nr_ulsch_demodulation.c 42.5 KB
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#include "PHY/defs_gNB.h"
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#include "PHY/phy_extern.h"
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#include "nr_transport_proto.h"
#include "PHY/impl_defs_top.h"
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#include "PHY/NR_TRANSPORT/nr_sch_dmrs.h"
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#include "PHY/NR_REFSIG/dmrs_nr.h"
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#include "PHY/NR_REFSIG/ptrs_nr.h"
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#include "PHY/NR_ESTIMATION/nr_ul_estimation.h"
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#include "PHY/defs_nr_common.h"
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//#define DEBUG_CH_COMP
//#define DEBUG_RB_EXT
//#define DEBUG_CH_MAG

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void nr_idft(uint32_t *z, uint32_t Msc_PUSCH)
{

#if defined(__x86_64__) || defined(__i386__)
  __m128i idft_in128[1][1200], idft_out128[1][1200];
  __m128i norm128;
#elif defined(__arm__)
  int16x8_t idft_in128[1][1200], idft_out128[1][1200];
  int16x8_t norm128;
#endif
  int16_t *idft_in0 = (int16_t*)idft_in128[0], *idft_out0 = (int16_t*)idft_out128[0];

  int i, ip;

  LOG_T(PHY,"Doing lte_idft for Msc_PUSCH %d\n",Msc_PUSCH);

  // conjugate input
  for (i = 0; i < (Msc_PUSCH>>2); i++) {
#if defined(__x86_64__)||defined(__i386__)
    *&(((__m128i*)z)[i]) = _mm_sign_epi16(*&(((__m128i*)z)[i]), *(__m128i*)&conjugate2[0]);
#elif defined(__arm__)
    *&(((int16x8_t*)z)[i]) = vmulq_s16(*&(((int16x8_t*)z)[i]), *(int16x8_t*)&conjugate2[0]);
#endif
  }

  for (i=0,ip=0; i<Msc_PUSCH; i++, ip+=4) {
    ((uint32_t*)idft_in0)[ip+0] = z[i];
  }


  switch (Msc_PUSCH) {
    case 12:
      dft12((int16_t *)idft_in0, (int16_t *)idft_out0);

#if defined(__x86_64__)||defined(__i386__)
      norm128 = _mm_set1_epi16(9459);
#elif defined(__arm__)
      norm128 = vdupq_n_s16(9459);
#endif

      for (i = 0; i < 12; i++) {
#if defined(__x86_64__)||defined(__i386__)
        ((__m128i*)idft_out0)[i] = _mm_slli_epi16(_mm_mulhi_epi16(((__m128i*)idft_out0)[i], norm128), 1);
#elif defined(__arm__)
        ((int16x8_t*)idft_out0)[i] = vqdmulhq_s16(((int16x8_t*)idft_out0)[i], norm128);
#endif
      }

      break;

    case 24:
      dft24(idft_in0, idft_out0, 1);
      break;

    case 36:
      dft36(idft_in0, idft_out0, 1);
      break;

    case 48:
      dft48(idft_in0, idft_out0, 1);
      break;

    case 60:
      dft60(idft_in0, idft_out0, 1);
      break;

    case 72:
      dft72(idft_in0, idft_out0, 1);
      break;

    case 96:
      dft96(idft_in0, idft_out0, 1);
      break;

    case 108:
      dft108(idft_in0, idft_out0, 1);
      break;

    case 120:
      dft120(idft_in0, idft_out0, 1);
      break;

    case 144:
      dft144(idft_in0, idft_out0, 1);
      break;

    case 180:
      dft180(idft_in0, idft_out0, 1);
      break;

    case 192:
      dft192(idft_in0, idft_out0, 1);
      break;

    case 216:
      dft216(idft_in0, idft_out0, 1);
      break;

    case 240:
      dft240(idft_in0, idft_out0, 1);
      break;

    case 288:
      dft288(idft_in0, idft_out0, 1);
      break;

    case 300:
      dft300(idft_in0, idft_out0, 1);
      break;

    case 324:
      dft324((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 360:
      dft360((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 384:
      dft384((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 432:
      dft432((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 480:
      dft480((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 540:
      dft540((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 576:
      dft576((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 600:
      dft600((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 648:
      dft648((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 720:
      dft720((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 768:
      dft768((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 864:
      dft864((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 900:
      dft900((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 960:
      dft960((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 972:
      dft972((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 1080:
      dft1080((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 1152:
      dft1152((int16_t*)idft_in0, (int16_t*)idft_out0, 1);
      break;

    case 1200:
      dft1200(idft_in0, idft_out0, 1);
      break;

    default:
      // should not be reached
      LOG_E( PHY, "Unsupported Msc_PUSCH value of %"PRIu16"\n", Msc_PUSCH );
      return;
  }



  for (i = 0, ip = 0; i < Msc_PUSCH; i++, ip+=4) {
    z[i] = ((uint32_t*)idft_out0)[ip];
  }

