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/*******************************************************************************
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    OpenAirInterface
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    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with OpenAirInterface.The full GNU General Public License is
   included in this distribution in the file called "COPYING". If not,
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   see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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 *******************************************************************************/
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/*! \file PHY/LTE_TRANSPORT/dci.c
* \brief Implements PDCCH physical channel TX/RX procedures (36.211) and DCI encoding/decoding (36.212/36.213). Current LTE compliance V8.6 2009-03.
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#ifdef USER_MODE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#endif
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
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#include "SIMULATION/TOOLS/defs.h" // for taus 
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#include "PHY/sse_intrin.h"
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#include "assertions.h"
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//#define DEBUG_DCI_ENCODING 1
//#define DEBUG_DCI_DECODING 1
//#define DEBUG_PHY
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//#undef ALL_AGGREGATION

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//extern uint16_t phich_reg[MAX_NUM_PHICH_GROUPS][3];
//extern uint16_t pcfich_reg[4];
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uint32_t check_phich_reg(LTE_DL_FRAME_PARMS *frame_parms,uint32_t kprime,uint8_t lprime,uint8_t mi)
{
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  uint16_t i;
  uint16_t Ngroup_PHICH = (frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)/48;
  uint16_t mprime;
  uint16_t *pcfich_reg = frame_parms->pcfich_reg;
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  if ((lprime>0) && (frame_parms->Ncp==0) )
    return(0);

  //  printf("check_phich_reg : mi %d\n",mi);

  // compute REG based on symbol
  if ((lprime == 0)||
      ((lprime==1)&&(frame_parms->nb_antennas_tx_eNB == 4)))
    mprime = kprime/6;
  else
    mprime = kprime>>2;

  // check if PCFICH uses mprime
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  if ((lprime==0) &&
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      ((mprime == pcfich_reg[0]) ||
       (mprime == pcfich_reg[1]) ||
       (mprime == pcfich_reg[2]) ||
       (mprime == pcfich_reg[3]))) {
#ifdef DEBUG_DCI_ENCODING
    msg("[PHY] REG %d allocated to PCFICH\n",mprime);
#endif
    return(1);
  }

  // handle Special subframe case for TDD !!!

  //  printf("Checking phich_reg %d\n",mprime);
  if (mi > 0) {
    if (((frame_parms->phich_config_common.phich_resource*frame_parms->N_RB_DL)%48) > 0)
      Ngroup_PHICH++;
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    if (frame_parms->Ncp == 1) {
      Ngroup_PHICH<<=1;
    }
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    for (i=0; i<Ngroup_PHICH; i++) {
      if ((mprime == frame_parms->phich_reg[i][0]) ||
          (mprime == frame_parms->phich_reg[i][1]) ||
          (mprime == frame_parms->phich_reg[i][2]))  {
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#ifdef DEBUG_DCI_ENCODING
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        msg("[PHY] REG %d (lprime %d) allocated to PHICH\n",mprime,lprime);
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#endif
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        return(1);
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      }
    }
  }
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  return(0);
}

