Subframes 1,6
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	    if ((prb==((frame_parms->N_RB_DL>>1)-3)) && 
		(l==pss_symb))
	      skip_half=1;
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	    else if ((prb==((frame_parms->N_RB_DL>>1)+3)) && 
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		     (l==pss_symb))
	      skip_half=2;
	  }
	  
	  
	  prb_off      = 12*prb;
	  prb_off2     = 7+(12*(prb-(frame_parms->N_RB_DL>>1)-1));
	  dl_ch0p      = dl_ch0+(12*prb);
	  dl_ch1p      = dl_ch1+(12*prb);
	  
	  if (prb<=(frame_parms->N_RB_DL>>1)){
	    rxF      = &rxdataF[aarx][prb_off+
				      frame_parms->first_carrier_offset + 
				      (symbol*(frame_parms->ofdm_symbol_size))];
	  }
	  else {
	    rxF      = &rxdataF[aarx][prb_off2+ 
				      (symbol*(frame_parms->ofdm_symbol_size))];
	  }
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#ifdef DEBUG_DLSCH_DEMOD
	  printf("symbol %d / rb %d: alloc %d skip_half %d (rxF %p, rxF_ext %p) prb_off (%d,%d)\n",symbol,prb,rb_alloc_ind,skip_half,rxF,rxF_ext,prb_off,prb_off2);
#endif
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         /* if (mimo_mode <= PUSCH_PRECODING1)
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           *pmi_loc = (pmi>>((prb>>2)<<1))&3;
	  else
	   *pmi_loc=(pmi>>prb)&1;
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         // printf("symbol_mod %d (pilots %d) rb %d, sb %d, pmi %d (pmi_loc %p,rxF %p, ch00 %p, ch01 %p, rxF_ext %p dl_ch0_ext %p dl_ch1_ext %p)\n",symbol_mod,pilots,prb,prb>>2,*pmi_loc,pmi_loc,rxF,dl_ch0, dl_ch1, rxF_ext,dl_ch0_ext,dl_ch1_ext);
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*/
	 *pmi_loc = get_pmi(frame_parms->N_RB_DL,mimo_mode,pmi,prb);
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          pmi_loc++;

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	  if (prb != (frame_parms->N_RB_DL>>1)) { // This PRB is not around DC
	    if (pilots==0) {
	      if (skip_half==1) {
		memcpy(dl_ch0_ext,dl_ch0p,6*sizeof(int32_t));
		memcpy(dl_ch1_ext,dl_ch1p,6*sizeof(int32_t));
		memcpy(rxF_ext,rxF,6*sizeof(int32_t));
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#ifdef DEBUG_DLSCH_DEMOD
		for (i=0;i<6;i++)
		  printf("extract rb %d, re %d => (%d,%d)\n",prb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
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		dl_ch0_ext+=6;
		dl_ch1_ext+=6;
		rxF_ext+=6;
	      } else if (skip_half==2) {
		memcpy(dl_ch0_ext,dl_ch0p+6,6*sizeof(int32_t));
		memcpy(dl_ch1_ext,dl_ch1p+6,6*sizeof(int32_t));
		memcpy(rxF_ext,rxF+6,6*sizeof(int32_t));
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#ifdef DEBUG_DLSCH_DEMOD
		for (i=0;i<6;i++)
		  printf("extract rb %d, re %d => (%d,%d)\n",prb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
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		dl_ch0_ext+=6;
		dl_ch1_ext+=6;
		rxF_ext+=6;
	      } else {  // skip_half==0
		memcpy(dl_ch0_ext,dl_ch0p,12*sizeof(int32_t));
		memcpy(dl_ch1_ext,dl_ch1p,12*sizeof(int32_t));
		memcpy(rxF_ext,rxF,12*sizeof(int32_t));
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#ifdef DEBUG_DLSCH_DEMOD
		for (i=0;i<12;i++)
		  printf("extract rb %d, re %d => (%d,%d)\n",prb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
#endif
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		dl_ch0_ext+=12;
		dl_ch1_ext+=12;
		rxF_ext+=12;
	      }
	    } else { // pilots=1
	      j=0;
	      