  // conjugate output
  for (i = 0; i < (Msc_PUSCH>>2); i++) {
#if defined(__x86_64__) || defined(__i386__)
    ((__m128i*)z)[i] = _mm_sign_epi16(((__m128i*)z)[i], *(__m128i*)&conjugate2[0]);
#elif defined(__arm__)
    *&(((int16x8_t*)z)[i]) = vmulq_s16(*&(((int16x8_t*)z)[i]), *(int16x8_t*)&conjugate2[0]);
#endif
  }

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

}
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void nr_ulsch_extract_rbs_single(int32_t **rxdataF,
                                 NR_gNB_PUSCH *pusch_vars,
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                                 unsigned char symbol,
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                                 uint8_t is_dmrs_symbol,
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                                 nfapi_nr_pusch_pdu_t *pusch_pdu,
                                 NR_DL_FRAME_PARMS *frame_parms)
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{
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  unsigned short start_re, re, nb_re_pusch;
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  unsigned char aarx;
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  uint8_t K_ptrs;
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  uint32_t rxF_ext_index = 0;
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  uint32_t ul_ch0_ext_index = 0;
  uint32_t ul_ch0_index = 0;
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  uint32_t ul_ch0_ptrs_ext_index = 0;
  uint32_t ul_ch0_ptrs_index = 0;
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  uint8_t is_ptrs_symbol_flag,k_prime;
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  uint16_t n=0, num_ptrs_symbols;
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  int16_t *rxF,*rxF_ext;
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  int *ul_ch0,*ul_ch0_ext;
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  int *ul_ch0_ptrs,*ul_ch0_ptrs_ext;
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  uint16_t n_rnti = pusch_pdu->rnti;
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  uint8_t delta = 0;
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#ifdef DEBUG_RB_EXT

  printf("--------------------symbol = %d-----------------------\n", symbol);
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  printf("--------------------ch_ext_index = %d-----------------------\n", symbol*NR_NB_SC_PER_RB * pusch_pdu->rb_size);
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#endif
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  uint8_t is_dmrs_re;
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  start_re = (frame_parms->first_carrier_offset + (pusch_pdu->rb_start * NR_NB_SC_PER_RB))%frame_parms->ofdm_symbol_size;
  nb_re_pusch = NR_NB_SC_PER_RB * pusch_pdu->rb_size;
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  is_ptrs_symbol_flag = 0;
  num_ptrs_symbols = 0;

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  K_ptrs = (pusch_pdu->pusch_ptrs.ptrs_freq_density)?4:2;
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  for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
    
    rxF       = (int16_t *)&rxdataF[aarx][symbol * frame_parms->ofdm_symbol_size];
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    rxF_ext   = (int16_t *)&pusch_vars->rxdataF_ext[aarx][symbol * nb_re_pusch]; // [hna] rxdataF_ext isn't contiguous in order to solve an alignment problem ib llr computation in case of mod_order = 4, 6

    ul_ch0     = &pusch_vars->ul_ch_estimates[aarx][pusch_vars->dmrs_symbol*frame_parms->ofdm_symbol_size]; // update channel estimates if new dmrs symbol are available
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    ul_ch0_ext = &pusch_vars->ul_ch_estimates_ext[aarx][symbol*nb_re_pusch];
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    ul_ch0_ptrs     = &pusch_vars->ul_ch_ptrs_estimates[aarx][pusch_vars->ptrs_symbol_index*frame_parms->ofdm_symbol_size]; // update channel estimates if new dmrs symbol are available

    ul_ch0_ptrs_ext = &pusch_vars->ul_ch_ptrs_estimates_ext[aarx][symbol*nb_re_pusch];
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    n = 0;
    k_prime = 0;

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    for (re = 0; re < nb_re_pusch; re++) {
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      if (is_dmrs_symbol)
        is_dmrs_re = (re == get_dmrs_freq_idx_ul(n, k_prime, delta, pusch_pdu->dmrs_config_type));
      else
        is_dmrs_re = 0;
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      if ( ((pusch_pdu->pdu_bit_map)>>2)& 0x01 ) {
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        is_ptrs_symbol_flag = is_ptrs_symbol(symbol,
                                             (start_re + re)%frame_parms->ofdm_symbol_size,
                                             n_rnti,
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                                             pusch_pdu->rb_size,
                                             pusch_pdu->nr_of_symbols,
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                                             aarx,
                                             K_ptrs,
                                             pusch_vars->ptrs_symbols,
                                             start_re,
                                             frame_parms->ofdm_symbol_size,
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                                             pusch_pdu->dmrs_config_type,
                                             pusch_pdu->pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset);
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        if (is_ptrs_symbol_flag == 1)
          num_ptrs_symbols++;

      }

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  #ifdef DEBUG_RB_EXT
      printf("re = %d, is_dmrs_symbol_flag = %d, symbol = %d\n", re, is_dmrs_symbol_flag, symbol);
  #endif