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uint16_t extract_crc(uint8_t *dci,uint8_t dci_len)
{
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  uint16_t crc16;
  //  uint8_t i;
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  /*
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  uint8_t crc;
  crc = ((uint16_t *)dci)[DCI_LENGTH>>4];
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  printf("crc1: %x, shift %d (DCI_LENGTH %d)\n",crc,DCI_LENGTH&0xf,DCI_LENGTH);
  crc = (crc>>(DCI_LENGTH&0xf));
  // clear crc bits
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  ((uint16_t *)dci)[DCI_LENGTH>>4] &= (0xffff>>(16-(DCI_LENGTH&0xf)));
  printf("crc2: %x, dci0 %x\n",crc,((int16_t *)dci)[DCI_LENGTH>>4]);
  crc |= (((uint16_t *)dci)[1+(DCI_LENGTH>>4)])<<(16-(DCI_LENGTH&0xf));
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  // clear crc bits
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  (((uint16_t *)dci)[1+(DCI_LENGTH>>4)]) = 0;
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  printf("extract_crc: crc %x\n",crc);
  */
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#ifdef DEBUG_DCI_DECODING
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  msg("dci_crc (%x,%x,%x), dci_len&0x7=%d\n",dci[dci_len>>3],dci[1+(dci_len>>3)],dci[2+(dci_len>>3)],
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      dci_len&0x7);
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#endif
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  if ((dci_len&0x7) > 0) {
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    ((uint8_t *)&crc16)[0] = dci[1+(dci_len>>3)]<<(dci_len&0x7) | dci[2+(dci_len>>3)]>>(8-(dci_len&0x7));
    ((uint8_t *)&crc16)[1] = dci[(dci_len>>3)]<<(dci_len&0x7) | dci[1+(dci_len>>3)]>>(8-(dci_len&0x7));
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  } else {
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    ((uint8_t *)&crc16)[0] = dci[1+(dci_len>>3)];
    ((uint8_t *)&crc16)[1] = dci[(dci_len>>3)];
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  }

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#ifdef DEBUG_DCI_DECODING
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  msg("dci_crc =>%x\n",crc16);
#endif

  //  dci[(dci_len>>3)]&=(0xffff<<(dci_len&0xf));
  //  dci[(dci_len>>3)+1] = 0;
  //  dci[(dci_len>>3)+2] = 0;
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  return((uint16_t)crc16);
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}



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static uint8_t d[3*(MAX_DCI_SIZE_BITS + 16) + 96];
static uint8_t w[3*3*(MAX_DCI_SIZE_BITS+16)];
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void dci_encoding(uint8_t *a,
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                  uint8_t A,
                  uint16_t E,
                  uint8_t *e,
                  uint16_t rnti)
{
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  uint8_t D = (A + 16);
  uint32_t RCC;
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#ifdef DEBUG_DCI_ENCODING
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  int32_t i;
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#endif
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  // encode dci
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#ifdef DEBUG_DCI_ENCODING
  msg("Doing DCI encoding for %d bits, e %p, rnti %x\n",A,e,rnti);
#endif

  memset((void *)d,LTE_NULL,96);

  ccodelte_encode(A,2,a,d+96,rnti);

#ifdef DEBUG_DCI_ENCODING
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  for (i=0; i<16+A; i++)
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    msg("%d : (%d,%d,%d)\n",i,*(d+96+(3*i)),*(d+97+(3*i)),*(d+98+(3*i)));
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#endif
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#ifdef DEBUG_DCI_ENCODING
  msg("Doing DCI interleaving for %d coded bits, e %p\n",D*3,e);
#endif
  RCC = sub_block_interleaving_cc(D,d+96,w);

#ifdef DEBUG_DCI_ENCODING
  msg("Doing DCI rate matching for %d channel bits, RCC %d, e %p\n",E,RCC,e);
#endif
  lte_rate_matching_cc(RCC,E,w,e);


}


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uint8_t *generate_dci0(uint8_t *dci,
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                       uint8_t *e,
                       uint8_t DCI_LENGTH,
                       uint8_t aggregation_level,
                       uint16_t rnti)
{

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  uint16_t coded_bits;
  uint8_t dci_flip[8];
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  if (aggregation_level>3) {
    msg("dci.c: generate_dci FATAL, illegal aggregation_level %d\n",aggregation_level);
    return NULL;
  }

  coded_bits = 72 * (1<<aggregation_level);

