/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.0  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

/*! \file PHY/LTE_TRANSPORT/dlsch_demodulation.c
 * \brief Top-level routines for demodulating the PDSCH physical channel from 38-211, V15.2 2018-06
 * \author H.Wang
 * \date 2018
 * \version 0.1
 * \company Eurecom
 * \note
 * \warning
 */
#include "PHY/defs_nr_UE.h"
#include "PHY/phy_extern_nr_ue.h"
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
#include "nr_transport_proto_ue.h"
//#include "SCHED/defs.h"
//#include "PHY/defs.h"
//#include "extern.h"
#include "PHY/sse_intrin.h"
#include "T.h"
#include "openair1/PHY/NR_UE_ESTIMATION/nr_estimation.h"
#include "openair1/PHY/NR_TRANSPORT/nr_dlsch.h"
#include "PHY/NR_REFSIG/nr_refsig.h"
#include "PHY/NR_REFSIG/dmrs_nr.h"

#ifndef USER_MODE
#define NOCYGWIN_STATIC static
#else
#define NOCYGWIN_STATIC
#endif

/* dynamic shift for LLR computation for TM3/4
 * set as command line argument, see lte-softmodem.c
 * default value: 0
 */
int32_t nr_dlsch_demod_shift = 0;
//int16_t interf_unaw_shift = 13;

//#define DEBUG_HARQ
//#define DEBUG_PHY
//#define DEBUG_DLSCH_DEMOD
//#define DEBUG_PDSCH_RX

// [MCS][i_mod (0,1,2) = (2,4,6)]
//unsigned char offset_mumimo_llr_drange_fix=0;
//inferference-free case
/*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} ;*/

//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

/*
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
{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
*/
 /*
 //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
 */
//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}};

#define print_ints(s,x) printf("%s = %d %d %d %d\n",s,(x)[0],(x)[1],(x)[2],(x)[3])
#define print_shorts(s,x) printf("%s = [%d+j*%d, %d+j*%d, %d+j*%d, %d+j*%d]\n",s,(x)[0],(x)[1],(x)[2],(x)[3],(x)[4],(x)[5],(x)[6],(x)[7])

static void nr_dlsch_dual_stream_correlation_core(int **dl_ch_estimates_ext,
						  int **dl_ch_estimates_ext_i,
						  int **dl_ch_rho_ext,
						  unsigned char n_tx,
						  unsigned char n_rx,
						  unsigned char output_shift,
						  int length,
						  int start_point);

uint8_t nr_zero_forcing_rx_2layers(int **rxdataF_comp,
                                   int **dl_ch_mag,
                                   int **dl_ch_magb,
                                   int **dl_ch_magr,
                                   int **dl_ch_estimates_ext,
                                   unsigned short nb_rb,
                                   unsigned char n_rx,
                                   unsigned char mod_order,
                                   int shift,
                                   unsigned char symbol,
                                   int length);

static void nr_dlsch_layer_demapping(int16_t **llr_cw,
				     uint8_t Nl,
				     uint8_t mod_order,
				     uint32_t length,
				     int32_t codeword_TB0,
				     int32_t codeword_TB1,
				     int16_t **llr_layers);


/* compute LLR */
static int nr_dlsch_llr(NR_UE_PDSCH **pdsch_vars,
                        NR_DL_FRAME_PARMS *frame_parms,
                        int32_t **rxdataF_comp_ptr,
                        int32_t **dl_ch_mag_ptr,
                        NR_DL_UE_HARQ_t *dlsch0_harq,
                        NR_DL_UE_HARQ_t *dlsch1_harq,
                        RX_type_t rx_type,
                        unsigned char harq_pid,
                        unsigned char gNB_id,
                        unsigned char gNB_id_i,
                        unsigned char first_symbol_flag,
                        unsigned char symbol,
                        unsigned short nb_rb,
                        unsigned short round,
                        int32_t codeword_TB0,
                        int32_t codeword_TB1,
                        uint32_t len,
                        uint8_t nr_slot_rx,
                        uint8_t beamforming_mode);

/* Main Function */
int nr_rx_pdsch(PHY_VARS_NR_UE *ue,
                UE_nr_rxtx_proc_t *proc,
                PDSCH_t type,
                unsigned char gNB_id,
                unsigned char gNB_id_i,
                uint32_t frame,
                uint8_t nr_slot_rx,
                unsigned char symbol,
                unsigned char first_symbol_flag,
                RX_type_t rx_type,
                unsigned char i_mod,
                unsigned char harq_pid)
{

  NR_UE_COMMON *common_vars  = &ue->common_vars;
  NR_UE_PDSCH **pdsch_vars;
  NR_DL_FRAME_PARMS *frame_parms    = &ue->frame_parms;
  PHY_NR_MEASUREMENTS *measurements = &ue->measurements;
  NR_UE_DLSCH_t   **dlsch;

  int avg[16];
//  int avg_0[2];
//  int avg_1[2];

#if UE_TIMING_TRACE
  uint8_t slot = 0;
#endif

  unsigned char aatx=0,aarx=0;

  unsigned short nb_rb = 0, round;
  int avgs = 0;// rb;
  NR_DL_UE_HARQ_t *dlsch0_harq, *dlsch1_harq = NULL;

  uint8_t beamforming_mode = 0;

  int32_t **rxdataF_comp_ptr;
  int32_t **dl_ch_mag_ptr;
  int32_t codeword_TB0 = -1;
  int32_t codeword_TB1 = -1;

  //to be updated higher layer
  unsigned short start_rb = 0;
  unsigned short nb_rb_pdsch = 50;
  //int16_t  *pllr_symbol_cw0_deint;
  //int16_t  *pllr_symbol_cw1_deint;
  //uint16_t bundle_L = 2;
  uint16_t n_tx=1, n_rx=1;
  int32_t median[16];
  uint32_t len;
  uint16_t startSymbIdx=0;
  uint16_t nbSymb=0;
  uint16_t pduBitmap=0x0;

  switch (type) {
  case SI_PDSCH:
    pdsch_vars = ue->pdsch_vars[proc->thread_id];
    dlsch = &ue->dlsch_SI[gNB_id];
    dlsch0_harq = dlsch[0]->harq_processes[harq_pid];

    break;

  case RA_PDSCH:
    pdsch_vars = ue->pdsch_vars[proc->thread_id];
    dlsch = &ue->dlsch_ra[gNB_id];
    dlsch0_harq = dlsch[0]->harq_processes[harq_pid];

    break;

  case PDSCH:
    pdsch_vars = ue->pdsch_vars[proc->thread_id];
    dlsch = ue->dlsch[proc->thread_id][gNB_id];
    dlsch0_harq = dlsch[0]->harq_processes[harq_pid];
    dlsch1_harq = dlsch[1]->harq_processes[harq_pid];
    beamforming_mode = ue->transmission_mode[gNB_id] < 7 ? 0 :ue->transmission_mode[gNB_id];
    break;

  default:
    LOG_E(PHY, "[UE][FATAL] nr_slot_rx %d: Unknown PDSCH format %d\n", nr_slot_rx, type);
    return -1;
    break;
  }

  if (dlsch0_harq && dlsch1_harq){

    LOG_D(PHY,"AbsSubframe %d.%d / Sym %d harq_pid %d, harq status %d.%d \n", frame, nr_slot_rx, symbol, harq_pid, dlsch0_harq->status, dlsch1_harq->status);

    if ((dlsch0_harq->status == ACTIVE) && (dlsch1_harq->status == ACTIVE)){
      codeword_TB0 = dlsch0_harq->codeword;
      codeword_TB1 = dlsch1_harq->codeword;
      dlsch0_harq = dlsch[codeword_TB0]->harq_processes[harq_pid];
      dlsch1_harq = dlsch[codeword_TB1]->harq_processes[harq_pid];

      #ifdef DEBUG_HARQ
        printf("[DEMOD] I am assuming both TBs are active, in cw0 %d and cw1 %d \n", codeword_TB0, codeword_TB1);
      #endif

    } else if ((dlsch0_harq->status == ACTIVE) && (dlsch1_harq->status != ACTIVE) ) {
      codeword_TB0 = dlsch0_harq->codeword;
      dlsch0_harq = dlsch[codeword_TB0]->harq_processes[harq_pid];
      dlsch1_harq = NULL;

      #ifdef DEBUG_HARQ
        printf("[DEMOD] I am assuming only TB0 is active, in cw %d \n", codeword_TB0);
      #endif

    } else if ((dlsch0_harq->status != ACTIVE) && (dlsch1_harq->status == ACTIVE)){
      codeword_TB1 = dlsch1_harq->codeword;
      dlsch0_harq  = NULL;
      dlsch1_harq  = dlsch[codeword_TB1]->harq_processes[harq_pid];

      #ifdef DEBUG_HARQ
        printf("[DEMOD] I am assuming only TB1 is active, it is in cw %d\n", codeword_TB1);
      #endif

      LOG_E(PHY, "[UE][FATAL] DLSCH: TB0 not active and TB1 active case is not supported\n");
      return -1;

    } else {
      LOG_E(PHY,"[UE][FATAL] nr_slot_rx %d: no active DLSCH\n", nr_slot_rx);
      return(-1);
    }
  } else if (dlsch0_harq) {
    if (dlsch0_harq->status == ACTIVE) {
      codeword_TB0 = dlsch0_harq->codeword;
      dlsch0_harq = dlsch[0]->harq_processes[harq_pid];

      #ifdef DEBUG_HARQ
        printf("[DEMOD] I am assuming only TB0 is active\n");
      #endif
    } else {
      LOG_E(PHY,"[UE][FATAL] nr_slot_rx %d: no active DLSCH\n", nr_slot_rx);
      return (-1);
    }
  } else {
    LOG_E(PHY, "Done\n");
    return -1;
  }

  dlsch0_harq->Qm = nr_get_Qm_dl(dlsch[0]->harq_processes[harq_pid]->mcs, dlsch[0]->harq_processes[harq_pid]->mcs_table);
  dlsch0_harq->R = nr_get_code_rate_dl(dlsch[0]->harq_processes[harq_pid]->mcs, dlsch[0]->harq_processes[harq_pid]->mcs_table);
  if (dlsch0_harq->Qm == 0 || dlsch0_harq->R == 0) {
    LOG_W(MAC, "Invalid code rate or Mod order, likely due to unexpected DL DCI.\n");
      return -1;
  }

  #ifdef DEBUG_HARQ
    printf("[DEMOD] MIMO mode = %d\n", dlsch0_harq->mimo_mode);
    printf("[DEMOD] cw for TB0 = %d, cw for TB1 = %d\n", codeword_TB0, codeword_TB1);
  #endif

  start_rb = dlsch0_harq->start_rb;
  nb_rb_pdsch =  dlsch0_harq->nb_rb;

  DevAssert(dlsch0_harq);
  round = dlsch0_harq->round;
  //printf("round = %d\n", round);

  if (gNB_id > 2) {
    LOG_W(PHY, "In %s: Illegal gNB_id %d\n", __FUNCTION__, gNB_id);
    return(-1);
  }

  if (!common_vars) {
    LOG_W(PHY,"dlsch_demodulation.c: Null common_vars\n");
    return(-1);
  }

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

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

  if (!frame_parms) {
    LOG_W(PHY,"dlsch_demodulation.c: Null frame_parms\n");
    return(-1);
  }

  if (dlsch0_harq->mimo_mode>NR_DUALSTREAM) {
    LOG_E(PHY,"This transmission mode is not yet supported!\n");
    return(-1);
  }

  if (dlsch0_harq->mimo_mode==NR_DUALSTREAM)  {
    DevAssert(dlsch1_harq);
  }

#if UE_TIMING_TRACE
  if(symbol > ue->frame_parms.symbols_per_slot>>1)
  {
      slot = 1;
  }
#endif

#ifdef DEBUG_HARQ
  printf("Demod  dlsch0_harq->pmi_alloc %d\n",  dlsch0_harq->pmi_alloc);
#endif

  uint8_t pilots = (dlsch0_harq->dlDmrsSymbPos >> symbol) & 1;
  uint8_t config_type = dlsch0_harq->dmrsConfigType;

  if (beamforming_mode==0) {//No beamforming
#if UE_TIMING_TRACE
    start_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#endif
    if (dlsch0_harq->Nl > 1)//More than or equal 2 layers
      nb_rb = nr_dlsch_extract_rbs_multiple(common_vars->common_vars_rx_data_per_thread[proc->thread_id].rxdataF,
                                            pdsch_vars[gNB_id]->dl_ch_estimates,
                                            pdsch_vars[gNB_id]->rxdataF_ext,
                                            pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                            symbol,
                                            pilots,
                                            config_type,
                                            start_rb + dlsch0_harq->BWPStart,
                                            nb_rb_pdsch,
                                            dlsch0_harq->n_dmrs_cdm_groups,
                                            dlsch0_harq->Nl,
                                            frame_parms,
                                            dlsch0_harq->dlDmrsSymbPos);
    else// one layer
      nb_rb = nr_dlsch_extract_rbs_single(common_vars->common_vars_rx_data_per_thread[proc->thread_id].rxdataF,
                                          pdsch_vars[gNB_id]->dl_ch_estimates,
                                          pdsch_vars[gNB_id]->rxdataF_ext,
                                          pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                          symbol,
                                          pilots,
                                          config_type,
                                          start_rb + dlsch0_harq->BWPStart,
                                          nb_rb_pdsch,
                                          dlsch0_harq->n_dmrs_cdm_groups,
                                          frame_parms,
                                          dlsch0_harq->dlDmrsSymbPos);
  }
  else if(beamforming_mode>7) {
    LOG_W(PHY,"dlsch_demodulation: beamforming mode not supported yet.\n");
  }
  
  //printf("nb_rb = %d, gNB_id %d\n",nb_rb,gNB_id);
  if (nb_rb==0) {
    LOG_D(PHY,"dlsch_demodulation.c: nb_rb=0\n");
    return(-1);
  }

  len = (pilots==1)? ((config_type==NFAPI_NR_DMRS_TYPE1)?nb_rb*(12-6*dlsch0_harq->n_dmrs_cdm_groups): nb_rb*(12-4*dlsch0_harq->n_dmrs_cdm_groups)):(nb_rb*12);

#if UE_TIMING_TRACE
  stop_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#if DISABLE_LOG_X
  printf("[AbsSFN %u.%d] Slot%d Symbol %d type %d: Pilot/Data extraction %5.2f \n",
	 frame,nr_slot_rx,slot,symbol,type,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#else
  LOG_I(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d type %d: Pilot/Data extraction %5.2f \n",
	frame,nr_slot_rx,slot,symbol,type,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#endif
#endif
  
#if UE_TIMING_TRACE
  start_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#endif
  n_tx = dlsch0_harq->Nl;
  n_rx = frame_parms->nb_antennas_rx;
  
  nr_dlsch_scale_channel(pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                         frame_parms,
                         n_tx,
                         n_rx,
                         dlsch,
                         symbol,
                         pilots,
                         len,
                         nb_rb_pdsch);

#if UE_TIMING_TRACE
    stop_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#if DISABLE_LOG_X
    printf("[AbsSFN %u.%d] Slot%d Symbol %d: Channel Scale %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#else
    LOG_I(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d: Channel Scale  %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#endif
#endif