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      if ( is_dmrs_re == 0 && is_ptrs_symbol_flag == 0) {
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        rxF_ext[rxF_ext_index]     = (rxF[ ((start_re + re)*2)      % (frame_parms->ofdm_symbol_size*2)]);
        rxF_ext[rxF_ext_index + 1] = (rxF[(((start_re + re)*2) + 1) % (frame_parms->ofdm_symbol_size*2)]);
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        ul_ch0_ext[ul_ch0_ext_index] = ul_ch0[ul_ch0_index];
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        ul_ch0_ptrs_ext[ul_ch0_ptrs_ext_index] = ul_ch0_ptrs[ul_ch0_ptrs_index];
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  #ifdef DEBUG_RB_EXT
        printf("rxF_ext[%d] = %d\n", rxF_ext_index, rxF_ext[rxF_ext_index]);
        printf("rxF_ext[%d] = %d\n", rxF_ext_index+1, rxF_ext[rxF_ext_index+1]);
  #endif

        ul_ch0_ext_index++;
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        ul_ch0_ptrs_ext_index++;
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        rxF_ext_index +=2;
      } else {
        k_prime++;
        k_prime&=1;
        n+=(k_prime)?0:1;
      }
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      ul_ch0_index++;
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      ul_ch0_ptrs_index++;
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    }
  }
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  pusch_vars->ptrs_sc_per_ofdm_symbol = num_ptrs_symbols;

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}

void nr_ulsch_scale_channel(int **ul_ch_estimates_ext,
                            NR_DL_FRAME_PARMS *frame_parms,
                            NR_gNB_ULSCH_t **ulsch_gNB,
                            uint8_t symbol,
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                            uint8_t is_dmrs_symbol,
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                            unsigned short nb_rb,
                            pusch_dmrs_type_t pusch_dmrs_type)
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{

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

  short rb, ch_amp;
  unsigned char aatx,aarx;
  __m128i *ul_ch128, ch_amp128;

  // Determine scaling amplitude based the symbol

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

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

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

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

      ul_ch128 = (__m128i *)&ul_ch_estimates_ext[aarx][symbol*nb_rb*NR_NB_SC_PER_RB];

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      if (is_dmrs_symbol==1){
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        if (pusch_dmrs_type == pusch_dmrs_type1)
          nb_rb = nb_rb>>1;
        else
          nb_rb = (2*nb_rb)/3;
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      }


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

        ul_ch128[0] = _mm_mulhi_epi16(ul_ch128[0], ch_amp128);
        ul_ch128[0] = _mm_slli_epi16(ul_ch128[0], 3);

        ul_ch128[1] = _mm_mulhi_epi16(ul_ch128[1], ch_amp128);
        ul_ch128[1] = _mm_slli_epi16(ul_ch128[1], 3);

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        if (is_dmrs_symbol) {
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          ul_ch128+=2;
        } else {
          ul_ch128[2] = _mm_mulhi_epi16(ul_ch128[2], ch_amp128);
          ul_ch128[2] = _mm_slli_epi16(ul_ch128[2], 3);
          ul_ch128+=3;

        }
      }
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    }
  }
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#endif
}

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

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

  short rb;
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  unsigned char aatx, aarx;
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  __m128i *ul_ch128, avg128U;

  int16_t x = factor2(len);
  int16_t y = (len)>>x;

  for (aatx = 0; aatx < frame_parms->nb_antennas_tx; aatx++)
    for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
      //clear average level
      avg128U = _mm_setzero_si128();

      ul_ch128=(__m128i *)&ul_ch_estimates_ext[(aatx<<1)+aarx][symbol*nb_rb*12];

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      for (rb = 0; rb < len/12; rb++) {
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        avg128U = _mm_add_epi32(avg128U, _mm_srai_epi32(_mm_madd_epi16(ul_ch128[0], ul_ch128[0]), x));
        avg128U = _mm_add_epi32(avg128U, _mm_srai_epi32(_mm_madd_epi16(ul_ch128[1], ul_ch128[1]), x));
        avg128U = _mm_add_epi32(avg128U, _mm_srai_epi32(_mm_madd_epi16(ul_ch128[2], ul_ch128[2]), x));
        ul_ch128+=3;
      }

      avg[(aatx<<1)+aarx] = (((int32_t*)&avg128U)[0] +
                             ((int32_t*)&avg128U)[1] +
                             ((int32_t*)&avg128U)[2] +
                             ((int32_t*)&avg128U)[3]   ) / y;

    }

  _mm_empty();
  _m_empty();

#elif defined(__arm__)

  short rb;
  unsigned char aatx, aarx, nre = 12, symbol_mod;
  int32x4_t avg128U;
  int16x4_t *ul_ch128;

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

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  for (aatx=0; aatx<frame_parms->nb_antenna_ports_gNB; aatx++)
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    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      //clear average level
      avg128U = vdupq_n_s32(0);
      // 5 is always a symbol with no pilots for both normal and extended prefix

      ul_ch128 = (int16x4_t *)&ul_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_UL*12];

      for (rb = 0; rb < nb_rb; rb++) {
        //  printf("rb %d : ",rb);
        //  print_shorts("ch",&ul_ch128[0]);
        avg128U = vqaddq_s32(avg128U, vmull_s16(ul_ch128[0], ul_ch128[0]));
        avg128U = vqaddq_s32(avg128U, vmull_s16(ul_ch128[1], ul_ch128[1]));
        avg128U = vqaddq_s32(avg128U, vmull_s16(ul_ch128[2], ul_ch128[2]));
        avg128U = vqaddq_s32(avg128U, vmull_s16(ul_ch128[3], ul_ch128[3]));