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  /*

  #ifdef DEBUG_DCI_ENCODING
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  for (i=0;i<1+((DCI_LENGTH+16)/8);i++)
    msg("i %d : %x\n",i,dci[i]);
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  #endif
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  */
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  if (DCI_LENGTH<=32) {
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    dci_flip[0] = dci[3];
    dci_flip[1] = dci[2];
    dci_flip[2] = dci[1];
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    dci_flip[3] = dci[0];
  } else {
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    dci_flip[0] = dci[7];
    dci_flip[1] = dci[6];
    dci_flip[2] = dci[5];
    dci_flip[3] = dci[4];
    dci_flip[4] = dci[3];
    dci_flip[5] = dci[2];
    dci_flip[6] = dci[1];
    dci_flip[7] = dci[0];
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#ifdef DEBUG_DCI_ENCODING
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    msg("DCI => %x,%x,%x,%x,%x,%x,%x,%x\n",
        dci_flip[0],dci_flip[1],dci_flip[2],dci_flip[3],
        dci_flip[4],dci_flip[5],dci_flip[6],dci_flip[7]);
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#endif
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  }
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  dci_encoding(dci_flip,DCI_LENGTH,coded_bits,e,rnti);

  return(e+coded_bits);
}

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uint32_t Y;
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#define CCEBITS 72
#define CCEPERSYMBOL 33  // This is for 1200 RE
#define CCEPERSYMBOL0 22  // This is for 1200 RE
#define DCI_BITS_MAX ((2*CCEPERSYMBOL+CCEPERSYMBOL0)*CCEBITS)
#define Msymb (DCI_BITS_MAX/2)
//#define Mquad (Msymb/4)

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static uint32_t bitrev_cc_dci[32] = {1,17,9,25,5,21,13,29,3,19,11,27,7,23,15,31,0,16,8,24,4,20,12,28,2,18,10,26,6,22,14,30};
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static mod_sym_t wtemp[2][Msymb];

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void pdcch_interleaving(LTE_DL_FRAME_PARMS *frame_parms,mod_sym_t **z, mod_sym_t **wbar,uint8_t n_symbols_pdcch,uint8_t mi)
{
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  mod_sym_t *wptr,*wptr2,*zptr;
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  uint32_t Mquad = get_nquad(n_symbols_pdcch,frame_parms,mi);
  uint32_t RCC = (Mquad>>5), ND;
  uint32_t row,col,Kpi,index;
  int32_t i,k,a;
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#ifdef RM_DEBUG
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  int32_t nulled=0;
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#endif
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  //  msg("[PHY] PDCCH Interleaving Mquad %d (Nsymb %d)\n",Mquad,n_symbols_pdcch);
  if ((Mquad&0x1f) > 0)
    RCC++;
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  Kpi = (RCC<<5);
  ND = Kpi - Mquad;

  k=0;
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  for (col=0; col<32; col++) {
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    index = bitrev_cc_dci[col];

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    for (row=0; row<RCC; row++) {
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      //msg("col %d, index %d, row %d\n",col,index,row);
      if (index>=ND) {
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        for (a=0; a<frame_parms->nb_antennas_tx_eNB; a++) {
          //msg("a %d k %d\n",a,k);

          wptr = &wtemp[a][k<<2];
          zptr = &z[a][(index-ND)<<2];
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          //msg("wptr=%p, zptr=%p\n",wptr,zptr);
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          wptr[0] = zptr[0];
          wptr[1] = zptr[1];
          wptr[2] = zptr[2];
          wptr[3] = zptr[3];
        }
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        k++;
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      }
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      index+=32;
    }
  }

  // permutation
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  for (i=0; i<Mquad; i++) {

    for (a=0; a<frame_parms->nb_antennas_tx_eNB; a++) {
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      //wptr  = &wtemp[a][i<<2];
      //wptr2 = &wbar[a][((i+frame_parms->Nid_cell)%Mquad)<<2];
      wptr = &wtemp[a][((i+frame_parms->Nid_cell)%Mquad)<<2];
      wptr2 = &wbar[a][i<<2];
      wptr2[0] = wptr[0];
      wptr2[1] = wptr[1];
      wptr2[2] = wptr[2];
      wptr2[3] = wptr[3];
    }
  }
}