#if UE_TIMING_TRACE
    start_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#endif
  if (first_symbol_flag==1) {
    if (beamforming_mode==0){
      nr_dlsch_channel_level(pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                             frame_parms,
                             n_tx,
                             avg,
                             symbol,
                             len,
                             nb_rb_pdsch);
      avgs = 0;
      for (aatx=0;aatx<n_tx;aatx++)
        for (aarx=0;aarx<n_rx;aarx++) {
          //LOG_I(PHY, "nb_rb %d len %d avg_%d_%d Power per SC is %d\n",nb_rb, len,aarx, aatx,avg[aatx*frame_parms->nb_antennas_rx+aarx]);
          avgs = cmax(avgs,avg[(aatx*frame_parms->nb_antennas_rx)+aarx]);
          //LOG_I(PHY, "avgs Power per SC is %d\n", avgs);
          median[(aatx*frame_parms->nb_antennas_rx)+aarx] = avg[(aatx*frame_parms->nb_antennas_rx)+aarx];
        }

      if (dlsch0_harq->mimo_mode == NR_DUALSTREAM) {
        nr_dlsch_channel_level_median(pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                      median,
                                      n_tx,
                                      n_rx,
                                      len,
                                      symbol*nb_rb*12);

        for (aatx = 0; aatx < n_tx; aatx++) {
          for (aarx = 0; aarx < n_rx; aarx++) {
            avgs = cmax(avgs, median[aatx*n_rx + aarx]);
          }
        }
      }

      pdsch_vars[gNB_id]->log2_maxh = (log2_approx(avgs)/2) + 1;
      //LOG_I(PHY, "avgs Power per SC is %d lg2_maxh %d\n", avgs,  pdsch_vars[gNB_id]->log2_maxh);
    }
    LOG_D(PHY,"[DLSCH] AbsSubframe %d.%d log2_maxh = %d [log2_maxh0 %d log2_maxh1 %d] (%d,%d)\n",
          frame%1024,
          nr_slot_rx,
          pdsch_vars[gNB_id]->log2_maxh,
          pdsch_vars[gNB_id]->log2_maxh0,
          pdsch_vars[gNB_id]->log2_maxh1,
          avg[0],
          avgs);
  }

#if T_TRACER
    if (type == PDSCH)
    {
      T(T_UE_PHY_PDSCH_ENERGY, T_INT(gNB_id),  T_INT(0), T_INT(frame%1024), T_INT(nr_slot_rx),
                               T_INT(avg[0]), T_INT(avg[1]),    T_INT(avg[2]),             T_INT(avg[3]));
    }
#endif

#if UE_TIMING_TRACE
    stop_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#if DISABLE_LOG_X
    printf("[AbsSFN %u.%d] Slot%d Symbol %d first_symbol_flag %d: Channel Level %5.2f \n",frame,nr_slot_rx,slot,symbol,first_symbol_flag,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#else
    LOG_I(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d first_symbol_flag %d: Channel Level  %5.2f \n",frame,nr_slot_rx,slot,symbol,first_symbol_flag,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#endif
#endif


#if UE_TIMING_TRACE
    start_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#endif
// Now channel compensation
  if (dlsch0_harq->mimo_mode<NR_DUALSTREAM) {
    nr_dlsch_channel_compensation(pdsch_vars[gNB_id]->rxdataF_ext,
                                  pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                  pdsch_vars[gNB_id]->dl_ch_mag0,
                                  pdsch_vars[gNB_id]->dl_ch_magb0,
                                  pdsch_vars[gNB_id]->dl_ch_magr0,
                                  pdsch_vars[gNB_id]->rxdataF_comp0,
                                  (n_tx>1) ? pdsch_vars[gNB_id]->rho : NULL,
                                  frame_parms,
                                  n_tx,
                                  symbol,
                                  len,
                                  first_symbol_flag,
                                  dlsch0_harq->Qm,
                                  nb_rb_pdsch,
                                  pdsch_vars[gNB_id]->log2_maxh,
                                  measurements); // log2_maxh+I0_shift
    }

  else if (dlsch0_harq->mimo_mode == NR_DUALSTREAM) {
    nr_dlsch_channel_compensation_core(pdsch_vars[gNB_id]->rxdataF_ext,
                                       pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                       pdsch_vars[gNB_id]->dl_ch_mag0,
                                       pdsch_vars[gNB_id]->dl_ch_magb0,
                                       pdsch_vars[gNB_id]->rxdataF_comp0, //rxdataF_comp
                                       NULL,
                                       n_tx,
                                       n_rx,
                                       dlsch0_harq->Qm,
                                       pdsch_vars[gNB_id]->log2_maxh,
                                       2*len, // subcarriers Re Im
                                       0); // we start from the beginning of the vector
    // compute correlation between signal and interference channels (rho12 and rho21)
    nr_dlsch_dual_stream_correlation_core(pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                          &(pdsch_vars[gNB_id]->dl_ch_estimates_ext[2]),
                                          pdsch_vars[gNB_id]->dl_ch_rho_ext[harq_pid][round],
                                          n_tx,
                                          n_rx,
                                          pdsch_vars[gNB_id]->log2_maxh,
                                          2*len,
                                          0);
  }

#if UE_TIMING_TRACE
    stop_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#if DISABLE_LOG_X
    printf("[AbsSFN %u.%d] Slot%d Symbol %d log2_maxh %d channel_level %d: Channel Comp %5.2f \n", frame, nr_slot_rx, slot, symbol, pdsch_vars[gNB_id]->log2_maxh, proc->channel_level, ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#else
    LOG_I(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d log2_maxh %d channel_level %d: Channel Comp  %5.2f \n", frame, nr_slot_rx, slot, symbol, pdsch_vars[gNB_id]->log2_maxh, proc->channel_level, ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#endif
#endif
// MRC
#if UE_TIMING_TRACE
    start_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#endif

  if (frame_parms->nb_antennas_rx > 1) {
    if (dlsch0_harq->mimo_mode<NR_DUALSTREAM) {
      nr_dlsch_detection_mrc(pdsch_vars[gNB_id]->rxdataF_comp0,
                             (n_tx>1)? pdsch_vars[gNB_id]->rho : NULL,
                             pdsch_vars[gNB_id]->dl_ch_mag0,
                             pdsch_vars[gNB_id]->dl_ch_magb0,
                             pdsch_vars[gNB_id]->dl_ch_magr0,
                             n_tx,
                             n_rx,
                             symbol,
                             nb_rb_pdsch,
                             len);
      if (n_tx == 2)//Apply zero forcing for 2 Tx layers
        nr_zero_forcing_rx_2layers(pdsch_vars[gNB_id]->rxdataF_comp0,
                                   pdsch_vars[gNB_id]->dl_ch_mag0,
                                   pdsch_vars[gNB_id]->dl_ch_magb0,
                                   pdsch_vars[gNB_id]->dl_ch_magr0,
                                   pdsch_vars[gNB_id]->dl_ch_estimates_ext,
                                   nb_rb_pdsch,
                                   n_rx,
                                   dlsch0_harq->Qm,
                                   pdsch_vars[gNB_id]->log2_maxh,
                                   symbol,
                                   len);
    }
    else if (dlsch0_harq->mimo_mode == NR_DUALSTREAM) {
      nr_dlsch_detection_mrc_core(pdsch_vars[gNB_id]->rxdataF_comp0,
                                  NULL,
                                  pdsch_vars[gNB_id]->dl_ch_rho_ext[harq_pid][round],
                                  pdsch_vars[gNB_id]->dl_ch_rho2_ext,
                                  pdsch_vars[gNB_id]->dl_ch_mag0,
                                  pdsch_vars[gNB_id]->dl_ch_magb0,
                                  NULL,
                                  NULL,
                                  n_tx,
                                  n_rx,
                                  2*len,
                                  0);
    }
  }
  //printf("start compute LLR\n");
  if (dlsch0_harq->mimo_mode == NR_DUALSTREAM)  {
    rxdataF_comp_ptr = pdsch_vars[gNB_id]->rxdataF_comp1[harq_pid][round];
    dl_ch_mag_ptr = pdsch_vars[gNB_id]->dl_ch_mag1[harq_pid][round];
  }
  else {
    rxdataF_comp_ptr = pdsch_vars[gNB_id_i]->rxdataF_comp0;
    dl_ch_mag_ptr = pdsch_vars[gNB_id_i]->dl_ch_mag0;
    //i_mod should have been passed as a parameter
  }
  
#if UE_TIMING_TRACE
    stop_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#if DISABLE_LOG_X
    printf("[AbsSFN %u.%d] Slot%d Symbol %d: Channel Combine %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#else
    LOG_I(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d: Channel Combine  %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#endif
#endif

#if UE_TIMING_TRACE

    start_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#endif
  /* Store the valid DL RE's */
    pdsch_vars[gNB_id]->dl_valid_re[symbol-1] = len;

    if(dlsch0_harq->status == ACTIVE) {
      startSymbIdx = dlsch0_harq->start_symbol;
      nbSymb = dlsch0_harq->nb_symbols;
      pduBitmap = dlsch0_harq->pduBitmap;
    }
    if(dlsch1_harq) {
      startSymbIdx = dlsch1_harq->start_symbol;
      nbSymb = dlsch1_harq->nb_symbols;
      pduBitmap = dlsch1_harq->pduBitmap;
    }

    /* Check for PTRS bitmap and process it respectively */
    if((pduBitmap & 0x1) && (type == PDSCH)) {
      nr_pdsch_ptrs_processing(ue,
                               pdsch_vars,
                               frame_parms,
                               dlsch0_harq,
                               dlsch1_harq,
                               gNB_id,
                               nr_slot_rx,
                               symbol,
                               (nb_rb*12),
                               dlsch[0]->rnti,rx_type);
      pdsch_vars[gNB_id]->dl_valid_re[symbol-1] -= pdsch_vars[gNB_id]->ptrs_re_per_slot[0][symbol];
    }

    /* at last symbol in a slot calculate LLR's for whole slot */
    if(symbol == (startSymbIdx + nbSymb -1)) {
      for(uint8_t i =startSymbIdx; i < (startSymbIdx+nbSymb);i++) {
        /* re evaluating the first symbol flag as LLR's are done in symbol loop  */
        if(i == startSymbIdx && i < 3) {
          first_symbol_flag =1;
        }
        else {
          first_symbol_flag=0;
        }
        /* Calculate LLR's for each symbol */
        nr_dlsch_llr(pdsch_vars, frame_parms,
                     rxdataF_comp_ptr, dl_ch_mag_ptr,
                     dlsch0_harq, dlsch1_harq,
                     rx_type, harq_pid,
                     gNB_id, gNB_id_i,
                     first_symbol_flag,
                     i, nb_rb, round,
                     codeword_TB0, codeword_TB1,
                     pdsch_vars[gNB_id]->dl_valid_re[i-1],
                     nr_slot_rx, beamforming_mode);
      }

      int dmrs_type = dlsch[0]->harq_processes[harq_pid]->dmrsConfigType;
      uint8_t nb_re_dmrs;
      uint16_t dmrs_len = get_num_dmrs(dlsch[0]->harq_processes[harq_pid]->dlDmrsSymbPos);
      if (dmrs_type==NFAPI_NR_DMRS_TYPE1) {
        nb_re_dmrs = 6*dlsch[0]->harq_processes[harq_pid]->n_dmrs_cdm_groups;
      } else {
        nb_re_dmrs = 4*dlsch[0]->harq_processes[harq_pid]->n_dmrs_cdm_groups;
      }
      dlsch[0]->harq_processes[harq_pid]->G = nr_get_G(dlsch[0]->harq_processes[harq_pid]->nb_rb,
                                                       dlsch[0]->harq_processes[harq_pid]->nb_symbols,
                                                       nb_re_dmrs,
                                                       dmrs_len,
                                                       dlsch[0]->harq_processes[harq_pid]->Qm,
                                                       dlsch[0]->harq_processes[harq_pid]->Nl);
      nr_dlsch_layer_demapping(pdsch_vars[gNB_id]->llr,
                               dlsch[0]->harq_processes[harq_pid]->Nl,
                               dlsch[0]->harq_processes[harq_pid]->Qm,
                               dlsch[0]->harq_processes[harq_pid]->G,
                               codeword_TB0,
                               codeword_TB1,
                               pdsch_vars[gNB_id]->layer_llr);

    }

#if UE_TIMING_TRACE
    stop_meas(&ue->generic_stat_bis[proc->thread_id][slot]);
#if DISABLE_LOG_X
    printf("[AbsSFN %u.%d] Slot%d Symbol %d: LLR Computation %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#else
    LOG_I(PHY, "[AbsSFN %u.%d] Slot%d Symbol %d: LLR Computation  %5.2f \n",frame,nr_slot_rx,slot,symbol,ue->generic_stat_bis[proc->thread_id][slot].p_time/(cpuf*1000.0));
#endif
#endif

// Please keep it: useful for debugging
#ifdef DEBUG_PDSCH_RX
  char filename[40];
  uint8_t aa = 0;

  snprintf(filename, 40, "rxdataF0_symb_%d_nr_slot_rx_%d.m", symbol, nr_slot_rx);
  write_output(filename, "rxdataF0", &common_vars->common_vars_rx_data_per_thread[proc->thread_id].rxdataF[0][0], NR_SYMBOLS_PER_SLOT*frame_parms->ofdm_symbol_size, 1, 1);

  snprintf(filename, 40, "dl_ch_estimates0%d_symb_%d_nr_slot_rx_%d.m", aa, symbol, nr_slot_rx);
  write_output(filename, "dl_ch_estimates", &pdsch_vars[gNB_id]->dl_ch_estimates[aa][0], NR_SYMBOLS_PER_SLOT*frame_parms->ofdm_symbol_size, 1, 1);

  snprintf(filename, 40, "rxdataF_ext0%d_symb_%d_nr_slot_rx_%d.m", aa, symbol, nr_slot_rx);
  write_output(filename, "rxdataF_ext", &pdsch_vars[gNB_id]->rxdataF_ext[aa][0], NR_SYMBOLS_PER_SLOT*frame_parms->N_RB_DL*NR_NB_SC_PER_RB, 1, 1);

  snprintf(filename, 40, "dl_ch_estimates_ext0%d_symb_%d_nr_slot_rx_%d.m", aa, symbol, nr_slot_rx);
  write_output(filename, "dl_ch_estimates_ext00", &pdsch_vars[gNB_id]->dl_ch_estimates_ext[aa][0], NR_SYMBOLS_PER_SLOT*frame_parms->N_RB_DL*NR_NB_SC_PER_RB, 1, 1);

  snprintf(filename, 40, "rxdataF_comp0%d_symb_%d_nr_slot_rx_%d.m", aa, symbol, nr_slot_rx);
  write_output(filename, "rxdataF_comp00", &pdsch_vars[gNB_id]->rxdataF_comp0[aa][0], NR_SYMBOLS_PER_SLOT*frame_parms->N_RB_DL*NR_NB_SC_PER_RB, 1, 1);

  for (int i=0; i < 2; i++){
    snprintf(filename, 40,  "llr%d_symb_%d_nr_slot_rx_%d.m", i, symbol, nr_slot_rx);
    write_output(filename,"llr",  &pdsch_vars[gNB_id]->llr[i][0], (NR_SYMBOLS_PER_SLOT*nb_rb*NR_NB_SC_PER_RB*dlsch1_harq->Qm) - 4*(nb_rb*4*dlsch1_harq->Qm), 1, 0);
  }
#endif

#if T_TRACER
  T(T_UE_PHY_PDSCH_IQ, T_INT(gNB_id), T_INT(ue->Mod_id), T_INT(frame%1024),
    T_INT(nr_slot_rx), T_INT(nb_rb),
    T_INT(frame_parms->N_RB_UL), T_INT(frame_parms->symbols_per_slot),
    T_BUFFER(&pdsch_vars[gNB_id]->rxdataF_comp0[gNB_id][0], 2 * /* ulsch[UE_id]->harq_processes[harq_pid]->nb_rb */ frame_parms->N_RB_UL *12*frame_parms->symbols_per_slot*2));
#endif
  return(0);

}

void nr_dlsch_deinterleaving(uint8_t symbol,
                             uint8_t start_symbol,
                             uint16_t L,
                             uint16_t *llr,
                             uint16_t *llr_deint,
                             uint16_t nb_rb_pdsch)
{

  uint32_t bundle_idx, N_bundle, R, C, r,c;
  int32_t m,k;
  uint8_t nb_re;