	      if (skip_half==1) {
		for (i=0; i<6; i++) {
		  if ((i!=frame_parms->nushift) &&
		      (i!=((frame_parms->nushift+3)%6))) {
		    rxF_ext[j]=rxF[i];
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#ifdef DEBUG_DLSCH_DEMOD
		    printf("(pilots,skip1)extract rb %d, re %d (%d)=> (%d,%d)\n",prb,i,j,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
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		    dl_ch0_ext[j]=dl_ch0p[i];
		    dl_ch1_ext[j++]=dl_ch1p[i];
		  }
		}
		dl_ch0_ext+=4;
		dl_ch1_ext+=4;
		rxF_ext+=4;
	      } else if (skip_half==2) {
		for (i=0; i<6; i++) {
		  if ((i!=frame_parms->nushift) &&
		      (i!=((frame_parms->nushift+3)%6))) {
		    rxF_ext[j]=rxF[(i+6)];
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#ifdef DEBUG_DLSCH_DEMOD
		    printf("(pilots,skip2)extract rb %d, re %d (%d) => (%d,%d)\n",prb,i,j,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
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		    dl_ch0_ext[j]=dl_ch0p[i+6];
		    dl_ch1_ext[j++]=dl_ch1p[i+6];
		  }
		}
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		dl_ch0_ext+=4;
		dl_ch1_ext+=4;
		rxF_ext+=4;

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	      } else { //skip_half==0
		for (i=0; i<12; i++) {
		  if ((i!=frame_parms->nushift) &&
		      (i!=frame_parms->nushift+3) &&
		      (i!=frame_parms->nushift+6) &&
		      (i!=((frame_parms->nushift+9)%12))) {
		    rxF_ext[j]=rxF[i];
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#ifdef DEBUG_DLSCH_DEMOD
		    printf("(pilots)extract rb %d, re %d => (%d,%d)\n",prb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
#endif
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		    dl_ch0_ext[j]  =dl_ch0p[i];
		    dl_ch1_ext[j++]=dl_ch1p[i];
		  }
		}
		dl_ch0_ext+=8;
		dl_ch1_ext+=8;
		rxF_ext+=8;
	      } //skip_half==0
	    } //pilots==1
	  } else {       // Do middle RB (around DC)
	    
	    if (pilots==0) {
	      memcpy(dl_ch0_ext,dl_ch0p,6*sizeof(int32_t));
	      memcpy(dl_ch1_ext,dl_ch1p,6*sizeof(int32_t));
	      memcpy(rxF_ext,rxF,6*sizeof(int32_t));
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#ifdef DEBUG_DLSCH_DEMOD
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	      for (i=0; i<6; i++) {
		printf("extract rb %d, re %d => (%d,%d)\n",prb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
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	      }
#endif
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	      rxF_ext+=6;
	      dl_ch0_ext+=6;
	      dl_ch1_ext+=6;
	      dl_ch0p+=6;
	      dl_ch1p+=6;
	      
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	      rxF       = &rxdataF[aarx][1+((symbol*(frame_parms->ofdm_symbol_size)))];
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	      memcpy(dl_ch0_ext,dl_ch0p,6*sizeof(int32_t));
	      memcpy(dl_ch1_ext,dl_ch1p,6*sizeof(int32_t));
	      memcpy(rxF_ext,rxF,6*sizeof(int32_t));	      
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#ifdef DEBUG_DLSCH_DEMOD
	      for (i=0; i<6; i++) {
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		printf("extract rb %d, re %d => (%d,%d)\n",prb,i,*(short *)&rxF_ext[i],*(1+(short*)&rxF_ext[i]));
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	      }
#endif
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	      rxF_ext+=6;
	      dl_ch0_ext+=6;
	      dl_ch1_ext+=6;
	    } else { // pilots==1
	      j=0;
	      