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        if (((symbol_mod == 0) || (symbol_mod == (frame_parms->Ncp-1)))&&(frame_parms->nb_antenna_ports_gNB!=1)) {
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          ul_ch128+=4;
        } else {
          avg128U = vqaddq_s32(avg128U, vmull_s16(ul_ch128[4], ul_ch128[4]));
          avg128U = vqaddq_s32(avg128U, vmull_s16(ul_ch128[5], ul_ch128[5]));
          ul_ch128+=6;
        }

        /*
          if (rb==0) {
          print_shorts("ul_ch128",&ul_ch128[0]);
          print_shorts("ul_ch128",&ul_ch128[1]);
          print_shorts("ul_ch128",&ul_ch128[2]);
          }
        */
      }

      if (symbol==2) //assume start symbol 2
          nre=6;
      else
          nre=12;

      avg[(aatx<<1)+aarx] = (((int32_t*)&avg128U)[0] +
                             ((int32_t*)&avg128U)[1] +
                             ((int32_t*)&avg128U)[2] +
                             ((int32_t*)&avg128U)[3]   ) / (nb_rb*nre);
    }


#endif
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}

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void nr_ulsch_channel_compensation(int **rxdataF_ext,
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                                   int **ul_ch_estimates_ext,
                                   int **ul_ch_mag,
                                   int **ul_ch_magb,
                                   int **rxdataF_comp,
                                   int **rho,
                                   NR_DL_FRAME_PARMS *frame_parms,
                                   unsigned char symbol,
                                   uint8_t is_dmrs_symbol,
                                   unsigned char mod_order,
                                   unsigned short nb_rb,
                                   unsigned char output_shift) {
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#ifdef DEBUG_CH_COMP
  int16_t *rxF, *ul_ch;
  int prnt_idx;

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  rxF   = (int16_t *)&rxdataF_ext[0][(symbol*nb_rb*12)];
  ul_ch = (int16_t *)&ul_ch_estimates_ext[0][symbol*nb_rb*12];

  printf("--------------------symbol = %d, mod_order = %d, output_shift = %d-----------------------\n", symbol, mod_order, output_shift);
  printf("----------------Before compansation------------------\n");

  for (prnt_idx=0;prnt_idx<12*nb_rb*2;prnt_idx++){

    printf("rxF[%d] = %d\n", prnt_idx, rxF[prnt_idx]);
    printf("ul_ch[%d] = %d\n", prnt_idx, ul_ch[prnt_idx]);

  }

#endif

#ifdef DEBUG_CH_MAG
  int16_t *ch_mag;
  int print_idx;


  ch_mag   = (int16_t *)&ul_ch_mag[0][(symbol*nb_rb*12)];

  printf("--------------------symbol = %d, mod_order = %d-----------------------\n", symbol, mod_order);
  printf("----------------Before computation------------------\n");

  for (print_idx=0;print_idx<50;print_idx++){

    printf("ch_mag[%d] = %d\n", print_idx, ch_mag[print_idx]);

  }

#endif

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

  unsigned short rb;
  unsigned char aatx,aarx;
  __m128i *ul_ch128,*ul_ch128_2,*ul_ch_mag128,*ul_ch_mag128b,*rxdataF128,*rxdataF_comp128,*rho128;
  __m128i mmtmpD0,mmtmpD1,mmtmpD2,mmtmpD3,QAM_amp128,QAM_amp128b;
  QAM_amp128b = _mm_setzero_si128();

  for (aatx=0; aatx<frame_parms->nb_antennas_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);
    }

    //    printf("comp: rxdataF_comp %p, symbol %d\n",rxdataF_comp[0],symbol);

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

      ul_ch128          = (__m128i *)&ul_ch_estimates_ext[(aatx<<1)+aarx][symbol*nb_rb*12];
      ul_ch_mag128      = (__m128i *)&ul_ch_mag[(aatx<<1)+aarx][symbol*nb_rb*12];
      ul_ch_mag128b     = (__m128i *)&ul_ch_magb[(aatx<<1)+aarx][symbol*nb_rb*12];
      rxdataF128        = (__m128i *)&rxdataF_ext[aarx][symbol*nb_rb*12];
      rxdataF_comp128   = (__m128i *)&rxdataF_comp[(aatx<<1)+aarx][symbol*nb_rb*12];


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

          //print_shorts("ch:",(int16_t*)&ul_ch128[0]);

          mmtmpD0 = _mm_madd_epi16(ul_ch128[0],ul_ch128[0]);
          mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);

          mmtmpD1 = _mm_madd_epi16(ul_ch128[1],ul_ch128[1]);
          mmtmpD1 = _mm_srai_epi32(mmtmpD1,output_shift);

          mmtmpD0 = _mm_packs_epi32(mmtmpD0,mmtmpD1);