  R=2;
  N_bundle = nb_rb_pdsch/L;
  C=N_bundle/R;

  uint32_t *bundle_deint = malloc(N_bundle*sizeof(uint32_t));

  printf("N_bundle %u L %d nb_rb_pdsch %d\n",N_bundle, L,nb_rb_pdsch);

  if (symbol==start_symbol)
	  nb_re = 6;
  else
	  nb_re = 12;


  AssertFatal(llr!=NULL,"nr_dlsch_deinterleaving: FATAL llr is Null\n");


  for (c =0; c< C; c++){
	  for (r=0; r<R;r++){
		  bundle_idx = r*C+c;
		  bundle_deint[bundle_idx] = c*R+r;
		  //printf("c %u r %u bundle_idx %u bundle_deinter %u\n", c, r, bundle_idx, bundle_deint[bundle_idx]);
	  }
  }

  for (k=0; k<N_bundle;k++)
  {
	  for (m=0; m<nb_re*L;m++){
		  llr_deint[bundle_deint[k]*nb_re*L+m]= llr[k*nb_re*L+m];
		  //printf("k %d m %d bundle_deint %d llr_deint %d\n", k, m, bundle_deint[k], llr_deint[bundle_deint[k]*nb_re*L+m]);
	  }
  }
  free(bundle_deint);
}

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

void nr_dlsch_channel_compensation(int **rxdataF_ext,
                                int **dl_ch_estimates_ext,
                                int **dl_ch_mag,
                                int **dl_ch_magb,
                                int **dl_ch_magr,
                                int **rxdataF_comp,
                                int ***rho,
                                NR_DL_FRAME_PARMS *frame_parms,
                                uint8_t nb_aatx,
                                unsigned char symbol,
                                int length,
                                uint8_t first_symbol_flag,
                                unsigned char mod_order,
                                unsigned short nb_rb,
                                unsigned char output_shift,
                                PHY_NR_MEASUREMENTS *measurements)
{

#if defined(__i386) || defined(__x86_64)

  unsigned short rb;
  unsigned char aatx,aarx,atx;
  __m128i *dl_ch128,*dl_ch128_2,*dl_ch_mag128,*dl_ch_mag128b,*dl_ch_mag128r,*rxdataF128,*rxdataF_comp128,*rho128;
  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp128={0},QAM_amp128b={0},QAM_amp128r={0};

  uint32_t nb_rb_0 = length/12 + ((length%12)?1:0);
  for (aatx=0; aatx<nb_aatx; aatx++) {
    if (mod_order == 4) {
      QAM_amp128 = _mm_set1_epi16(QAM16_n1);  // 2/sqrt(10)
      QAM_amp128b = _mm_setzero_si128();
      QAM_amp128r = _mm_setzero_si128();
    } else if (mod_order == 6) {
      QAM_amp128  = _mm_set1_epi16(QAM64_n1); //
      QAM_amp128b = _mm_set1_epi16(QAM64_n2);
      QAM_amp128r = _mm_setzero_si128();
    } else if (mod_order == 8) {
      QAM_amp128 = _mm_set1_epi16(QAM256_n1);
      QAM_amp128b = _mm_set1_epi16(QAM256_n2);
      QAM_amp128r = _mm_set1_epi16(QAM256_n3);
    }

    //    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*frame_parms->nb_antennas_rx)+aarx][symbol*nb_rb*12];
      dl_ch_mag128      = (__m128i *)&dl_ch_mag[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*nb_rb*12];
      dl_ch_mag128b     = (__m128i *)&dl_ch_magb[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*nb_rb*12];
      dl_ch_mag128r     = (__m128i *)&dl_ch_magr[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*nb_rb*12];
      rxdataF128        = (__m128i *)&rxdataF_ext[aarx][symbol*nb_rb*12];
      rxdataF_comp128   = (__m128i *)&rxdataF_comp[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*nb_rb*12];

      for (rb=0; rb<nb_rb_0; rb++) {
        if (mod_order>2) {
          // get channel amplitude if not QPSK

          mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128[0]);
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);

          mmtmpD1 = _mm_madd_epi16(dl_ch128[1],dl_ch128[1]);
          mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);

          mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1); //|H[0]|^2 |H[1]|^2 |H[2]|^2 |H[3]|^2 |H[4]|^2 |H[5]|^2 |H[6]|^2 |H[7]|^2

          // store channel magnitude here in a new field of dlsch

          dl_ch_mag128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
          dl_ch_mag128b[0] = dl_ch_mag128[0];
          dl_ch_mag128r[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);

          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);

          dl_ch_mag128r[0] = _mm_mulhi_epi16(dl_ch_mag128r[0],QAM_amp128r);
          dl_ch_mag128r[0] = _mm_slli_epi16(dl_ch_mag128r[0],1);

    //print_ints("Re(ch):",(int16_t*)&mmtmpD0);
    //print_shorts("QAM_amp:",(int16_t*)&QAM_amp128);
    //print_shorts("mag:",(int16_t*)&dl_ch_mag128[0]);
          dl_ch_mag128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
          dl_ch_mag128b[1] = dl_ch_mag128[1];
          dl_ch_mag128r[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);

          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);

          dl_ch_mag128r[1] = _mm_mulhi_epi16(dl_ch_mag128r[1],QAM_amp128r);
          dl_ch_mag128r[1] = _mm_slli_epi16(dl_ch_mag128r[1],1);

          mmtmpD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128[2]);//[H_I(0)^2+H_Q(0)^2 H_I(1)^2+H_Q(1)^2 H_I(2)^2+H_Q(2)^2 H_I(3)^2+H_Q(3)^2]
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
          mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);//[|H(0)|^2 |H(1)|^2 |H(2)|^2 |H(3)|^2 |H(0)|^2 |H(1)|^2 |H(2)|^2 |H(3)|^2]

          dl_ch_mag128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);//[|H(0)|^2 |H(0)|^2 |H(1)|^2 |H(1)|^2 |H(2)|^2 |H(2)|^2 |H(3)|^2 |H(3)|^2]
          dl_ch_mag128b[2] = dl_ch_mag128[2];
          dl_ch_mag128r[2] = dl_ch_mag128[2];

          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);

          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);

          dl_ch_mag128r[2] = _mm_mulhi_epi16(dl_ch_mag128r[2],QAM_amp128r);
          dl_ch_mag128r[2] = _mm_slli_epi16(dl_ch_mag128r[2],1);
        }

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);
        //  print_ints("re",&mmtmpD0);

        // 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);

#ifdef DEBUG_DLSCH_DEMOD
        printf("%%arx%d atx%d rb_index %d symbol %d shift %d\n",aarx,aatx,rb,symbol,output_shift);
        printf("rx_%d(%d,:)",aarx+1,rb+1);
        print_shorts("  ",(int16_t *)&rxdataF128[0]);
        printf("ch_%d%d(%d,:)",aarx+1,aatx+1,rb+1);
        print_shorts("  ",(int16_t *)&dl_ch128[0]);
        printf("rx_comp_%d%d(%d,:)",aarx+1,aatx+1,rb+1);
        print_shorts("  ",(int16_t *)&rxdataF_comp128[0]);
#endif

        // 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);

        rxdataF_comp128[1] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //print_shorts("rx:",(int16_t*)&rxdataF128[1]);
        //print_shorts("ch:",(int16_t*)&dl_ch128[1]);
        //print_shorts("pack:",(int16_t*)&rxdataF_comp128[1]);

        // 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);

        rxdataF_comp128[2] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
        //print_shorts("rx:",(int16_t*)&rxdataF128[2]);
        //print_shorts("ch:",(int16_t*)&dl_ch128[2]);
        //print_shorts("pack:",(int16_t*)&rxdataF_comp128[2]);

        dl_ch128+=3;
        dl_ch_mag128+=3;
        dl_ch_mag128b+=3;
        dl_ch_mag128r+=3;
        rxdataF128+=3;
        rxdataF_comp128+=3;
      }
    }
  }
  if (rho) {
    //we compute the Tx correlation matrix for each Rx antenna
    //As an example the 2x2 MIMO case requires
    //rho[aarx][nb_aatx*nb_aatx] = [cov(H_aarx_0,H_aarx_0) cov(H_aarx_0,H_aarx_1)
    //                              cov(H_aarx_1,H_aarx_0) cov(H_aarx_1,H_aarx_1)], aarx=0,...,nb_antennas_rx-1

    int avg_rho_re[frame_parms->nb_antennas_rx][nb_aatx*nb_aatx];
    int avg_rho_im[frame_parms->nb_antennas_rx][nb_aatx*nb_aatx];

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

      for (aatx=0; aatx<nb_aatx; aatx++) {
        dl_ch128      = (__m128i *)&dl_ch_estimates_ext[aatx*frame_parms->nb_antennas_rx+aarx][symbol*nb_rb*12];

        for (atx=0; atx<nb_aatx; atx++) {
          avg_rho_re[aarx][aatx*nb_aatx+atx] = 0;
          avg_rho_im[aarx][aatx*nb_aatx+atx] = 0;
          rho128        = (__m128i *)&rho[aarx][aatx*nb_aatx+atx][symbol*nb_rb*12];
          dl_ch128_2    = (__m128i *)&dl_ch_estimates_ext[atx*frame_parms->nb_antennas_rx+aarx][symbol*nb_rb*12];

          for (rb=0; rb<nb_rb_0; rb++) {
            // multiply by conjugated channel
            mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128_2[0]);
            //  print_ints("re",&mmtmpD0);
            // 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);
            //print_shorts("rx:",dl_ch128_2);
            //print_shorts("ch:",dl_ch128);
            //print_shorts("pack:",rho128);

            avg_rho_re[aarx][aatx*nb_aatx+atx] +=(((int16_t*)&rho128[0])[0]+
              ((int16_t*)&rho128[0])[2] +
              ((int16_t*)&rho128[0])[4] +
              ((int16_t*)&rho128[0])[6])/16;//

            avg_rho_im[aarx][aatx*nb_aatx+atx] +=(((int16_t*)&rho128[0])[1]+
              ((int16_t*)&rho128[0])[3] +
              ((int16_t*)&rho128[0])[5] +
              ((int16_t*)&rho128[0])[7])/16;//

            // 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);
            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
            avg_rho_re[aarx][aatx*nb_aatx+atx] +=(((int16_t*)&rho128[1])[0]+
              ((int16_t*)&rho128[1])[2] +
              ((int16_t*)&rho128[1])[4] +
              ((int16_t*)&rho128[1])[6])/16;

            avg_rho_im[aarx][aatx*nb_aatx+atx] +=(((int16_t*)&rho128[1])[1]+
              ((int16_t*)&rho128[1])[3] +
              ((int16_t*)&rho128[1])[5] +
              ((int16_t*)&rho128[1])[7])/16;

            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);

            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);
            avg_rho_re[aarx][aatx*nb_aatx+atx] +=(((int16_t*)&rho128[2])[0]+
              ((int16_t*)&rho128[2])[2] +
              ((int16_t*)&rho128[2])[4] +
              ((int16_t*)&rho128[2])[6])/16;

            avg_rho_im[aarx][aatx*nb_aatx+atx] +=(((int16_t*)&rho128[2])[1]+
              ((int16_t*)&rho128[2])[3] +
              ((int16_t*)&rho128[2])[5] +
              ((int16_t*)&rho128[2])[7])/16;

            dl_ch128+=3;
            dl_ch128_2+=3;
            rho128+=3;
          }
          if (first_symbol_flag==1) {
            //measurements->rx_correlation[0][0][aarx] = signal_energy(&rho[aarx][aatx*nb_aatx+atx][symbol*nb_rb*12],rb*12);
            avg_rho_re[aarx][aatx*nb_aatx+atx] = 16*avg_rho_re[aarx][aatx*nb_aatx+atx]/(nb_rb*12);
            avg_rho_im[aarx][aatx*nb_aatx+atx] = 16*avg_rho_im[aarx][aatx*nb_aatx+atx]/(nb_rb*12);
            //printf("rho[rx]%d tx%d tx%d = Re: %d Im: %d\n",aarx, aatx,atx, avg_rho_re[aarx][aatx*nb_aatx+atx], avg_rho_im[aarx][aatx*nb_aatx+atx]);
          }
        }
      }
    }
  }
  _mm_empty();
  _m_empty();

#elif defined(__arm__)

  unsigned short rb;
  unsigned char aatx,aarx,symbol_mod;

  int16x4_t *dl_ch128,*dl_ch128_2,*rxdataF128;
  int32x4_t mmtmpD0,mmtmpD1,mmtmpD0b,mmtmpD1b;
  int16x8_t *dl_ch_mag128,*dl_ch_mag128b,mmtmpD2,mmtmpD3,mmtmpD4;
  int16x8_t QAM_amp128,QAM_amp128b;
  int16x4x2_t *rxdataF_comp128,*rho128;

  int16_t conj[4]__attribute__((aligned(16))) = {1,-1,1,-1};
  int32x4_t output_shift128 = vmovq_n_s32(-(int32_t)output_shift);

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

  uint32_t nb_rb_0 = length/12 + ((length%12)?1:0);

  for (aatx=0; aatx<frame_parms->nb_antenna_ports_gNB; aatx++) {
    if (mod_order == 4) {
      QAM_amp128  = vmovq_n_s16(QAM16_n1);  // 2/sqrt(10)
      QAM_amp128b = vmovq_n_s16(0);
    } else if (mod_order == 6) {
      QAM_amp128  = vmovq_n_s16(QAM64_n1); //
      QAM_amp128b = vmovq_n_s16(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          = (int16x4_t*)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128      = (int16x8_t*)&dl_ch_mag[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch_mag128b     = (int16x8_t*)&dl_ch_magb[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF128        = (int16x4_t*)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128   = (int16x4x2_t*)&rxdataF_comp[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];

      for (rb=0; rb<nb_rb_0; rb++) {
  if (mod_order>2) {
    // get channel amplitude if not QPSK
    mmtmpD0 = vmull_s16(dl_ch128[0], dl_ch128[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_ch128[1], dl_ch128[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_ch128[2], dl_ch128[2]);
    mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
    mmtmpD1 = vmull_s16(dl_ch128[3], dl_ch128[3]);
    mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
    mmtmpD3 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));

    mmtmpD0 = vmull_s16(dl_ch128[4], dl_ch128[4]);
    mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
    mmtmpD1 = vmull_s16(dl_ch128[5], dl_ch128[5]);
    mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
    mmtmpD4 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));

    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);

    dl_ch_mag128b[2] = vqdmulhq_s16(mmtmpD4,QAM_amp128b);
    dl_ch_mag128[2]  = vqdmulhq_s16(mmtmpD4,QAM_amp128);
  }

  mmtmpD0 = vmull_s16(dl_ch128[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_ch128[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_ch128[0],*(int16x4_t*)conj)), rxdataF128[0]);
  //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])]
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch128[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_comp128[0] = vzip_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
  mmtmpD0 = vmull_s16(dl_ch128[2], rxdataF128[2]);
  mmtmpD1 = vmull_s16(dl_ch128[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_ch128[2],*(int16x4_t*)conj)), rxdataF128[2]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch128[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_comp128[1] = vzip_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));


  mmtmpD0 = vmull_s16(dl_ch128[4], rxdataF128[4]);
  mmtmpD1 = vmull_s16(dl_ch128[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_ch128[4],*(int16x4_t*)conj)), rxdataF128[4]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch128[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_comp128[2] = vzip_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));


  dl_ch128+=6;
  dl_ch_mag128+=3;
  dl_ch_mag128b+=3;
  rxdataF128+=6;
  rxdataF_comp128+=3;