	      for (i=0; i<6; i++) {
		if ((i!=frame_parms->nushift) &&
		    (i!=((frame_parms->nushift+3)%6))) {
		  dl_ch0_ext[j]=dl_ch0p[i];
		  dl_ch1_ext[j]=dl_ch1p[i];
		  rxF_ext[j++]=rxF[i];
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#ifdef DEBUG_DLSCH_DEMOD
		  printf("(pilots)extract rb %d, re %d (%d) => (%d,%d)\n",prb,i,j,*(short *)&rxF[i],*(1+(short*)&rxF[i]));
#endif
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		}
	      }
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	      rxF       = &rxdataF[aarx][1+symbol*(frame_parms->ofdm_symbol_size)];
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	      for (; i<12; i++) {
		if ((i!=((frame_parms->nushift+6)%12)) &&
		    (i!=((frame_parms->nushift+9)%12))) {
		  dl_ch0_ext[j]=dl_ch0p[i];
		  dl_ch1_ext[j]=dl_ch1p[i];
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		  rxF_ext[j++]=rxF[i-6];	   
#ifdef DEBUG_DLSCH_DEMOD
		  printf("(pilots)extract rb %d, re %d (%d) => (%d,%d)\n",prb,i,j,*(short *)&rxF[1+i-6],*(1+(short*)&rxF[1+i-6]));
#endif
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		}
	      }
	      
	      dl_ch0_ext+=8;
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	      dl_ch1_ext+=8;
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	      rxF_ext+=8;
	    } //pilots==1
	  }  // if Middle PRB
	} // if odd PRB	      	      	         
      } // if rballoc==1
    } // for prb 
  } // for aarx
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  return(nb_rb/frame_parms->nb_antennas_rx);
}

//==============================================================================================
// Auxiliary functions
//==============================================================================================

#ifdef USER_MODE

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void dump_dlsch2(PHY_VARS_UE *phy_vars_ue,uint8_t eNB_id,uint16_t coded_bits_per_codeword,int round, unsigned char harq_pid ) {
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  unsigned int nsymb = (phy_vars_ue->lte_frame_parms.Ncp == 0) ? 14 : 12;
  char fname[32],vname[32];
  int N_RB_DL=phy_vars_ue->lte_frame_parms.N_RB_DL;

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  sprintf(fname,"dlsch%d_rxF_r%d_ext0.m",eNB_id,round);
  sprintf(vname,"dl%d_rxF_r%d_ext0",eNB_id,round);
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  write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->rxdataF_ext[0],12*N_RB_DL*nsymb,1,1);
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  if (phy_vars_ue->lte_frame_parms.nb_antennas_rx >1) {
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    sprintf(fname,"dlsch%d_rxF_r%d_ext1.m",eNB_id,round);
    sprintf(vname,"dl%d_rxF_r%d_ext1",eNB_id,round);
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    write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->rxdataF_ext[1],12*N_RB_DL*nsymb,1,1);
  }
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  sprintf(fname,"dlsch%d_ch_r%d_ext00.m",eNB_id,round);
  sprintf(vname,"dl%d_ch_r%d_ext00",eNB_id,round);
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  write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[0],12*N_RB_DL*nsymb,1,1);
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  if (phy_vars_ue->lte_frame_parms.nb_antennas_rx == 2) {
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    sprintf(fname,"dlsch%d_ch_r%d_ext01.m",eNB_id,round);
    sprintf(vname,"dl%d_ch_r%d_ext01",eNB_id,round);
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    write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[1],12*N_RB_DL*nsymb,1,1);
  }
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  if (phy_vars_ue->lte_frame_parms.nb_antennas_tx_eNB == 2) {
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    sprintf(fname,"dlsch%d_ch_r%d_ext10.m",eNB_id,round);
    sprintf(vname,"dl%d_ch_r%d_ext10",eNB_id,round);
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    write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[2],12*N_RB_DL*nsymb,1,1);
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    if (phy_vars_ue->lte_frame_parms.nb_antennas_rx == 2) {
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      sprintf(fname,"dlsch%d_ch_r%d_ext11.m",eNB_id,round);
      sprintf(vname,"dl%d_ch_r%d_ext11",eNB_id,round);
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      write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[3],12*N_RB_DL*nsymb,1,1);
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    }
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  }
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  /*
    write_output("dlsch%d_ch_ext01.m","dl01_ch0_ext",lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[1],12*N_RB_DL*nsymb,1,1);
    write_output("dlsch%d_ch_ext10.m","dl10_ch0_ext",lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[2],12*N_RB_DL*nsymb,1,1);
    write_output("dlsch%d_ch_ext11.m","dl11_ch0_ext",lte_ue_pdsch_vars[eNB_id]->dl_ch_estimates_ext[3],12*N_RB_DL*nsymb,1,1);
  */
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  sprintf(fname,"dlsch%d_r%d_rho.m",eNB_id,round);
  sprintf(vname,"dl_rho_r%d_%d",eNB_id,round);
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  write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_rho_ext[0][0][0],12*N_RB_DL*nsymb,1,1);
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  sprintf(fname,"dlsch%d_rxF_r%d_comp0.m",eNB_id,round);
  sprintf(vname,"dl%d_rxF_r%d_comp0",eNB_id,round);
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  write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->rxdataF_comp0[0],12*N_RB_DL*nsymb,1,1);
  if (phy_vars_ue->lte_frame_parms.nb_antennas_tx_eNB == 2) {
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    sprintf(fname,"dlsch%d_rxF_r%d_comp1.m",eNB_id,round);
    sprintf(vname,"dl%d_rxF_r%d_comp1",eNB_id,round);
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    write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->rxdataF_comp1[harq_pid][round][0],12*N_RB_DL*nsymb,1,1);
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  }