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

          ul_ch_mag128[0] = _mm_unpacklo_epi16(mmtmpD0,mmtmpD0);
          ul_ch_mag128b[0] = ul_ch_mag128[0];
          ul_ch_mag128[0] = _mm_mulhi_epi16(ul_ch_mag128[0],QAM_amp128);
          ul_ch_mag128[0] = _mm_slli_epi16(ul_ch_mag128[0],1);

          // print_ints("ch: = ",(int32_t*)&mmtmpD0);
          // print_shorts("QAM_amp:",(int16_t*)&QAM_amp128);
          // print_shorts("mag:",(int16_t*)&ul_ch_mag128[0]);

          ul_ch_mag128[1] = _mm_unpackhi_epi16(mmtmpD0,mmtmpD0);
          ul_ch_mag128b[1] = ul_ch_mag128[1];
          ul_ch_mag128[1] = _mm_mulhi_epi16(ul_ch_mag128[1],QAM_amp128);
          ul_ch_mag128[1] = _mm_slli_epi16(ul_ch_mag128[1],1);

607
          if (is_dmrs_symbol==0) {
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
            mmtmpD0 = _mm_madd_epi16(ul_ch128[2],ul_ch128[2]);
            mmtmpD0 = _mm_srai_epi32(mmtmpD0,output_shift);
            mmtmpD1 = _mm_packs_epi32(mmtmpD0,mmtmpD0);

            ul_ch_mag128[2] = _mm_unpacklo_epi16(mmtmpD1,mmtmpD1);
            ul_ch_mag128b[2] = ul_ch_mag128[2];

            ul_ch_mag128[2] = _mm_mulhi_epi16(ul_ch_mag128[2],QAM_amp128);
            ul_ch_mag128[2] = _mm_slli_epi16(ul_ch_mag128[2],1);
          }

          ul_ch_mag128b[0] = _mm_mulhi_epi16(ul_ch_mag128b[0],QAM_amp128b);
          ul_ch_mag128b[0] = _mm_slli_epi16(ul_ch_mag128b[0],1);


          ul_ch_mag128b[1] = _mm_mulhi_epi16(ul_ch_mag128b[1],QAM_amp128b);
          ul_ch_mag128b[1] = _mm_slli_epi16(ul_ch_mag128b[1],1);

626
          if (is_dmrs_symbol==0) {
627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
            ul_ch_mag128b[2] = _mm_mulhi_epi16(ul_ch_mag128b[2],QAM_amp128b);
            ul_ch_mag128b[2] = _mm_slli_epi16(ul_ch_mag128b[2],1);
          }
        }

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(ul_ch128[0],rxdataF128[0]);
        //  print_ints("re",&mmtmpD0);

        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(ul_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:",ul_ch128);
        //  print_shorts("pack:",rxdataF_comp128);

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(ul_ch128[1],rxdataF128[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(ul_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:",ul_ch128+1);
        //  print_shorts("pack:",rxdataF_comp128+1);

674
        if (is_dmrs_symbol==0) {
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
          // multiply by conjugated channel
          mmtmpD0 = _mm_madd_epi16(ul_ch128[2],rxdataF128[2]);
          // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
          mmtmpD1 = _mm_shufflelo_epi16(ul_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:",rxdataF128+2);
          //  print_shorts("ch:",ul_ch128+2);
          //        print_shorts("pack:",rxdataF_comp128+2);

          ul_ch128+=3;
          ul_ch_mag128+=3;
          ul_ch_mag128b+=3;
          rxdataF128+=3;
          rxdataF_comp128+=3;
        } else { // we have a smaller PUSCH in symbols with pilots so skip last group of 4 REs and increment less
          ul_ch128+=2;
          ul_ch_mag128+=2;
          ul_ch_mag128b+=2;
          rxdataF128+=2;
          rxdataF_comp128+=2;
        }

      }
    }
  }

  if (rho) {


    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      rho128        = (__m128i *)&rho[aarx][symbol*frame_parms->N_RB_UL*12];
      ul_ch128      = (__m128i *)&ul_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_UL*12];
      ul_ch128_2    = (__m128i *)&ul_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_UL*12];

      for (rb=0; rb<nb_rb; rb++) {
        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(ul_ch128[0],ul_ch128_2[0]);
        //  print_ints("re",&mmtmpD0);

        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(ul_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,ul_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:",ul_ch128_2);
        //print_shorts("ch:",ul_ch128);
        //print_shorts("pack:",rho128);

        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(ul_ch128[1],ul_ch128_2[1]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(ul_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,ul_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:",ul_ch128_2+1);
        //print_shorts("ch:",ul_ch128+1);
        //print_shorts("pack:",rho128+1);
        // multiply by conjugated channel
        mmtmpD0 = _mm_madd_epi16(ul_ch128[2],ul_ch128_2[2]);
        // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
        mmtmpD1 = _mm_shufflelo_epi16(ul_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,ul_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:",ul_ch128_2+2);
        //print_shorts("ch:",ul_ch128+2);
        //print_shorts("pack:",rho128+2);

        ul_ch128+=3;
        ul_ch128_2+=3;
        rho128+=3;