      }
    }
  }

  if (rho) {
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      rho128        = (int16x4x2_t*)&rho[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128      = (int16x4_t*)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
      dl_ch128_2    = (int16x4_t*)&dl_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_DL*12];
      for (rb=0; rb<nb_rb_0; rb++) {
  mmtmpD0 = vmull_s16(dl_ch128[0], dl_ch128_2[0]);
  mmtmpD1 = vmull_s16(dl_ch128[1], dl_ch128_2[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_ch128[0],*(int16x4_t*)conj)), dl_ch128_2[0]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch128[1],*(int16x4_t*)conj)), dl_ch128_2[1]);
  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);
  rho128[0] = vzip_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));

  mmtmpD0 = vmull_s16(dl_ch128[2], dl_ch128_2[2]);
  mmtmpD1 = vmull_s16(dl_ch128[3], dl_ch128_2[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_ch128[2],*(int16x4_t*)conj)), dl_ch128_2[2]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch128[3],*(int16x4_t*)conj)), dl_ch128_2[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);
  rho128[1] = vzip_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));

  mmtmpD0 = vmull_s16(dl_ch128[0], dl_ch128_2[0]);
  mmtmpD1 = vmull_s16(dl_ch128[1], dl_ch128_2[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_ch128[4],*(int16x4_t*)conj)), dl_ch128_2[4]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(dl_ch128[5],*(int16x4_t*)conj)), dl_ch128_2[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);
  rho128[2] = vzip_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));


  dl_ch128+=6;
  dl_ch128_2+=6;
  rho128+=3;
      }

      if (first_symbol_flag==1) {
  measurements->rx_correlation[0][aarx] = signal_energy(&rho[aarx][symbol*frame_parms->N_RB_DL*12],rb*12);
      }
    }
  }
#endif
}

void nr_dlsch_channel_compensation_core(int **rxdataF_ext,
                                     int **dl_ch_estimates_ext,
                                     int **dl_ch_mag,
                                     int **dl_ch_magb,
                                     int **rxdataF_comp,
                                     int ***rho,
                                     unsigned char n_tx,
                                     unsigned char n_rx,
                                     unsigned char mod_order,
                                     unsigned char output_shift,
                                     int length,
                                     int start_point)

{

  unsigned short ii;
  int length_mod8 = 0;
  int length2;
  __m128i *dl_ch128,*dl_ch_mag128,*dl_ch_mag128b, *dl_ch128_2, *rxdataF128,*rxdataF_comp128,*rho128;
  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp128={0},QAM_amp128b={0};
  int aatx = 0, aarx = 0;

  for (aatx=0; aatx<n_tx; aatx++) {

    if (mod_order == 4) {
      QAM_amp128 = _mm_set1_epi16(QAM16_n1);  // 2/sqrt(10)
      QAM_amp128b = _mm_setzero_si128();
    } else if (mod_order == 6) {
      QAM_amp128  = _mm_set1_epi16(QAM64_n1); //
      QAM_amp128b = _mm_set1_epi16(QAM64_n2);
    }

    for (aarx=0; aarx<n_rx; aarx++) {
      /* TODO: hack to be removed. There is crash for 1 antenna case, so
       * for 1 antenna case, I put back the value 2 as it was before
       * Elena's commit.
       */
      int x = n_rx > 1 ? n_rx : 2;

    dl_ch128          = (__m128i *)&dl_ch_estimates_ext[aatx*x + aarx][start_point];
    dl_ch_mag128      = (__m128i *)&dl_ch_mag[aatx*x + aarx][start_point];
    dl_ch_mag128b     = (__m128i *)&dl_ch_magb[aatx*x + aarx][start_point];
    rxdataF128        = (__m128i *)&rxdataF_ext[aarx][start_point];
    rxdataF_comp128   = (__m128i *)&rxdataF_comp[aatx*x + aarx][start_point];

      length_mod8 = length&7;
      if (length_mod8 == 0){
        length2 = length>>3;

        for (ii=0; ii<length2; ++ii) {
          if (mod_order>2) {
            // get channel amplitude if not QPSK

            mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128[0]);
            mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);

            mmtmpD1 = _mm_madd_epi16(dl_ch128[1],dl_ch128[1]);
            mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);

            mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);

            // store channel magnitude here in a new field of dlsch

            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);
            //print_ints("Re(ch):",(int16_t*)&mmtmpD0);
            //print_shorts("QAM_amp:",(int16_t*)&QAM_amp128);
            //print_shorts("mag:",(int16_t*)&dl_ch_mag128[0]);
            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);

            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);

            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);

          }

          // multiply by conjugated channel
          mmtmpD0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);

          // 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);

          // 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);

          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);

          dl_ch128+=2;
          dl_ch_mag128+=2;
          dl_ch_mag128b+=2;
          rxdataF128+=2;
          rxdataF_comp128+=2;
        }
      }else {
        printf ("Channel Compensation: Received number of subcarriers is not multiple of 8, \n"
                 "need to adapt the code!\n");
      }
    }
  }

/*This part of code makes sense only for processing in 2x2 blocks*/
  if (rho) {


    for (aarx=0; aarx<n_rx; aarx++) {
      rho128        = (__m128i *)&rho[aarx][0][start_point];
      dl_ch128      = (__m128i *)&dl_ch_estimates_ext[aarx][start_point];
      dl_ch128_2    = (__m128i *)&dl_ch_estimates_ext[2+aarx][start_point];

      if (length_mod8 == 0){
        length2 = length>>3;

        for (ii=0; ii<length2; ++ii) {
          // multiply by conjugated channel
          mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128_2[0]);
          //  print_ints("re",&mmtmpD0);

          // 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);

          //print_shorts("rx:",dl_ch128_2);
          //print_shorts("ch:",dl_ch128);
          //print_shorts("pack:",rho128);

          // 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);

          rho128[1] =_mm_packs_epi32(mmtmpD2,mmtmpD3);
          dl_ch128+=2;
          dl_ch128_2+=2;
          rho128+=2;
        }
      }else {
        printf ("Channel Compensation: Received number of subcarriers is not multiple of 8, \n"
                 "need to adapt the code!\n");
      }
    }
  }
  _mm_empty();
  _m_empty();
}


void nr_dlsch_scale_channel(int **dl_ch_estimates_ext,
			    NR_DL_FRAME_PARMS *frame_parms,
			    uint8_t n_tx,
			    uint8_t n_rx,
			    NR_UE_DLSCH_t **dlsch_ue,
			    uint8_t symbol,
			    uint8_t pilots,
			    uint32_t len,
			    unsigned short nb_rb)
{

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

  short rb, ch_amp;
  unsigned char aatx,aarx;
  __m128i *dl_ch128, ch_amp128;

  uint32_t nb_rb_0 = len/12 + ((len%12)?1:0);

  // Determine scaling amplitude based the symbol

  ch_amp = 1024*8; //((pilots) ? (dlsch_ue[0]->sqrt_rho_b) : (dlsch_ue[0]->sqrt_rho_a));

  LOG_D(PHY,"Scaling PDSCH Chest in OFDM symbol %d by %d, pilots %d nb_rb %d NCP %d symbol %d\n",symbol,ch_amp,pilots,nb_rb,frame_parms->Ncp,symbol);
  // printf("Scaling PDSCH Chest in OFDM symbol %d by %d\n",symbol_mod,ch_amp);

  ch_amp128 = _mm_set1_epi16(ch_amp); // Q3.13

  for (aatx=0; aatx<n_tx; aatx++) {
    for (aarx=0; aarx<n_rx; aarx++) {

      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx*n_rx)+aarx][symbol*nb_rb*12];

      for (rb=0;rb<nb_rb_0;rb++) {

        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);

        dl_ch128[2] = _mm_mulhi_epi16(dl_ch128[2],ch_amp128);
        dl_ch128[2] = _mm_slli_epi16(dl_ch128[2],3);
        dl_ch128+=3;

      }
    }
  }

#elif defined(__arm__)

#endif
}


//compute average channel_level on each (TX,RX) antenna pair
void nr_dlsch_channel_level(int **dl_ch_estimates_ext,
			    NR_DL_FRAME_PARMS *frame_parms,
			    uint8_t n_tx,
			    int32_t *avg,
			    uint8_t symbol,
			    uint32_t len,
			    unsigned short nb_rb)
{

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

  short rb;
  unsigned char aatx,aarx;
  __m128i *dl_ch128, avg128D;

  //nb_rb*nre = y * 2^x
  int16_t x = factor2(len);
  //x = (x>4) ? 4 : x;
  int16_t y = (len)>>x;
  //printf("len = %d = %d * 2^(%d)\n",len,y,x);
  uint32_t nb_rb_0 = len/12 + ((len%12)?1:0);

  AssertFatal(y!=0,"Cannot divide by zero: in function %s of file %s\n", __func__, __FILE__);

  for (aatx=0; aatx<n_tx; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      //clear average level
      avg128D = _mm_setzero_si128();

      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*nb_rb*12];

      for (rb=0;rb<nb_rb_0;rb++) {
        avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[0],dl_ch128[0]),x));
        avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[1],dl_ch128[1]),x));
        avg128D = _mm_add_epi32(avg128D,_mm_srai_epi32(_mm_madd_epi16(dl_ch128[2],dl_ch128[2]),x));
        dl_ch128+=3;
      }

      avg[(aatx*frame_parms->nb_antennas_rx)+aarx] =(((int32_t*)&avg128D)[0] +
                            ((int32_t*)&avg128D)[1] +
                            ((int32_t*)&avg128D)[2] +
			      ((int32_t*)&avg128D)[3])/y;
                //  printf("Channel level : %d\n",avg[(aatx<<1)+aarx]);
    }

  _mm_empty();
  _m_empty();

#elif defined(__arm__)

  short rb;
  unsigned char aatx,aarx,nre=12,symbol_mod;
  int32x4_t avg128D;
  int16x4_t *dl_ch128;

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
  uint32_t nb_rb_0 = len/12 + ((len%12)?1:0);
  for (aatx=0; aatx<frame_parms->nb_antenna_ports_gNB; 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

      dl_ch128=(int16x4_t *)&dl_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_DL*12];

      for (rb=0; rb<nb_rb_0; 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]));

        if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->nb_antenna_ports_gNB!=1)) {
          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;
        }

        /*
          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==2) //assume start symbol 2
          nre=6;
      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]);
    }


#endif
}

void nr_dlsch_channel_level_median(int **dl_ch_estimates_ext,
                                int32_t *median,
                                int n_tx,
                                int n_rx,
                                int length,
                                int start_point)
{

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

  short ii;
  int aatx,aarx;
  int length2;
  int max = 0, min=0;
  int norm_pack;
  __m128i *dl_ch128, norm128D;

  for (aatx=0; aatx<n_tx; aatx++) {
    for (aarx=0; aarx<n_rx; aarx++) {
      max = median[aatx*n_rx + aarx];//initialize the med point for max
      min = median[aatx*n_rx + aarx];//initialize the med point for min
      norm128D = _mm_setzero_si128();

      dl_ch128=(__m128i *)&dl_ch_estimates_ext[aatx*n_rx + aarx][start_point];

      length2 = length>>2;//length = number of REs, hence length2=nb_REs*(32/128) in SIMD loop

      for (ii=0;ii<length2;ii++) {
        norm128D = _mm_srai_epi32( _mm_madd_epi16(dl_ch128[0],dl_ch128[0]), 2);//[|H_0|²/4 |H_1|²/4 |H_2|²/4 |H_3|²/4]
        //print_ints("norm128D",&norm128D[0]);

        norm_pack = ((int32_t*)&norm128D)[0] +
            ((int32_t*)&norm128D)[1] +
            ((int32_t*)&norm128D)[2] +
            ((int32_t*)&norm128D)[3];// compute the sum

        if (norm_pack > max)
          max = norm_pack;//store values more than max
        if (norm_pack < min)
          min = norm_pack;//store values less than min
        dl_ch128+=1;
      }

      median[aatx*n_rx + aarx]  = (max+min)>>1;
      //printf("Channel level  median [%d]: %d max = %d min = %d\n",aatx*n_rx + aarx, median[aatx*n_rx + aarx],max,min);
      }
  }

  _mm_empty();
  _m_empty();

#elif defined(__arm__)

  short rb;
  unsigned char aatx,aarx,nre=12,symbol_mod;
  int32x4_t norm128D;
  int16x4_t *dl_ch128;

  for (aatx=0; aatx<frame_parms->nb_antenna_ports_gNB; aatx++){
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      max = 0;
      min = 0;
      norm128D = vdupq_n_s32(0);

      dl_ch128=(int16x4_t *)&dl_ch_estimates_ext[aatx*n_rx + aarx][start_point];

      length_mod8=length&3;
      length2 = length>>2;

      for (ii=0;ii<length2;ii++) {
        norm128D = vshrq_n_u32(vmull_s16(dl_ch128[0],dl_ch128[0]), 1);
        norm_pack = ((int32_t*)&norm128D)[0] +
                    ((int32_t*)&norm128D)[1] +
                    ((int32_t*)&norm128D)[2] +
                    ((int32_t*)&norm128D)[3];

        if (norm_pack > max)
          max = norm_pack;
        if (norm_pack < min)
          min = norm_pack;

          dl_ch128+=1;
      }

        median[aatx*n_rx + aarx]  = (max+min)>>1;

      //printf("Channel level  median [%d]: %d\n",aatx*n_rx + aarx, median[aatx*n_rx + aarx]);
      }
    }
#endif

}

static void nr_dlsch_dual_stream_correlation_core(int **dl_ch_estimates_ext,
                                        int **dl_ch_estimates_ext_i,
                                        int **dl_ch_rho_ext,
                                        unsigned char n_tx,
                                        unsigned char n_rx,
                                        unsigned char output_shift,
                                        int length,
                                        int start_point)
{
#if defined(__x86_64__)||defined(__i386__)

  __m128i *dl_ch128,*dl_ch128i,*dl_ch_rho128,mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3;
  unsigned char aarx;
  int ii, length2, length_mod8;


  for (aarx=0; aarx<n_rx; aarx++) {

    dl_ch128          = (__m128i *)&dl_ch_estimates_ext[aarx][start_point];

    if (dl_ch_estimates_ext_i == NULL)
      dl_ch128i         = (__m128i *)&dl_ch_estimates_ext[aarx + n_rx][start_point];
    else
      dl_ch128i         = (__m128i *)&dl_ch_estimates_ext_i[aarx][start_point];

    dl_ch_rho128      = (__m128i *)&dl_ch_rho_ext[aarx][start_point];

    length_mod8 = length&7;

    if (length_mod8 == 0){
      length2 = length>>3;

      for (ii=0; ii<length2; ++ii) {
      // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128i[0]);
        //      print_ints("re",&mmtmpD0);
        // 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]);
        //      print_ints("im",&mmtmpD1);
        // 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);
        dl_ch_rho128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);
      // print_shorts("rho 0:",dl_ch_rho128);
        // 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);

        dl_ch128+=2;
        dl_ch128i+=2;
        dl_ch_rho128+=2;
      }

    }else {
        printf ("Channel Correlarion: Received number of subcarriers is not multiple of 8, \n"
                 "need to adapt the code!\n");
      }

  }

  _mm_empty();
  _m_empty();

#elif defined(__arm__)

#endif
}

void nr_dlsch_detection_mrc_core(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 n_tx,
                              unsigned char n_rx,
                              int length,
                              int start_point)
{