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  sprintf(fname,"dlsch%d_rxF_r%d_llr.m",eNB_id,round);
  sprintf(vname,"dl%d_r%d_llr",eNB_id,round);
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  write_output(fname,vname, phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->llr[0],coded_bits_per_codeword,1,0);
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  sprintf(fname,"dlsch%d_r%d_mag1.m",eNB_id,round);
  sprintf(vname,"dl%d_r%d_mag1",eNB_id,round);
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  write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_mag0[0],12*N_RB_DL*nsymb,1,1);
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  sprintf(fname,"dlsch%d_r%d_mag2.m",eNB_id,round);
  sprintf(vname,"dl%d_r%d_mag2",eNB_id,round);
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  write_output(fname,vname,phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->dl_ch_magb0[0],12*N_RB_DL*nsymb,1,1);

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  //  printf("log2_maxh = %d\n",phy_vars_ue->lte_ue_pdsch_vars[eNB_id]->log2_maxh);
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}
#endif

#ifdef DEBUG_DLSCH_DEMOD
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/*
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void print_bytes(char *s,__m128i *x)
{
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  char *tempb = (char *)x;

  printf("%s  : %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d\n",s,
         tempb[0],tempb[1],tempb[2],tempb[3],tempb[4],tempb[5],tempb[6],tempb[7],
         tempb[8],tempb[9],tempb[10],tempb[11],tempb[12],tempb[13],tempb[14],tempb[15]
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	 );
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}

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void print_shorts(char *s,__m128i *x)
{
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  short *tempb = (short *)x;
  printf("%s  : %d,%d,%d,%d,%d,%d,%d,%d\n",s,
         tempb[0],tempb[1],tempb[2],tempb[3],tempb[4],tempb[5],tempb[6],tempb[7]);

}

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void print_shorts2(char *s,__m64 *x)
{
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  short *tempb = (short *)x;
  printf("%s  : %d,%d,%d,%d\n",s,
         tempb[0],tempb[1],tempb[2],tempb[3]);

}

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void print_ints(char *s,__m128i *x)
{
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  int *tempb = (int *)x;
  printf("%s  : %d,%d,%d,%d\n",s,
         tempb[0],tempb[1],tempb[2],tempb[3]);

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}*/
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#endif