      }

    }
  }

  _mm_empty();
  _m_empty();

#elif defined(__arm__)


  unsigned short rb;
796
  unsigned char aatx,aarx,symbol_mod,is_dmrs_symbol=0;
797 798 799 800 801 802 803 804 805 806 807 808 809

  int16x4_t *ul_ch128,*ul_ch128_2,*rxdataF128;
  int32x4_t mmtmpD0,mmtmpD1,mmtmpD0b,mmtmpD1b;
  int16x8_t *ul_ch_mag128,*ul_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;

  if ((symbol_mod == 0) || (symbol_mod == (4-frame_parms->Ncp))) {
810
    if (frame_parms->nb_antenna_ports_gNB==1) { // 10 out of 12 so don't reduce size
811 812 813
      nb_rb=1+(5*nb_rb/6);
    }
    else {
814
      is_dmrs_symbol=1;
815 816 817
    }
  }

818
  for (aatx=0; aatx<frame_parms->nb_antenna_ports_gNB; aatx++) {
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
    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++) {
      ul_ch128          = (int16x4_t*)&ul_ch_estimates_ext[(aatx<<1)+aarx][symbol*frame_parms->N_RB_UL*12];
      ul_ch_mag128      = (int16x8_t*)&ul_ch_mag[(aatx<<1)+aarx][symbol*frame_parms->N_RB_UL*12];
      ul_ch_mag128b     = (int16x8_t*)&ul_ch_magb[(aatx<<1)+aarx][symbol*frame_parms->N_RB_UL*12];
      rxdataF128        = (int16x4_t*)&rxdataF_ext[aarx][symbol*frame_parms->N_RB_UL*12];
      rxdataF_comp128   = (int16x4x2_t*)&rxdataF_comp[(aatx<<1)+aarx][symbol*frame_parms->N_RB_UL*12];

      for (rb=0; rb<nb_rb; rb++) {
  if (mod_order>2) {
    // get channel amplitude if not QPSK
    mmtmpD0 = vmull_s16(ul_ch128[0], ul_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(ul_ch128[1], ul_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(ul_ch128[2], ul_ch128[2]);
    mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
    mmtmpD1 = vmull_s16(ul_ch128[3], ul_ch128[3]);
    mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
    mmtmpD3 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
851
    if (is_dmrs_symbol==0) {
852 853 854 855 856 857 858 859 860 861 862 863
      mmtmpD0 = vmull_s16(ul_ch128[4], ul_ch128[4]);
      mmtmpD0 = vqshlq_s32(vqaddq_s32(mmtmpD0,vrev64q_s32(mmtmpD0)),output_shift128);
      mmtmpD1 = vmull_s16(ul_ch128[5], ul_ch128[5]);
      mmtmpD1 = vqshlq_s32(vqaddq_s32(mmtmpD1,vrev64q_s32(mmtmpD1)),output_shift128);
      mmtmpD4 = vcombine_s16(vmovn_s32(mmtmpD0),vmovn_s32(mmtmpD1));
    }

    ul_ch_mag128b[0] = vqdmulhq_s16(mmtmpD2,QAM_amp128b);
    ul_ch_mag128b[1] = vqdmulhq_s16(mmtmpD3,QAM_amp128b);
    ul_ch_mag128[0] = vqdmulhq_s16(mmtmpD2,QAM_amp128);
    ul_ch_mag128[1] = vqdmulhq_s16(mmtmpD3,QAM_amp128);

864
    if (is_dmrs_symbol==0) {
865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900
      ul_ch_mag128b[2] = vqdmulhq_s16(mmtmpD4,QAM_amp128b);
      ul_ch_mag128[2]  = vqdmulhq_s16(mmtmpD4,QAM_amp128);
    }
  }

  mmtmpD0 = vmull_s16(ul_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(ul_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(ul_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(ul_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(ul_ch128[2], rxdataF128[2]);
  mmtmpD1 = vmull_s16(ul_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(ul_ch128[2],*(int16x4_t*)conj)), rxdataF128[2]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(ul_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));

901
  if (is_dmrs_symbol==0) {
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019
    mmtmpD0 = vmull_s16(ul_ch128[4], rxdataF128[4]);
    mmtmpD1 = vmull_s16(ul_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(ul_ch128[4],*(int16x4_t*)conj)), rxdataF128[4]);
    mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(ul_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));


    ul_ch128+=6;
    ul_ch_mag128+=3;
    ul_ch_mag128b+=3;
    rxdataF128+=6;
    rxdataF_comp128+=3;