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

  unsigned char aatx;
  int i;
  __m128i *rxdataF_comp128_0, *rxdataF_comp128_1, *rxdataF_comp128_2, *rxdataF_comp128_3;
  __m128i *dl_ch_mag128_0, *dl_ch_mag128_1, *dl_ch_mag128_2, *dl_ch_mag128_3;
  __m128i *dl_ch_mag128_0b, *dl_ch_mag128_1b,  *dl_ch_mag128_2b,  *dl_ch_mag128_3b;
  __m128i *rho128_0, *rho128_1, *rho128_2=NULL, *rho128_3=NULL;
  __m128i *rho128_i0, *rho128_i1, *rho128_i2=NULL, *rho128_i3=NULL;
  int length_mod4 = 0;
  int length2;

  if (n_rx>1) {

    for (aatx=0; aatx<n_tx; aatx++) {

      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx<<1)][start_point];
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx<<1)+1][start_point];
      dl_ch_mag128_0      = (__m128i *)&dl_ch_mag[(aatx<<1)][start_point];
      dl_ch_mag128_1      = (__m128i *)&dl_ch_mag[(aatx<<1)+1][start_point];
      dl_ch_mag128_0b     = (__m128i *)&dl_ch_magb[(aatx<<1)][start_point];
      dl_ch_mag128_1b     = (__m128i *)&dl_ch_magb[(aatx<<1)+1][start_point];

      if (length_mod4 == 0){
        length2 = length>>2;

        for (i=0; i<length2; ++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));
        }
      }
    }


    if (rho) {
      rho128_0 = (__m128i *) &rho[0][start_point];
      rho128_1 = (__m128i *) &rho[1][start_point];

      if (n_tx == 4){
        rho128_2 = (__m128i *) &rho[2][start_point];
        rho128_3 = (__m128i *) &rho[3][start_point];
      }
        if (length_mod4 == 0){
          length2 = length>>2;

          for (i=0; i<length2; ++i) {
            rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));
          if (n_tx == 4){
            rho128_2[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_2[i],1),_mm_srai_epi16(rho128_3[i],1));
          }
        }
      }
    }

    if (rho_i){
      rho128_i0 = (__m128i *) &rho_i[0][start_point];
      rho128_i1 = (__m128i *) &rho_i[1][start_point];
      if (n_tx == 4){
        rho128_i2 = (__m128i *) &rho_i[2][start_point];
        rho128_i3 = (__m128i *) &rho_i[3][start_point];
      }
      if (length_mod4 == 0){
        length2 = length>>2;

        for (i=0; i<length2; ++i){
          rho128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
          if (n_tx == 4){
            rho128_i2[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_i2[i],1),_mm_srai_epi16(rho128_i3[i],1));
          }
        }
      }
    }

      if (n_tx == 4){

      rxdataF_comp128_0 = (__m128i *)&rxdataF_comp[0][start_point];
      rxdataF_comp128_1 = (__m128i *)&rxdataF_comp[2][start_point];
      rxdataF_comp128_2 = (__m128i *)&rxdataF_comp[4][start_point];
      rxdataF_comp128_3 = (__m128i *)&rxdataF_comp[6][start_point];

      dl_ch_mag128_0 = (__m128i *)&dl_ch_mag[0][start_point];
      dl_ch_mag128_1 = (__m128i *)&dl_ch_mag[2][start_point];
      dl_ch_mag128_2 = (__m128i *)&dl_ch_mag[4][start_point];
      dl_ch_mag128_3 = (__m128i *)&dl_ch_mag[6][start_point];

      dl_ch_mag128_0b = (__m128i *)&dl_ch_magb[0][start_point];
      dl_ch_mag128_1b = (__m128i *)&dl_ch_magb[2][start_point];
      dl_ch_mag128_2b = (__m128i *)&dl_ch_magb[4][start_point];
      dl_ch_mag128_3b = (__m128i *)&dl_ch_magb[6][start_point];

      rho128_0 = (__m128i *)&rho[0][start_point];
      rho128_1 = (__m128i *)&rho[2][start_point];

      rho128_i0 = (__m128i *)&rho_i[0][start_point];
      rho128_i1 = (__m128i *)&rho_i[2][start_point];


      if (length_mod4 == 0){

        length2 = length>>2;

        for (i=0; i<length2; ++i) {
          rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
          rxdataF_comp128_2[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_2[i],1),_mm_srai_epi16(rxdataF_comp128_3[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_2[i] = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_2[i],1),_mm_srai_epi16(dl_ch_mag128_3[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));
          dl_ch_mag128_2b[i] = _mm_adds_epi16(_mm_srai_epi16(dl_ch_mag128_2b[i],1),_mm_srai_epi16(dl_ch_mag128_3b[i],1));

          rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));

          rho128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
        }
    }
  }

  }

  _mm_empty();
  _m_empty();

#elif defined(__arm__)

  unsigned char aatx;
  int i;
  int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1,*dl_ch_mag128_0,*dl_ch_mag128_1,*dl_ch_mag128_0b,*dl_ch_mag128_1b,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
  int length_mod4 = 0;
  int length2;
  int ii=0;

  if (n_rx>1) {

    for (aatx=0; aatx<n_tx; aatx++) {

      rxdataF_comp128_0   = (int16x8_t *)&rxdataF_comp[(aatx<<1)][start_point];
      rxdataF_comp128_1   = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][start_point];
      dl_ch_mag128_0      = (int16x8_t *)&dl_ch_mag[(aatx<<1)][start_point];
      dl_ch_mag128_1      = (int16x8_t *)&dl_ch_mag[(aatx<<1)+1][start_point];
      dl_ch_mag128_0b     = (int16x8_t *)&dl_ch_magb[(aatx<<1)][start_point];
      dl_ch_mag128_1b     = (int16x8_t *)&dl_ch_magb[(aatx<<1)+1][start_point];

      if (length_mod4 == 0){
        length2 = length>>2;

        for (i=0; i<length2; ++ii) {
          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][start_point];
      rho128_1 = (int16x8_t *) &rho[1][start_point];

      if (length_mod4 == 0){
        length2 = length>>2;

        for (i=0; i<length2; ++i) {
          rho128_0[i] = vhaddq_s16(rho128_0[i],rho128_1[i]);
        }
      }
    }

    if (rho_i){

      rho128_i0 = (__m128i *) &rho_i[0][start_point];
      rho128_i1 = (__m128i *) &rho_i[1][start_point];

      if (length_mod4 == 0){
        length2 = length>>2;

        for (i=0; i<length2; ++i)
          rho128_i0[i] = vhaddq_s16(rho128_i0[i],rho128_i1[i]);

      }
    }
  }

  }

#endif
}

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

unsigned short nr_dlsch_extract_rbs_single(int **rxdataF,
                                           int **dl_ch_estimates,
                                           int **rxdataF_ext,
                                           int **dl_ch_estimates_ext,
                                           unsigned char symbol,
                                           uint8_t pilots,
                                           uint8_t config_type,
                                           unsigned short start_rb,
                                           unsigned short nb_rb_pdsch,
                                           uint8_t n_dmrs_cdm_groups,
                                           NR_DL_FRAME_PARMS *frame_parms,
                                           uint16_t dlDmrsSymbPos)
{

  unsigned short k,rb;
  unsigned char nushift,i,aarx;
  int *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;

  int8_t validDmrsEst = 0; //store last DMRS Symbol index

  unsigned char j=0;

  if (config_type==NFAPI_NR_DMRS_TYPE1) {
    AssertFatal(n_dmrs_cdm_groups == 1 || n_dmrs_cdm_groups == 2,
                "n_dmrs_cdm_groups %d is illegal\n",n_dmrs_cdm_groups);
    nushift = n_dmrs_cdm_groups -1;//delta in Table 7.4.1.1.2-1

  } else {
    AssertFatal(n_dmrs_cdm_groups == 1 || n_dmrs_cdm_groups == 2 || n_dmrs_cdm_groups == 3,
                "n_dmrs_cdm_groups %d is illegal\n",n_dmrs_cdm_groups);
    nushift = (n_dmrs_cdm_groups -1)<<1;//delta in Table 7.4.1.1.2-2
    }

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

    k = frame_parms->first_carrier_offset + NR_NB_SC_PER_RB*start_rb;

    validDmrsEst = get_valid_dmrs_idx_for_channel_est(dlDmrsSymbPos,symbol);

    dl_ch0     = &dl_ch_estimates[aarx][(validDmrsEst*(frame_parms->ofdm_symbol_size))];

    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(nb_rb_pdsch*12)];

    rxF_ext   = &rxdataF_ext[aarx][symbol*(nb_rb_pdsch*12)];
    rxF       = &rxdataF[aarx][(k+(symbol*(frame_parms->ofdm_symbol_size)))];
    
    for (rb = 0; rb < nb_rb_pdsch; rb++) {
      if (k>=frame_parms->ofdm_symbol_size) {
        k = k-frame_parms->ofdm_symbol_size;
        rxF = &rxdataF[aarx][(k+(symbol*(frame_parms->ofdm_symbol_size)))];
      }
      if (pilots==0) {
        memcpy((void*)rxF_ext,(void*)rxF,12*sizeof(*rxF_ext));
        memcpy((void*)dl_ch0_ext,(void*)dl_ch0,12*sizeof(*dl_ch0_ext));
        dl_ch0_ext+=12;
        rxF_ext+=12;
      } else {//the symbol contains DMRS
        j=0;
        if (config_type==NFAPI_NR_DMRS_TYPE1){
          if (nushift == 0) {//data is multiplexed
            for (i = (1-nushift); i<12; i+=2) {
              rxF_ext[j]=rxF[i];
              dl_ch0_ext[j]=dl_ch0[i];
              j++;
            }
            dl_ch0_ext+=6;
            rxF_ext+=6;
          }
        } else {//NFAPI_NR_DMRS_TYPE2
          for (i = (2+nushift); i<6; i++) {
            rxF_ext[j]=rxF[i];
            dl_ch0_ext[j]=dl_ch0[i];
            j++;
          }
          for (i = (8+nushift); i<12; i++) {
            rxF_ext[j]=rxF[i];
            dl_ch0_ext[j]=dl_ch0[i];
            j++;
          }
          dl_ch0_ext+= j;
          rxF_ext+= j;
        }
      }

      dl_ch0+=12;
      rxF+=12;
      k+=12;
      if (k>=frame_parms->ofdm_symbol_size) {
        k = k-(frame_parms->ofdm_symbol_size);
        rxF = &rxdataF[aarx][k+(symbol*(frame_parms->ofdm_symbol_size))];
      }
    }
  }
  return(nb_rb_pdsch);
}

unsigned short nr_dlsch_extract_rbs_multiple(int **rxdataF,
                                             int **dl_ch_estimates,
                                             int **rxdataF_ext,
                                             int **dl_ch_estimates_ext,
                                             unsigned char symbol,
                                             uint8_t pilots,
                                             uint8_t config_type,
                                             unsigned short start_rb,
                                             unsigned short nb_rb_pdsch,
                                             uint8_t n_dmrs_cdm_groups,
                                             uint8_t Nl,
                                             NR_DL_FRAME_PARMS *frame_parms,
                                             uint16_t dlDmrsSymbPos)
{

  unsigned short k,rb;
  unsigned char nushift,j,i,aarx,aatx;
  int *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;
  int8_t validDmrsEst = 0; //store last DMRS Symbol index

  if (config_type==NFAPI_NR_DMRS_TYPE1) {
    AssertFatal(n_dmrs_cdm_groups == 1 || n_dmrs_cdm_groups == 2,
                "n_dmrs_cdm_groups %d is illegal\n",n_dmrs_cdm_groups);
    nushift = n_dmrs_cdm_groups -1;//delta in Table 7.4.1.1.2-1
  } else {
    AssertFatal(n_dmrs_cdm_groups == 1 || n_dmrs_cdm_groups == 2 || n_dmrs_cdm_groups == 3,
                "n_dmrs_cdm_groups %d is illegal\n",n_dmrs_cdm_groups);
    nushift = (n_dmrs_cdm_groups -1)<<1;//delta in Table 7.4.1.1.2-2
  }

  validDmrsEst = get_valid_dmrs_idx_for_channel_est(dlDmrsSymbPos,symbol);

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

    k = frame_parms->first_carrier_offset + NR_NB_SC_PER_RB*start_rb;
    if (k>=frame_parms->ofdm_symbol_size)
      k = k-frame_parms->ofdm_symbol_size;

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

    for (aatx=0; aatx<Nl; aatx++) {

      dl_ch0     = &dl_ch_estimates[(aatx*frame_parms->nb_antennas_rx)+aarx][(validDmrsEst*(frame_parms->ofdm_symbol_size))];
      dl_ch0_ext = &dl_ch_estimates_ext[(aatx*frame_parms->nb_antennas_rx)+aarx][symbol*(nb_rb_pdsch*NR_NB_SC_PER_RB)];

      for (rb = 0; rb < nb_rb_pdsch; rb++)
      {
        if (pilots==0) {//data symbol only
          if (aatx==0) {//Extract Rx signal only
            memcpy((void*)rxF_ext,(void*)rxF,12*sizeof(*rxF_ext));
            rxF_ext+=12;
          }
          memcpy((void*)dl_ch0_ext,(void*)dl_ch0,12*sizeof(*dl_ch0_ext));//Extract Channel Estimate
          dl_ch0_ext+=12;
        }
        else {//the symbol contains DMRS
          j=0;
          if (config_type==NFAPI_NR_DMRS_TYPE1) {
            if (nushift == 0) {//data is multiplexed
              for (i = (1-nushift); i<12; i+=2) {
                if (aatx==0) rxF_ext[j]=rxF[i];
                dl_ch0_ext[j]=dl_ch0[i];
                j++;
              }
              dl_ch0_ext+=6;
              if (aatx==0) rxF_ext+=6;
            }
          }
          else {//NFAPI_NR_DMRS_TYPE2
            for (i = (2+nushift); i<6; i++) {
              if (aatx==0) rxF_ext[j]=rxF[i];
              dl_ch0_ext[j]=dl_ch0[i];
              j++;
            }
            for (i = (8+nushift); i<12; i++) {
              if (aatx==0) rxF_ext[j]=rxF[i];
              dl_ch0_ext[j]=dl_ch0[i];
              j++;
            }
            dl_ch0_ext+= j;
            if (aatx==0) rxF_ext+= j;
          }
        }

        dl_ch0+=12;
        if (aatx==0) {
          rxF+=12;
          k+=12;
          if (k>=frame_parms->ofdm_symbol_size) {
            k=k-(frame_parms->ofdm_symbol_size);
            rxF       = &rxdataF[aarx][k+(symbol*(frame_parms->ofdm_symbol_size))];
          }
        }
      }//rb
    }//aatx
  }//aarx
  return(nb_rb_pdsch);
}

void nr_dlsch_detection_mrc(int **rxdataF_comp,
                            int ***rho,
                            int **dl_ch_mag,
                            int **dl_ch_magb,
                            int **dl_ch_magr,
                            short n_tx,
                            short n_rx,
                            unsigned char symbol,
                            unsigned short nb_rb,
                            int length) {
#if defined(__x86_64__)||defined(__i386__)
  unsigned char aatx, aarx;
  int i;
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*dl_ch_mag128_0,*dl_ch_mag128_1,*dl_ch_mag128_0b,*dl_ch_mag128_1b,*dl_ch_mag128_0r,*dl_ch_mag128_1r;

  uint32_t nb_rb_0 = length/12 + ((length%12)?1:0);

  if (n_rx>1) {
    for (aatx=0; aatx<n_tx; aatx++) {
      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx*n_rx)][symbol*nb_rb*12];//aarx=0
      dl_ch_mag128_0      = (__m128i *)&dl_ch_mag[(aatx*n_rx)][symbol*nb_rb*12];//aarx=0
      dl_ch_mag128_0b     = (__m128i *)&dl_ch_magb[(aatx*n_rx)][symbol*nb_rb*12];
      dl_ch_mag128_0r     = (__m128i *)&dl_ch_magr[(aatx*n_rx)][symbol*nb_rb*12];
      for (aarx=1; aarx<n_rx; aarx++) {
        rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx*n_rx)+aarx][symbol*nb_rb*12];// aarx=1,..., n_rx-1
        dl_ch_mag128_1      = (__m128i *)&dl_ch_mag[(aatx*n_rx)+aarx][symbol*nb_rb*12];
        dl_ch_mag128_1b     = (__m128i *)&dl_ch_magb[(aatx*n_rx)+aarx][symbol*nb_rb*12];
        dl_ch_mag128_1r     = (__m128i *)&dl_ch_magr[(aatx*n_rx)+aarx][symbol*nb_rb*12];

        // MRC on each re of rb, both on MF output and magnitude (for 16QAM/64QAM/256 llr computation)
        for (i=0; i<nb_rb_0*3; i++) {
          rxdataF_comp128_0[i] = _mm_adds_epi16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
          dl_ch_mag128_0[i]    = _mm_adds_epi16(dl_ch_mag128_0[i],dl_ch_mag128_1[i]);
          dl_ch_mag128_0b[i]   = _mm_adds_epi16(dl_ch_mag128_0b[i],dl_ch_mag128_1b[i]);
          dl_ch_mag128_0r[i]   = _mm_adds_epi16(dl_ch_mag128_0r[i],dl_ch_mag128_1r[i]);
        }
      }
    }
#ifdef DEBUG_DLSCH_DEMOD
    for (i=0; i<nb_rb_0*3; i++) {
    printf("symbol%d RB %d\n",symbol,i/3);
    rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[0][symbol*nb_rb*12];
    rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[n_rx][symbol*nb_rb*12];
    print_shorts("tx 1 mrc_re/mrc_Im:",(int16_t*)&rxdataF_comp128_0[i]);
    print_shorts("tx 2 mrc_re/mrc_Im:",(int16_t*)&rxdataF_comp128_1[i]);
    // printf("mrc mag0 = %d = %d \n",((int16_t*)&dl_ch_mag128_0[0])[0],((int16_t*)&dl_ch_mag128_0[0])[1]);
    // printf("mrc mag0b = %d = %d \n",((int16_t*)&dl_ch_mag128_0b[0])[0],((int16_t*)&dl_ch_mag128_0b[0])[1]);
    }
#endif
    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_0*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));
      }*/
      }
    _mm_empty();
    _m_empty();
  }
#endif
}

/* Zero Forcing Rx function: nr_det_HhH()
 *
 *
 * */
void nr_det_HhH(int32_t *after_mf_00,//a
                int32_t *after_mf_01,//b
                int32_t *after_mf_10,//c
                int32_t *after_mf_11,//d
                int32_t *det_fin,//1/ad-bc
                unsigned short nb_rb,
                unsigned char symbol,
                int32_t shift)
{
  int16_t nr_conjug2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;
  unsigned short rb;
  __m128i *after_mf_00_128,*after_mf_01_128, *after_mf_10_128, *after_mf_11_128, ad_re_128, bc_re_128; //ad_im_128, bc_im_128;
  __m128i *det_fin_128, det_re_128; //det_im_128, tmp_det0, tmp_det1;

  after_mf_00_128 = (__m128i *)after_mf_00;
  after_mf_01_128 = (__m128i *)after_mf_01;
  after_mf_10_128 = (__m128i *)after_mf_10;
  after_mf_11_128 = (__m128i *)after_mf_11;

  det_fin_128 = (__m128i *)det_fin;

  for (rb=0; rb<3*nb_rb; rb++) {

    //complex multiplication (I_a+jQ_a)(I_d+jQ_d) = (I_aI_d - Q_aQ_d) + j(Q_aI_d + I_aQ_d)
    //The imag part is often zero, we compute only the real part
    ad_re_128 = _mm_sign_epi16(after_mf_00_128[0],*(__m128i*)&nr_conjug2[0]);
    ad_re_128 = _mm_madd_epi16(ad_re_128,after_mf_11_128[0]); //Re: I_a0*I_d0 - Q_a1*Q_d1
    //ad_im_128 = _mm_shufflelo_epi16(after_mf_00_128[0],_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
    //ad_im_128 = _mm_shufflehi_epi16(ad_im_128,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
    //ad_im_128 = _mm_madd_epi16(ad_im_128,after_mf_11_128[0]);//Im: (Q_aI_d + I_aQ_d)

    //complex multiplication (I_b+jQ_b)(I_c+jQ_c) = (I_bI_c - Q_bQ_c) + j(Q_bI_c + I_bQ_c)
    //The imag part is often zero, we compute only the real part
    bc_re_128 = _mm_sign_epi16(after_mf_01_128[0],*(__m128i*)&nr_conjug2[0]);
    bc_re_128 = _mm_madd_epi16(bc_re_128,after_mf_10_128[0]); //Re: I_b0*I_c0 - Q_b1*Q_c1
    //bc_im_128 = _mm_shufflelo_epi16(after_mf_01_128[0],_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_b0 Q_b1 I_b2 Q_b3]_64bits to [Q_b1 I_b0 Q_b3 I_b2]_64bits
    //bc_im_128 = _mm_shufflehi_epi16(bc_im_128,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_b0 Q_b1 I_b2 Q_b3]_64bits to [Q_b1 I_b0 Q_b3 I_b2]_64bits
    //bc_im_128 = _mm_madd_epi16(bc_im_128,after_mf_10_128[0]);//Im: (Q_bI_c + I_bQ_c)

    det_re_128 = _mm_sub_epi32(ad_re_128, bc_re_128);
    //det_im_128 = _mm_sub_epi32(ad_im_128, bc_im_128);

    //det in Q30 format
    det_fin_128[0] = _mm_abs_epi32(det_re_128);


#ifdef DEBUG_DLSCH_DEMOD
     printf("\n Computing det_HhH_inv \n");
     //print_ints("det_re_128:",(int32_t*)&det_re_128);
     //print_ints("det_im_128:",(int32_t*)&det_im_128);
     print_ints("det_fin_128:",(int32_t*)&det_fin_128[0]);
#endif
    det_fin_128+=1;
    after_mf_00_128+=1;
    after_mf_01_128+=1;
    after_mf_10_128+=1;
    after_mf_11_128+=1;
  }
  _mm_empty();
  _m_empty();
}

/* Zero Forcing Rx function: nr_inv_comp_muli
 * Complex number multi: z = x*y
 *                         = (x_re*y_re - x_im*y_im) + j(x_im*y_re + x_re*y_im)
 * */
__m128i nr_inv_comp_muli(__m128i input_x,
                         __m128i input_y)
{
  int16_t nr_conjug2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;

  __m128i xy_re_128, xy_im_128;
  __m128i output_z, tmp_z0, tmp_z1;

  // complex multiplication (x_re + jx_im)*(y_re + jy_im) = (x_re*y_re - x_im*y_im) + j(x_im*y_re + x_re*y_im)

  // the real part
  xy_re_128 = _mm_sign_epi16(input_x,*(__m128i*)&nr_conjug2[0]);
  xy_re_128 = _mm_madd_epi16(xy_re_128,input_y); //Re: (x_re*y_re - x_im*y_im)

  // the imag part
  xy_im_128 = _mm_shufflelo_epi16(input_x,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
  xy_im_128 = _mm_shufflehi_epi16(xy_im_128,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
  xy_im_128 = _mm_madd_epi16(xy_im_128,input_y);//Im: (x_im*y_re + x_re*y_im)

  //convert back to Q15 before packing
  xy_re_128 = _mm_srai_epi32(xy_re_128,4);//(2^15/64*2*16)
  xy_im_128 = _mm_srai_epi32(xy_im_128,4);

  tmp_z0  = _mm_unpacklo_epi32(xy_re_128,xy_im_128);
  //print_ints("unpack lo:",&tmp_z0[0]);
  tmp_z1  = _mm_unpackhi_epi32(xy_re_128,xy_im_128);
  //print_ints("unpack hi:",&tmp_z1[0]);
  output_z = _mm_packs_epi32(tmp_z0,tmp_z1);

  _mm_empty();
  _m_empty();
  return(output_z);
}

/* Zero Forcing Rx function: nr_conjch0_mult_ch1()
 *
 *
 * */
void nr_conjch0_mult_ch1(int *ch0,
                         int *ch1,
                         int32_t *ch0conj_ch1,
                         unsigned short nb_rb,
                         unsigned char output_shift0)
{
  //This function is used to compute multiplications in H_hermitian * H matrix
  short nr_conjugate[8]__attribute__((aligned(16))) = {-1,1,-1,1,-1,1,-1,1};
  unsigned short rb;
  __m128i *dl_ch0_128,*dl_ch1_128, *ch0conj_ch1_128, mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3;

  dl_ch0_128 = (__m128i *)ch0;
  dl_ch1_128 = (__m128i *)ch1;

  ch0conj_ch1_128 = (__m128i *)ch0conj_ch1;

  for (rb=0; rb<3*nb_rb; rb++) {

    mmtmpD0 = _mm_madd_epi16(dl_ch0_128[0],dl_ch1_128[0]);
    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*)&nr_conjugate[0]);
    mmtmpD1 = _mm_madd_epi16(mmtmpD1,dl_ch1_128[0]);
    mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift0);
    mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift0);
    mmtmpD2 = _mm_unpacklo_epi32(mmtmpD0,mmtmpD1);
    mmtmpD3 = _mm_unpackhi_epi32(mmtmpD0,mmtmpD1);

    ch0conj_ch1_128[0] = _mm_packs_epi32(mmtmpD2,mmtmpD3);

    /*printf("\n Computing conjugates \n");
    print_shorts("ch0:",(int16_t*)&dl_ch0_128[0]);
    print_shorts("ch1:",(int16_t*)&dl_ch1_128[0]);
    print_shorts("pack:",(int16_t*)&ch0conj_ch1_128[0]);*/

    dl_ch0_128+=1;
    dl_ch1_128+=1;
    ch0conj_ch1_128+=1;
  }
  _mm_empty();
  _m_empty();
}
__m128i nr_comp_muli_sum(__m128i input_x,
                         __m128i input_y,
                         __m128i input_w,
                         __m128i input_z,
                         __m128i det)
{
  int16_t nr_conjug2[8]__attribute__((aligned(16))) = {1,-1,1,-1,1,-1,1,-1} ;

  __m128i xy_re_128, xy_im_128, wz_re_128, wz_im_128;
  __m128i output, tmp_z0, tmp_z1;

  // complex multiplication (x_re + jx_im)*(y_re + jy_im) = (x_re*y_re - x_im*y_im) + j(x_im*y_re + x_re*y_im)
  // the real part
  xy_re_128 = _mm_sign_epi16(input_x,*(__m128i*)&nr_conjug2[0]);
  xy_re_128 = _mm_madd_epi16(xy_re_128,input_y); //Re: (x_re*y_re - x_im*y_im)

  // the imag part
  xy_im_128 = _mm_shufflelo_epi16(input_x,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
  xy_im_128 = _mm_shufflehi_epi16(xy_im_128,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
  xy_im_128 = _mm_madd_epi16(xy_im_128,input_y);//Im: (x_im*y_re + x_re*y_im)

  // complex multiplication (w_re + jw_im)*(z_re + jz_im) = (w_re*z_re - w_im*z_im) + j(w_im*z_re + w_re*z_im)
  // the real part
  wz_re_128 = _mm_sign_epi16(input_w,*(__m128i*)&nr_conjug2[0]);
  wz_re_128 = _mm_madd_epi16(wz_re_128,input_z); //Re: (w_re*z_re - w_im*z_im)

  // the imag part
  wz_im_128 = _mm_shufflelo_epi16(input_w,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the low 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
  wz_im_128 = _mm_shufflehi_epi16(wz_im_128,_MM_SHUFFLE(2,3,0,1));//permutes IQs for the high 64 bits as [I_a0 Q_a1 I_a2 Q_a3]_64bits to [Q_a1 I_a0 Q_a3 I_a2]_64bits
  wz_im_128 = _mm_madd_epi16(wz_im_128,input_z);//Im: (w_im*z_re + w_re*z_im)


  xy_re_128 = _mm_sub_epi32(xy_re_128, wz_re_128);
  xy_im_128 = _mm_sub_epi32(xy_im_128, wz_im_128);
  //print_ints("rx_re:",(int32_t*)&xy_re_128[0]);
  //print_ints("rx_Img:",(int32_t*)&xy_im_128[0]);
  //divide by matrix det and convert back to Q15 before packing
  int sum_det =0;
  for (int k=0; k<4;k++) {
    sum_det += ((((int *)&det[0])[k])>>2);
    //printf("det_%d = %d log2 =%d \n",k,(((int *)&det[0])[k]),log2_approx(((int *)&det[0])[k]));
    }

  xy_re_128 = _mm_slli_epi32(xy_re_128,5);
  xy_re_128 = _mm_srai_epi32(xy_re_128,log2_approx(sum_det));
  xy_re_128 = _mm_slli_epi32(xy_re_128,5);

  xy_im_128 = _mm_slli_epi32(xy_im_128,5);
  xy_im_128 = _mm_srai_epi32(xy_im_128,log2_approx(sum_det));
  xy_im_128 = _mm_slli_epi32(xy_im_128,5);

  tmp_z0  = _mm_unpacklo_epi32(xy_re_128,xy_im_128);
  //print_ints("unpack lo:",&tmp_z0[0]);
  tmp_z1  = _mm_unpackhi_epi32(xy_re_128,xy_im_128);
  //print_ints("unpack hi:",&tmp_z1[0]);
  output = _mm_packs_epi32(tmp_z0,tmp_z1);