  } else { // we have a smaller PUSCH in symbols with pilots so skip last group of 4 REs and increment less
    ul_ch128+=4;
    ul_ch_mag128+=2;
    ul_ch_mag128b+=2;
    rxdataF128+=4;
    rxdataF_comp128+=2;
  }
      }
    }
  }

  if (rho) {
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
      rho128        = (int16x4x2_t*)&rho[aarx][symbol*frame_parms->N_RB_UL*12];
      ul_ch128      = (int16x4_t*)&ul_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_UL*12];
      ul_ch128_2    = (int16x4_t*)&ul_ch_estimates_ext[2+aarx][symbol*frame_parms->N_RB_UL*12];
      for (rb=0; rb<nb_rb; rb++) {
  mmtmpD0 = vmull_s16(ul_ch128[0], ul_ch128_2[0]);
  mmtmpD1 = vmull_s16(ul_ch128[1], ul_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(ul_ch128[0],*(int16x4_t*)conj)), ul_ch128_2[0]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(ul_ch128[1],*(int16x4_t*)conj)), ul_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(ul_ch128[2], ul_ch128_2[2]);
  mmtmpD1 = vmull_s16(ul_ch128[3], ul_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(ul_ch128[2],*(int16x4_t*)conj)), ul_ch128_2[2]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(ul_ch128[3],*(int16x4_t*)conj)), ul_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(ul_ch128[0], ul_ch128_2[0]);
  mmtmpD1 = vmull_s16(ul_ch128[1], ul_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(ul_ch128[4],*(int16x4_t*)conj)), ul_ch128_2[4]);
  mmtmpD1b = vmull_s16(vrev32_s16(vmul_s16(ul_ch128[5],*(int16x4_t*)conj)), ul_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));


  ul_ch128+=6;
  ul_ch128_2+=6;
  rho128+=3;
      }
    }
  }
#endif


#ifdef DEBUG_CH_COMP

  rxF   = (int16_t *)&rxdataF_comp[0][(symbol*nb_rb*12)];

  printf("----------------After compansation------------------\n");

  for (prnt_idx=0;prnt_idx<12*nb_rb*2;prnt_idx++){

    printf("rxF[%d] = %d\n", prnt_idx, rxF[prnt_idx]);

  }

#endif

#ifdef DEBUG_CH_MAG


  ch_mag   = (int16_t *)&ul_ch_mag[0][(symbol*nb_rb*12)];

  printf("----------------After computation------------------\n");

  for (print_idx=0;print_idx<12*nb_rb*2;print_idx++){

    printf("ch_mag[%d] = %d\n", print_idx, ch_mag[print_idx]);

  }

#endif

}
1020 1021 1022 1023 1024 1025 1026 1027

void nr_rx_pusch(PHY_VARS_gNB *gNB,
                 uint8_t UE_id,
                 uint32_t frame,
                 uint8_t nr_tti_rx,
                 unsigned char symbol,
                 unsigned char harq_pid)
{
1028

1029
  uint8_t first_symbol_flag, aarx, aatx, dmrs_symbol_flag, ptrs_symbol_flag; // dmrs_symbol_flag, a flag to indicate DMRS REs in current symbol
1030
  uint32_t nb_re_pusch, bwp_start_subcarrier;
1031
  uint8_t L_ptrs = 0; // PTRS parameter
1032 1033
  int avgs;
  int avg[4];
1034
  NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
1035
  nfapi_nr_pusch_pdu_t *rel15_ul = &gNB->ulsch[UE_id][0]->harq_processes[harq_pid]->ulsch_pdu;
1036

1037
  dmrs_symbol_flag = 0;
1038
  ptrs_symbol_flag = 0;
1039
  first_symbol_flag = 0;
1040
  gNB->pusch_vars[UE_id]->ptrs_sc_per_ofdm_symbol = 0;
1041

1042 1043 1044 1045 1046 1047
  if(symbol == rel15_ul->start_symbol_index){
    gNB->pusch_vars[UE_id]->rxdataF_ext_offset = 0;
    gNB->pusch_vars[UE_id]->dmrs_symbol = 0;
    gNB->pusch_vars[UE_id]->cl_done = 0;
    gNB->pusch_vars[UE_id]->ptrs_symbols = 0;
    first_symbol_flag = 1;
1048

1049 1050
    if ( ((rel15_ul->pdu_bit_map)>>2)& 0x01 ) {  // if there is ptrs pdu
      L_ptrs = 1<<(rel15_ul->pusch_ptrs.ptrs_time_density);
1051 1052

      set_ptrs_symb_idx(&gNB->pusch_vars[UE_id]->ptrs_symbols,
1053 1054 1055
                        rel15_ul->nr_of_symbols,
                        rel15_ul->start_symbol_index,
                        rel15_ul->dmrs_config_type,
1056
                        L_ptrs,
1057
                        1, // only dmrs of length 1 is currently supported
1058
                        frame_parms->ofdm_symbol_size);
1059
    }
1060
  }
1061

1062 1063
  bwp_start_subcarrier = (rel15_ul->rb_start*NR_NB_SC_PER_RB + frame_parms->first_carrier_offset) % frame_parms->ofdm_symbol_size;

1064
  dmrs_symbol_flag = ((rel15_ul->ul_dmrs_symb_pos)>>symbol)&0x01;
1065 1066 1067 1068 1069 1070 1071

  if (dmrs_symbol_flag == 1){
    nb_re_pusch = rel15_ul->rb_size * ((rel15_ul->dmrs_config_type==pusch_dmrs_type1)?6:8);
    gNB->pusch_vars[UE_id]->dmrs_symbol = symbol;
  } else {
    nb_re_pusch = rel15_ul->rb_size * NR_NB_SC_PER_RB;
  }
1072

1073 1074
  if ( ((rel15_ul->pdu_bit_map)>>2)& 0x01 ) {  // if there is ptrs pdu
    ptrs_symbol_flag = is_ptrs_symbol(symbol,
1075
                                      0,
1076 1077 1078
                                      rel15_ul->rnti,
                                      rel15_ul->rb_size,
                                      rel15_ul->nr_of_symbols,
1079
                                      0,
1080 1081
                                      (rel15_ul->pusch_ptrs.ptrs_freq_density)?4:2,
                                      gNB->pusch_vars[UE_id]->ptrs_symbols,
1082
                                      0,
1083 1084 1085 1086
                                      frame_parms->ofdm_symbol_size,
                                      rel15_ul->dmrs_config_type,
                                      rel15_ul->pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset);
  }
1087

1088 1089 1090
  if (ptrs_symbol_flag == 1){
    gNB->pusch_vars[UE_id]->ptrs_symbol_index = symbol;
  }
1091

1092

1093 1094 1095
  //----------------------------------------------------------
  //--------------------- Channel estimation ---------------------
  //----------------------------------------------------------
1096

1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111
  if (dmrs_symbol_flag == 1)
    nr_pusch_channel_estimation(gNB,
                                nr_tti_rx,
                                0, // p
                                symbol,
                                bwp_start_subcarrier,
                                rel15_ul);

  //----------------------------------------------------------
  //--------------------- RBs extraction ---------------------
  //----------------------------------------------------------

  nr_ulsch_extract_rbs_single(gNB->common_vars.rxdataF,
                              gNB->pusch_vars[UE_id],
                              symbol,
1112
                              dmrs_symbol_flag,
1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
                              rel15_ul,
                              frame_parms);

  nr_ulsch_scale_channel(gNB->pusch_vars[UE_id]->ul_ch_estimates_ext,
                         frame_parms,
                         gNB->ulsch[UE_id],
                         symbol,
                         dmrs_symbol_flag,
                         rel15_ul->rb_size,
                         rel15_ul->dmrs_config_type);
1123 1124


1125
  if (first_symbol_flag==1) {
1126

1127
    nr_ulsch_channel_level(gNB->pusch_vars[UE_id]->ul_ch_estimates_ext,
1128
                           frame_parms,
1129
                           avg,
1130
                           symbol,
1131 1132 1133
                           nb_re_pusch,
                           rel15_ul->rb_size);
     avgs = 0;
1134

1135 1136 1137
     for (aatx=0;aatx<frame_parms->nb_antennas_tx;aatx++)
       for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++)
         avgs = cmax(avgs,avg[(aatx<<1)+aarx]);
1138

1139
     gNB->pusch_vars[UE_id]->log2_maxh = (log2_approx(avgs)/2)+1;
1140

1141
  }
1142

1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
  nr_ulsch_channel_compensation(gNB->pusch_vars[UE_id]->rxdataF_ext,
                                gNB->pusch_vars[UE_id]->ul_ch_estimates_ext,
                                gNB->pusch_vars[UE_id]->ul_ch_mag0,
                                gNB->pusch_vars[UE_id]->ul_ch_magb0,
                                gNB->pusch_vars[UE_id]->rxdataF_comp,
                                (frame_parms->nb_antennas_tx>1) ? gNB->pusch_vars[UE_id]->rho : NULL,
                                frame_parms,
                                symbol,
                                dmrs_symbol_flag,
                                rel15_ul->qam_mod_order,
                                rel15_ul->rb_size,
                                gNB->pusch_vars[UE_id]->log2_maxh);
1155

1156 1157 1158
#ifdef NR_SC_FDMA
  nr_idft(&((uint32_t*)gNB->pusch_vars[UE_id]->rxdataF_ext[0])[symbol * rel15_ul->rb_size * NR_NB_SC_PER_RB], nb_re_pusch);
#endif
1159

1160 1161 1162
  //----------------------------------------------------------
  //-------------------- LLRs computation --------------------
  //----------------------------------------------------------
1163

1164 1165 1166 1167 1168 1169 1170 1171
  nr_ulsch_compute_llr(&gNB->pusch_vars[UE_id]->rxdataF_comp[0][symbol * rel15_ul->rb_size * NR_NB_SC_PER_RB],
                       gNB->pusch_vars[UE_id]->ul_ch_mag0,
                       gNB->pusch_vars[UE_id]->ul_ch_magb0,
                       &gNB->pusch_vars[UE_id]->llr[gNB->pusch_vars[UE_id]->rxdataF_ext_offset * rel15_ul->qam_mod_order],
                       rel15_ul->rb_size,
                       nb_re_pusch,
                       symbol,
                       rel15_ul->qam_mod_order);
1172

1173
  gNB->pusch_vars[UE_id]->rxdataF_ext_offset = gNB->pusch_vars[UE_id]->rxdataF_ext_offset +  nb_re_pusch - gNB->pusch_vars[UE_id]->ptrs_sc_per_ofdm_symbol;
1174
  
1175
}