  _mm_empty();
  _m_empty();
  return(output);
}
/* Zero Forcing Rx function: nr_construct_HhH_elements()
 *
 *
 * */
void nr_construct_HhH_elements(int *conjch00_ch00,
                               int *conjch01_ch01,
                               int *conjch11_ch11,
                               int *conjch10_ch10,//
                               int *conjch20_ch20,
                               int *conjch21_ch21,
                               int *conjch30_ch30,
                               int *conjch31_ch31,
                               int *conjch00_ch01,//00_01
                               int *conjch01_ch00,//01_00
                               int *conjch10_ch11,//10_11
                               int *conjch11_ch10,//11_10
                               int *conjch20_ch21,
                               int *conjch21_ch20,
                               int *conjch30_ch31,
                               int *conjch31_ch30,
                               int32_t *after_mf_00,
                               int32_t *after_mf_01,
                               int32_t *after_mf_10,
                               int32_t *after_mf_11,
                               unsigned short nb_rb,
                               unsigned char symbol)
{
  //This function is used to construct the (H_hermitian * H matrix) matrix elements
  unsigned short rb;
  __m128i *conjch00_ch00_128, *conjch01_ch01_128, *conjch11_ch11_128, *conjch10_ch10_128;
  __m128i *conjch20_ch20_128, *conjch21_ch21_128, *conjch30_ch30_128, *conjch31_ch31_128;
  __m128i *conjch00_ch01_128, *conjch01_ch00_128, *conjch10_ch11_128, *conjch11_ch10_128;
  __m128i *conjch20_ch21_128, *conjch21_ch20_128, *conjch30_ch31_128, *conjch31_ch30_128;
  __m128i *after_mf_00_128, *after_mf_01_128, *after_mf_10_128, *after_mf_11_128;

  conjch00_ch00_128 = (__m128i *)conjch00_ch00;
  conjch01_ch01_128 = (__m128i *)conjch01_ch01;
  conjch11_ch11_128 = (__m128i *)conjch11_ch11;
  conjch10_ch10_128 = (__m128i *)conjch10_ch10;

  conjch20_ch20_128 = (__m128i *)conjch20_ch20;
  conjch21_ch21_128 = (__m128i *)conjch21_ch21;
  conjch30_ch30_128 = (__m128i *)conjch30_ch30;
  conjch31_ch31_128 = (__m128i *)conjch31_ch31;

  conjch00_ch01_128 = (__m128i *)conjch00_ch01;
  conjch01_ch00_128 = (__m128i *)conjch01_ch00;
  conjch10_ch11_128 = (__m128i *)conjch10_ch11;
  conjch11_ch10_128 = (__m128i *)conjch11_ch10;

  conjch20_ch21_128 = (__m128i *)conjch20_ch21;
  conjch21_ch20_128 = (__m128i *)conjch21_ch20;
  conjch30_ch31_128 = (__m128i *)conjch30_ch31;
  conjch31_ch30_128 = (__m128i *)conjch31_ch30;

  after_mf_00_128 = (__m128i *)after_mf_00;
  after_mf_01_128 = (__m128i *)after_mf_01;
  after_mf_10_128 = (__m128i *)after_mf_10;
  after_mf_11_128 = (__m128i *)after_mf_11;

  for (rb=0; rb<3*nb_rb; rb++) {

    after_mf_00_128[0] =_mm_adds_epi16(conjch00_ch00_128[0],conjch10_ch10_128[0]);//00_00 + 10_10
    if (conjch20_ch20 != NULL) after_mf_00_128[0] =_mm_adds_epi16(after_mf_00_128[0],conjch20_ch20_128[0]);
    if (conjch30_ch30 != NULL) after_mf_00_128[0] =_mm_adds_epi16(after_mf_00_128[0],conjch30_ch30_128[0]);

    after_mf_11_128[0] =_mm_adds_epi16(conjch01_ch01_128[0], conjch11_ch11_128[0]); //01_01 + 11_11
    if (conjch21_ch21 != NULL) after_mf_11_128[0] =_mm_adds_epi16(after_mf_11_128[0],conjch21_ch21_128[0]);
    if (conjch31_ch31 != NULL) after_mf_11_128[0] =_mm_adds_epi16(after_mf_11_128[0],conjch31_ch31_128[0]);

    after_mf_01_128[0] =_mm_adds_epi16(conjch00_ch01_128[0], conjch10_ch11_128[0]);//00_01 + 10_11
    if (conjch20_ch21 != NULL) after_mf_01_128[0] =_mm_adds_epi16(after_mf_01_128[0],conjch20_ch21_128[0]);
    if (conjch30_ch31 != NULL) after_mf_01_128[0] =_mm_adds_epi16(after_mf_01_128[0],conjch30_ch31_128[0]);

    after_mf_10_128[0] =_mm_adds_epi16(conjch01_ch00_128[0], conjch11_ch10_128[0]);//01_00 + 11_10
    if (conjch21_ch20 != NULL) after_mf_10_128[0] =_mm_adds_epi16(after_mf_10_128[0],conjch21_ch20_128[0]);
    if (conjch31_ch30 != NULL) after_mf_10_128[0] =_mm_adds_epi16(after_mf_10_128[0],conjch31_ch30_128[0]);

#ifdef DEBUG_DLSCH_DEMOD
    if ((rb<=30))
    {
      printf(" \n construct_HhH_elements \n");
      print_shorts("after_mf_00_128:",(int16_t*)&after_mf_00_128[0]);
      print_shorts("after_mf_01_128:",(int16_t*)&after_mf_01_128[0]);
      print_shorts("after_mf_10_128:",(int16_t*)&after_mf_10_128[0]);
      print_shorts("after_mf_11_128:",(int16_t*)&after_mf_11_128[0]);
    }
#endif
    conjch00_ch00_128+=1;
    conjch10_ch10_128+=1;
    conjch01_ch01_128+=1;
    conjch11_ch11_128+=1;

    if (conjch20_ch20 != NULL) conjch20_ch20_128+=1;
    if (conjch21_ch21 != NULL) conjch21_ch21_128+=1;
    if (conjch30_ch30 != NULL) conjch30_ch30_128+=1;
    if (conjch31_ch31 != NULL) conjch31_ch31_128+=1;

    conjch00_ch01_128+=1;
    conjch01_ch00_128+=1;
    conjch10_ch11_128+=1;
    conjch11_ch10_128+=1;

    if (conjch20_ch21 != NULL) conjch20_ch21_128+=1;
    if (conjch21_ch20 != NULL) conjch21_ch20_128+=1;
    if (conjch30_ch31 != NULL) conjch30_ch31_128+=1;
    if (conjch31_ch30 != NULL) conjch31_ch30_128+=1;

    after_mf_00_128 += 1;
    after_mf_01_128 += 1;
    after_mf_10_128 += 1;
    after_mf_11_128 += 1;
  }
  _mm_empty();
  _m_empty();
}

/* Zero Forcing Rx function: nr_zero_forcing_rx_2layers()
 *
 *
 * */
uint8_t nr_zero_forcing_rx_2layers(int **rxdataF_comp,
                                   int **dl_ch_mag,
                                   int **dl_ch_magb,
                                   int **dl_ch_magr,
                                   int **dl_ch_estimates_ext,
                                   unsigned short nb_rb,
                                   unsigned char n_rx,
                                   unsigned char mod_order,
                                   int shift,
                                   unsigned char symbol,
                                   int length)
{
  int *ch00, *ch01, *ch10, *ch11;
  int *ch20, *ch30, *ch21, *ch31;
  uint32_t nb_rb_0 = length/12 + ((length%12)?1:0);
  /* we need at least alignment to 16 bytes, let's put 32 to be sure
   * (maybe not necessary but doesn't hurt)
   */
  int32_t conjch00_ch01[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch01_ch00[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch10_ch11[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch11_ch10[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch00_ch00[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch01_ch01[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch10_ch10[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch11_ch11[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch20_ch20[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch21_ch21[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch30_ch30[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch31_ch31[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch20_ch21[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch30_ch31[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch21_ch20[12*nb_rb] __attribute__((aligned(32)));
  int32_t conjch31_ch30[12*nb_rb] __attribute__((aligned(32)));

  int32_t af_mf_00[12*nb_rb] __attribute__((aligned(32)));
  int32_t af_mf_01[12*nb_rb] __attribute__((aligned(32)));
  int32_t af_mf_10[12*nb_rb] __attribute__((aligned(32)));
  int32_t af_mf_11[12*nb_rb] __attribute__((aligned(32)));
  int32_t determ_fin[12*nb_rb] __attribute__((aligned(32)));

  switch (n_rx) {
    case 2://
      ch00 = (int *)&dl_ch_estimates_ext[0][symbol*nb_rb*12];
      ch01 = (int *)&dl_ch_estimates_ext[2][symbol*nb_rb*12];
      ch10 = (int *)&dl_ch_estimates_ext[1][symbol*nb_rb*12];
      ch11 = (int *)&dl_ch_estimates_ext[3][symbol*nb_rb*12];
      ch20 = NULL;
      ch21 = NULL;
      ch30 = NULL;
      ch31 = NULL;
      break;

    case 4://
      ch00 = (int *)&dl_ch_estimates_ext[0][symbol*nb_rb*12];
      ch01 = (int *)&dl_ch_estimates_ext[4][symbol*nb_rb*12];
      ch10 = (int *)&dl_ch_estimates_ext[1][symbol*nb_rb*12];
      ch11 = (int *)&dl_ch_estimates_ext[5][symbol*nb_rb*12];
      ch20 = (int *)&dl_ch_estimates_ext[2][symbol*nb_rb*12];
      ch21 = (int *)&dl_ch_estimates_ext[6][symbol*nb_rb*12];
      ch30 = (int *)&dl_ch_estimates_ext[3][symbol*nb_rb*12];
      ch31 = (int *)&dl_ch_estimates_ext[7][symbol*nb_rb*12];
      break;

    default:
      return -1;
      break;
  }

  /* 1- Compute the rx channel matrix after compensation: (1/2^log2_max)x(H_herm x H)
   * for n_rx = 2
   * |conj_H_00       conj_H_10|    | H_00         H_01|   |(conj_H_00xH_00+conj_H_10xH_10)   (conj_H_00xH_01+conj_H_10xH_11)|
   * |                         |  x |                  | = |                                                                 |
   * |conj_H_01       conj_H_11|    | H_10         H_11|   |(conj_H_01xH_00+conj_H_11xH_10)   (conj_H_01xH_01+conj_H_11xH_11)|
   *
   */

  if (n_rx>=2){
    // (1/2^log2_maxh)*conj_H_00xH_00: (1/(64*2))conjH_00*H_00*2^15
    nr_conjch0_mult_ch1(ch00,
                        ch00,
                        conjch00_ch00,
                        nb_rb_0,
                        shift);
    // (1/2^log2_maxh)*conj_H_10xH_10: (1/(64*2))conjH_10*H_10*2^15
    nr_conjch0_mult_ch1(ch10,
                        ch10,
                        conjch10_ch10,
                        nb_rb_0,
                        shift);
    // conj_H_00xH_01
    nr_conjch0_mult_ch1(ch00,
                        ch01,
                        conjch00_ch01,
                        nb_rb_0,
                        shift); // this shift is equal to the channel level log2_maxh
    // conj_H_10xH_11
    nr_conjch0_mult_ch1(ch10,
                        ch11,
                        conjch10_ch11,
                        nb_rb_0,
                        shift);
    // conj_H_01xH_01
    nr_conjch0_mult_ch1(ch01,
                        ch01,
                        conjch01_ch01,
                        nb_rb_0,
                        shift);
    // conj_H_11xH_11
    nr_conjch0_mult_ch1(ch11,
                        ch11,
                        conjch11_ch11,
                        nb_rb_0,
                        shift);
    // conj_H_01xH_00
    nr_conjch0_mult_ch1(ch01,
                        ch00,
                        conjch01_ch00,
                        nb_rb_0,
                        shift);
    // conj_H_11xH_10
    nr_conjch0_mult_ch1(ch11,
                        ch10,
                        conjch11_ch10,
                        nb_rb_0,
                        shift);
  }
  if (n_rx==4){
    // (1/2^log2_maxh)*conj_H_20xH_20: (1/(64*2*16))conjH_20*H_20*2^15
    nr_conjch0_mult_ch1(ch20,
                        ch20,
                        conjch20_ch20,
                        nb_rb_0,
                        shift);

    // (1/2^log2_maxh)*conj_H_30xH_30: (1/(64*2*4))conjH_30*H_30*2^15
    nr_conjch0_mult_ch1(ch30,
                        ch30,
                        conjch30_ch30,
                        nb_rb_0,
                        shift);

    // (1/2^log2_maxh)*conj_H_20xH_20: (1/(64*2))conjH_20*H_20*2^15
    nr_conjch0_mult_ch1(ch20,
                        ch21,
                        conjch20_ch21,
                        nb_rb_0,
                        shift);

    nr_conjch0_mult_ch1(ch30,
                        ch31,
                        conjch30_ch31,
                        nb_rb_0,
                        shift);

    nr_conjch0_mult_ch1(ch21,
                        ch21,
                        conjch21_ch21,
                        nb_rb_0,
                        shift);

    nr_conjch0_mult_ch1(ch31,
                        ch31,
                        conjch31_ch31,
                        nb_rb_0,
                        shift);

    // (1/2^log2_maxh)*conj_H_20xH_20: (1/(64*2))conjH_20*H_20*2^15
    nr_conjch0_mult_ch1(ch21,
                        ch20,
                        conjch21_ch20,
                        nb_rb_0,
                        shift);

    nr_conjch0_mult_ch1(ch31,
                        ch30,
                        conjch31_ch30,
                        nb_rb_0,
                        shift);

    nr_construct_HhH_elements(conjch00_ch00,
                              conjch01_ch01,
                              conjch11_ch11,
                              conjch10_ch10,//
                              conjch20_ch20,
                              conjch21_ch21,
                              conjch30_ch30,
                              conjch31_ch31,
                              conjch00_ch01,
                              conjch01_ch00,
                              conjch10_ch11,
                              conjch11_ch10,//
                              conjch20_ch21,
                              conjch21_ch20,
                              conjch30_ch31,
                              conjch31_ch30,
                              af_mf_00,
                              af_mf_01,
                              af_mf_10,
                              af_mf_11,
                              nb_rb_0,
                              symbol);
  }
  if (n_rx==2){
    nr_construct_HhH_elements(conjch00_ch00,
                              conjch01_ch01,
                              conjch11_ch11,
                              conjch10_ch10,//
                              NULL,
                              NULL,
                              NULL,
                              NULL,
                              conjch00_ch01,
                              conjch01_ch00,
                              conjch10_ch11,
                              conjch11_ch10,//
                              NULL,
                              NULL,
                              NULL,
                              NULL,
                              af_mf_00,
                              af_mf_01,
                              af_mf_10,
                              af_mf_11,
                              nb_rb_0,
                              symbol);
  }
  //det_HhH = ad -bc
  nr_det_HhH(af_mf_00,//a
             af_mf_01,//b
             af_mf_10,//c
             af_mf_11,//d
             determ_fin,
             nb_rb_0,
             symbol,
             shift);
  /* 2- Compute the channel matrix inversion **********************************
   *
     *    |(conj_H_00xH_00+conj_H_10xH_10)   (conj_H_00xH_01+conj_H_10xH_11)|
     * A= |                                                                 |
     *    |(conj_H_01xH_00+conj_H_11xH_10)   (conj_H_01xH_01+conj_H_11xH_11)|
     *
     *
     *
     *inv(A) =(1/det)*[d  -b
     *                 -c  a]
     *
     *
     **************************************************************************/
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*dl_ch_mag128_0=NULL,*dl_ch_mag128b_0=NULL,*dl_ch_mag128r_0=NULL,*determ_fin_128;//*dl_ch_mag128_1,*dl_ch_mag128b_1,*dl_ch_mag128r_1
  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3;
  __m128i *after_mf_a_128,*after_mf_b_128, *after_mf_c_128, *after_mf_d_128;
  __m128i QAM_amp128={0},QAM_amp128b={0},QAM_amp128r={0};

  determ_fin_128      = (__m128i *)&determ_fin[0];

  rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[0][symbol*nb_rb*12];//aatx=0 @ aarx =0
  rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[n_rx][symbol*nb_rb*12];//aatx=1 @ aarx =0

  after_mf_a_128 = (__m128i *)af_mf_00;
  after_mf_b_128 = (__m128i *)af_mf_01;
  after_mf_c_128 = (__m128i *)af_mf_10;
  after_mf_d_128 = (__m128i *)af_mf_11;

  if (mod_order>2) {
    if (mod_order == 4) {
      QAM_amp128 = _mm_set1_epi16(QAM16_n1);  //2/sqrt(10)
      QAM_amp128b = _mm_setzero_si128();
      QAM_amp128r = _mm_setzero_si128();
    } else if (mod_order == 6) {
      QAM_amp128  = _mm_set1_epi16(QAM64_n1); //4/sqrt{42}
      QAM_amp128b = _mm_set1_epi16(QAM64_n2); //2/sqrt{42}
      QAM_amp128r = _mm_setzero_si128();
    } else if (mod_order == 8) {
      QAM_amp128 = _mm_set1_epi16(QAM256_n1); //8/sqrt{170}
      QAM_amp128b = _mm_set1_epi16(QAM256_n2);//4/sqrt{170}
      QAM_amp128r = _mm_set1_epi16(QAM256_n3);//2/sqrt{170}
      }
    dl_ch_mag128_0      = (__m128i *)&dl_ch_mag[0][symbol*nb_rb*12];
    dl_ch_mag128b_0     = (__m128i *)&dl_ch_magb[0][symbol*nb_rb*12];
    dl_ch_mag128r_0     = (__m128i *)&dl_ch_magr[0][symbol*nb_rb*12];
  }

  for (int rb=0; rb<3*nb_rb_0; rb++) {
    if (mod_order>2) {
      int sum_det =0;
      for (int k=0; k<4;k++) {
        sum_det += ((((int *)&determ_fin_128[0])[k])>>2);
        //printf("det_%d = %d\n",k,sum_det);
        }

      mmtmpD2 = _mm_slli_epi32(determ_fin_128[0],5);
      mmtmpD2 = _mm_srai_epi32(mmtmpD2,log2_approx(sum_det));
      mmtmpD2 = _mm_slli_epi32(mmtmpD2,5);

      mmtmpD3 = _mm_unpacklo_epi32(mmtmpD2,mmtmpD2);

      mmtmpD2 = _mm_unpackhi_epi32(mmtmpD2,mmtmpD2);

      mmtmpD2 = _mm_packs_epi32(mmtmpD3,mmtmpD2);

      dl_ch_mag128_0[0] = mmtmpD2;
      dl_ch_mag128b_0[0] = mmtmpD2;
      dl_ch_mag128r_0[0] = mmtmpD2;

      dl_ch_mag128_0[0] = _mm_mulhi_epi16(dl_ch_mag128_0[0],QAM_amp128);
      dl_ch_mag128_0[0] = _mm_slli_epi16(dl_ch_mag128_0[0],1);

      dl_ch_mag128b_0[0] = _mm_mulhi_epi16(dl_ch_mag128b_0[0],QAM_amp128b);
      dl_ch_mag128b_0[0] = _mm_slli_epi16(dl_ch_mag128b_0[0],1);

      dl_ch_mag128r_0[0] = _mm_mulhi_epi16(dl_ch_mag128r_0[0],QAM_amp128r);
      dl_ch_mag128r_0[0] = _mm_slli_epi16(dl_ch_mag128r_0[0],1);

      //print_shorts("mag layer 1:",(int16_t*)&dl_ch_mag128_0[0]);
      //print_shorts("mag layer 2:",(int16_t*)&dl_ch_mag128_1[0]);
      //print_shorts("magb layer 1:",(int16_t*)&dl_ch_mag128b_0[0]);
      //print_shorts("magb layer 2:",(int16_t*)&dl_ch_mag128b_1[0]);
      //print_shorts("magr layer 1:",(int16_t*)&dl_ch_mag128r_0[0]);
      //print_shorts("magr layer 2:",(int16_t*)&dl_ch_mag128r_1[0]);
    }
    // multiply by channel Inv
    //rxdataF_zf128_0 = rxdataF_comp128_0*d - b*rxdataF_comp128_1
    //rxdataF_zf128_1 = rxdataF_comp128_1*a - c*rxdataF_comp128_0
    //printf("layer_1 \n");
    mmtmpD0 = nr_comp_muli_sum(rxdataF_comp128_0[0],
                               after_mf_d_128[0],
                               rxdataF_comp128_1[0],
                               after_mf_b_128[0],
                               determ_fin_128[0]);

    //printf("layer_2 \n");
    mmtmpD1 = nr_comp_muli_sum(rxdataF_comp128_1[0],
                               after_mf_a_128[0],
                               rxdataF_comp128_0[0],
                               after_mf_c_128[0],
                               determ_fin_128[0]);

    rxdataF_comp128_0[0] = mmtmpD0;
    rxdataF_comp128_1[0] = mmtmpD1;
#ifdef DEBUG_DLSCH_DEMOD
    printf("\n Rx signal after ZF l%d rb%d\n",symbol,rb);
    print_shorts(" Rx layer 1:",(int16_t*)&rxdataF_comp128_0[0]);
    print_shorts(" Rx layer 2:",(int16_t*)&rxdataF_comp128_1[0]);
#endif
    determ_fin_128 += 1;
    dl_ch_mag128_0 += 1;
    dl_ch_mag128b_0 += 1;
    dl_ch_mag128r_0 += 1;
    rxdataF_comp128_0 += 1;
    rxdataF_comp128_1 += 1;
    after_mf_a_128 += 1;
    after_mf_b_128 += 1;
    after_mf_c_128 += 1;
    after_mf_d_128 += 1;
  }
  _mm_empty();
  _m_empty();
   return(0);
}

static void nr_dlsch_layer_demapping(int16_t **llr_cw,
				     uint8_t Nl,
				     uint8_t mod_order,
				     uint32_t length,
				     int32_t codeword_TB0,
				     int32_t codeword_TB1,
				     int16_t **llr_layers) {

  switch (Nl) {
    case 1:
      if (codeword_TB1 == -1)
        memcpy((void*)llr_cw[0], (void*)llr_layers[0], (length)*sizeof(int16_t));
      else if (codeword_TB0 == -1)
        memcpy((void*)llr_cw[1], (void*)llr_layers[0], (length)*sizeof(int16_t));

    break;

    case 2:
    case 3:
    case 4:
      for (int i=0; i<(length/Nl/mod_order); i++){
        for (int l=0; l<Nl; l++) {
          for (int m=0; m<mod_order; m++){
            if (codeword_TB1 == -1)
              llr_cw[0][Nl*mod_order*i+l*mod_order+m] = llr_layers[l][i*mod_order+m];//i:0 -->0 1 2 3
            else if (codeword_TB0 == -1)
              llr_cw[1][Nl*mod_order*i+l*mod_order+m] = llr_layers[l][i*mod_order+m];//i:0 -->0 1 2 3
            //if (i<4) printf("length%d: llr_layers[l%d][m%d]=%d: \n",length,l,m,llr_layers[l][i*mod_order+m]);
            }
          }
        }
    break;

  default:
  AssertFatal(0, "Not supported number of layers %d\n", Nl);
  }
}

static int nr_dlsch_llr(NR_UE_PDSCH **pdsch_vars,
                        NR_DL_FRAME_PARMS *frame_parms,
                        int32_t **rxdataF_comp_ptr,
                        int32_t **dl_ch_mag_ptr,
                        NR_DL_UE_HARQ_t *dlsch0_harq,
                        NR_DL_UE_HARQ_t *dlsch1_harq,
                        RX_type_t rx_type,
                        unsigned char harq_pid,
                        unsigned char gNB_id,
                        unsigned char gNB_id_i,
                        unsigned char first_symbol_flag,
                        unsigned char symbol,
                        unsigned short nb_rb,
                        unsigned short round,
                        int32_t codeword_TB0,
                        int32_t codeword_TB1,
                        uint32_t len,
                        uint8_t nr_slot_rx,
                        uint8_t beamforming_mode)
{

  int16_t  *pllr_symbol_cw0;
  int16_t  *pllr_symbol_cw1;
  int16_t  *pllr_symbol_layer0;
  int16_t  *pllr_symbol_layer1;
  uint32_t llr_offset_symbol;
  
  if (first_symbol_flag==1) pdsch_vars[gNB_id]->llr_offset[symbol-1] = 0;
  llr_offset_symbol = pdsch_vars[gNB_id]->llr_offset[symbol-1];
  //pllr_symbol_cw0_deint  = (int8_t*)pdsch_vars[gNB_id]->llr[0];
  //pllr_symbol_cw1_deint  = (int8_t*)pdsch_vars[gNB_id]->llr[1];
  pllr_symbol_layer0 = pdsch_vars[gNB_id]->layer_llr[0];
  pllr_symbol_layer1 = pdsch_vars[gNB_id]->layer_llr[1];
  pllr_symbol_layer0 += llr_offset_symbol;
  pllr_symbol_layer1 += llr_offset_symbol;
  pllr_symbol_cw0 = pdsch_vars[gNB_id]->llr[0];
  pllr_symbol_cw1 = pdsch_vars[gNB_id]->llr[1];
  pllr_symbol_cw0 += llr_offset_symbol;
  pllr_symbol_cw1 += llr_offset_symbol;
    
  pdsch_vars[gNB_id]->llr_offset[symbol] = len*dlsch0_harq->Qm + llr_offset_symbol;
 
  /*LOG_I(PHY,"compute LLRs [symbol %d] NbRB %d Qm %d LLRs-Length %d LLR-Offset %d @LLR Buff %x @LLR Buff(symb) %x\n",
    symbol,
    nb_rb,dlsch0_harq->Qm,
    pdsch_vars[gNB_id]->llr_length[symbol],
    pdsch_vars[gNB_id]->llr_offset[symbol],
    (int16_t*)pdsch_vars[gNB_id]->llr[0],
    pllr_symbol_cw0);*/
             
  /*printf("compute LLRs [symbol %d] NbRB %d Qm %d LLRs-Length %d LLR-Offset %d @LLR Buff %p @LLR Buff(symb) %p\n",
    symbol,
    nb_rb,dlsch0_harq->Qm,
    pdsch_vars[gNB_id]->llr_length[symbol],
    pdsch_vars[gNB_id]->llr_offset[symbol],
    pdsch_vars[gNB_id]->llr[0],
    pllr_symbol_cw0);*/

  switch (dlsch0_harq->Qm) {
  case 2 :
    switch (rx_type) {
      case rx_standard :
        for(int l =0; l<dlsch0_harq->Nl; l++)
          nr_dlsch_qpsk_llr(frame_parms,
                            pdsch_vars[gNB_id]->rxdataF_comp0[l*frame_parms->nb_antennas_rx],
                            pdsch_vars[gNB_id]->layer_llr[l]+llr_offset_symbol,
                            symbol,
                            len,
                            first_symbol_flag,
                            nb_rb,
                            beamforming_mode);
        break;
      case rx_IC_single_stream ://not implemented yet
        /*nr_dlsch_qpsk_qpsk_llr(frame_parms,
                               pdsch_vars[gNB_id]->rxdataF_comp0,
                               rxdataF_comp_ptr,
                               pdsch_vars[gNB_id]->dl_ch_rho2_ext,
                               pdsch_vars[gNB_id]->layer_llr[0],
                               symbol,len,first_symbol_flag,nb_rb,
                               adjust_G2(frame_parms,dlsch0_harq->rb_alloc_even,2,nr_slot_rx,symbol),
                               pdsch_vars[gNB_id]->llr128);*/
        break;
      case rx_IC_dual_stream ://not implemented yet
        /*nr_dlsch_qpsk_qpsk_llr(frame_parms,
                               rxdataF_comp_ptr,
                               pdsch_vars[gNB_id]->rxdataF_comp0,
                               pdsch_vars[gNB_id]->dl_ch_rho_ext[harq_pid][round],
                               pdsch_vars[gNB_id]->layer_llr[1],
                               symbol,len,first_symbol_flag,nb_rb,
                               adjust_G2(frame_parms,dlsch1_harq->rb_alloc_even,2,nr_slot_rx,symbol),
                               pdsch_vars[gNB_id]->llr128_2ndstream);*/
        break;
      case rx_SIC_dual_stream ://not implemented yet
        break;
    }
    break;
  case 4 :
    switch (rx_type) {
      case rx_standard :
        for(int l =0; l<dlsch0_harq->Nl; l++)
          nr_dlsch_16qam_llr(frame_parms,
                             pdsch_vars[gNB_id]->rxdataF_comp0[l*frame_parms->nb_antennas_rx],
                             pdsch_vars[gNB_id]->layer_llr[l]+llr_offset_symbol,
                             pdsch_vars[gNB_id]->dl_ch_mag0[0],
                             symbol,
                             len,
                             first_symbol_flag,
                             nb_rb,
                             beamforming_mode);
        break;
      case rx_IC_single_stream ://not implemented yet
        break;
      case rx_IC_dual_stream ://not implemented yet
        break;
      case rx_SIC_dual_stream ://not implemented yet
        break;
    }
    break;
  case 6 :
    switch (rx_type) {
      case rx_standard :
        for(int l =0; l<dlsch0_harq->Nl; l++)
          nr_dlsch_64qam_llr(frame_parms,
                             pdsch_vars[gNB_id]->rxdataF_comp0[l*frame_parms->nb_antennas_rx],
                             pdsch_vars[gNB_id]->layer_llr[l]+llr_offset_symbol,
                             pdsch_vars[gNB_id]->dl_ch_mag0[0],
                             pdsch_vars[gNB_id]->dl_ch_magb0[0],
                             symbol,
                             len,
                             first_symbol_flag,
                             nb_rb,
                             beamforming_mode);
        break;
      case rx_IC_single_stream ://not implemented yet
        break;
      case rx_IC_dual_stream ://not implemented yet
        break;
      case rx_SIC_dual_stream ://not implemented yet
        break;
    }

    break;
  case 8:
    switch (rx_type) {
      case rx_standard :
        for(int l =0; l<dlsch0_harq->Nl; l++)
          nr_dlsch_256qam_llr(frame_parms,
                              pdsch_vars[gNB_id]->rxdataF_comp0[l*frame_parms->nb_antennas_rx],
                              pdsch_vars[gNB_id]->layer_llr[l]+llr_offset_symbol,
                              pdsch_vars[gNB_id]->dl_ch_mag0[0],
                              pdsch_vars[gNB_id]->dl_ch_magb0[0],
                              pdsch_vars[gNB_id]->dl_ch_magr0[0],
                              symbol,
                              len,
                              first_symbol_flag,
                              nb_rb,
                              beamforming_mode);
        break;
      case rx_IC_single_stream ://not implemented yet
        break;
      case rx_IC_dual_stream ://not implemented yet
        break;
      case rx_SIC_dual_stream ://not implemented yet
        break;
    }
    break;
  default:
    LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
    return(-1);
    break;
  }

  if (dlsch1_harq) {
    switch (nr_get_Qm_dl(dlsch1_harq->mcs,dlsch1_harq->mcs_table)) {
    case 2 :
      if (rx_type==rx_standard) {
        nr_dlsch_qpsk_llr(frame_parms,
                          pdsch_vars[gNB_id]->rxdataF_comp0[0],
                          pdsch_vars[gNB_id]->layer_llr[0]+llr_offset_symbol,
                          symbol,
                          len,
                          first_symbol_flag,
                          nb_rb,
                          beamforming_mode);
      }
      break;
    case 4:
      if (rx_type==rx_standard) {
        nr_dlsch_16qam_llr(frame_parms,
                           pdsch_vars[gNB_id]->rxdataF_comp0[0],
                           pdsch_vars[gNB_id]->layer_llr[0]+llr_offset_symbol,
                           pdsch_vars[gNB_id]->dl_ch_mag0[0],
                           symbol,
                           len,
                           first_symbol_flag,
                           nb_rb,
                           beamforming_mode);
      }
      break;
    case 6 :
      if (rx_type==rx_standard) {
        nr_dlsch_64qam_llr(frame_parms,
                           pdsch_vars[gNB_id]->rxdataF_comp0[0],
                           pdsch_vars[gNB_id]->layer_llr[0]+llr_offset_symbol,
                           pdsch_vars[gNB_id]->dl_ch_mag0[0],
                           pdsch_vars[gNB_id]->dl_ch_magb0[0],
                           symbol,
                           len,
                           first_symbol_flag,
                           nb_rb,
                           beamforming_mode);
        }
        break;
    case 8 :
      if (rx_type==rx_standard) {
        nr_dlsch_256qam_llr(frame_parms,
                            pdsch_vars[gNB_id]->rxdataF_comp0[0],
                            pdsch_vars[gNB_id]->layer_llr[0]+llr_offset_symbol,
                            pdsch_vars[gNB_id]->dl_ch_mag0[0],
                            pdsch_vars[gNB_id]->dl_ch_magb0[0],
                            pdsch_vars[gNB_id]->dl_ch_magr0[0],
                            symbol,
                            len,
                            first_symbol_flag,
                            nb_rb,
                            beamforming_mode);
      }
        break;
      default:
        LOG_W(PHY,"rx_dlsch.c : Unknown mod_order!!!!\n");
        return(-1);
        break;
    }
  }
  return 0;
}
//==============================================================================================


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

  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]
         );

}

void print_shorts(char *s,__m128i *x)
{

  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]);

}

void print_shorts2(char *s,__m64 *x)
{

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

}

void print_ints(char *s,__m128i *x)
{

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

}*/
#endif