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void pdcch_demapping(uint16_t *llr,uint16_t *wbar,LTE_DL_FRAME_PARMS *frame_parms,uint8_t num_pdcch_symbols,uint8_t mi)
{
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  uint32_t i, lprime;
  uint16_t kprime,kprime_mod12,mprime,symbol_offset,tti_offset,tti_offset0;
  int16_t re_offset,re_offset0;
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  // This is the REG allocation algorithm from 36-211, second part of Section 6.8.5

  int Msymb2;

  switch (frame_parms->N_RB_DL) {
  case 100:
    Msymb2 = Msymb;
    break;
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  case 75:
    Msymb2 = 3*Msymb/4;
    break;
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  case 50:
    Msymb2 = Msymb>>1;
    break;
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  case 25:
    Msymb2 = Msymb>>2;
    break;
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  case 15:
    Msymb2 = Msymb*15/100;
    break;
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  case 6:
    Msymb2 = Msymb*6/100;
    break;
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  default:
    Msymb2 = Msymb>>2;
    break;
  }
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  mprime=0;


  re_offset = 0;
  re_offset0 = 0; // counter for symbol with pilots (extracted outside!)
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  for (kprime=0; kprime<frame_parms->N_RB_DL*12; kprime++) {
    for (lprime=0; lprime<num_pdcch_symbols; lprime++) {
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      symbol_offset = (uint32_t)frame_parms->N_RB_DL*12*lprime;
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      tti_offset = symbol_offset + re_offset;
      tti_offset0 = symbol_offset + re_offset0;
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      // if REG is allocated to PHICH, skip it
      if (check_phich_reg(frame_parms,kprime,lprime,mi) == 1) {
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        //msg("dci_demapping : skipping REG %d\n",(lprime==0)?kprime/6 : kprime>>2);
        if ((lprime == 0)&&((kprime%6)==0))
          re_offset0+=4;
      } else { // not allocated to PHICH/PCFICH
        //  msg("dci_demapping: REG %d\n",(lprime==0)?kprime/6 : kprime>>2);
        if (lprime == 0) {
          // first symbol, or second symbol+4 TX antennas skip pilots
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 6)) {
            // kprime represents REG

            for (i=0; i<4; i++) {
              wbar[mprime] = llr[tti_offset0+i];
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#ifdef DEBUG_DCI_DECODING
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              msg("[PHY] PDCCH demapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset0,symbol_offset,re_offset0,*(char*)&wbar[mprime],*(1+(char*)&wbar[mprime]));
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#endif
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              mprime++;
              re_offset0++;
            }
          }
        } else if ((lprime==1)&&(frame_parms->nb_antennas_tx_eNB == 4)) {
          // LATER!!!!
        } else { // no pilots in this symbol
          kprime_mod12 = kprime%12;

          if ((kprime_mod12 == 0) || (kprime_mod12 == 4) || (kprime_mod12 == 8)) {
            // kprime represents REG
            for (i=0; i<4; i++) {
              wbar[mprime] = llr[tti_offset+i];
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#ifdef DEBUG_DCI_DECODING
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              msg("[PHY] PDCCH demapping mprime %d => %d (symbol %d re %d) -> (%d,%d)\n",mprime,tti_offset,symbol_offset,re_offset+i,*(char*)&wbar[mprime],*(1+(char*)&wbar[mprime]));
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#endif
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              mprime++;
            }
          }  // is representative
        } // no pilots case
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      } // not allocated to PHICH/PCFICH

      // Stop when all REGs are copied in
      if (mprime>=Msymb2)
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        break;
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    } //lprime loop
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    re_offset++;

  } // kprime loop
}

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static uint16_t wtemp_rx[Msymb];
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void pdcch_deinterleaving(LTE_DL_FRAME_PARMS *frame_parms,uint16_t *z, uint16_t *wbar,uint8_t number_pdcch_symbols,uint8_t mi)
{
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  uint16_t *wptr,*zptr,*wptr2;
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  uint16_t Mquad=get_nquad(number_pdcch_symbols,frame_parms,mi);
  uint32_t RCC = (Mquad>>5), ND;
  uint32_t row,col,Kpi,index;
  int32_t i,k;
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  //  printf("Mquad %d, RCC %d\n",Mquad,RCC);

  if (!z) {
    msg("dci.c: pdcch_deinterleaving: FATAL z is Null\n");
    return;
  }
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  // undo permutation
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  for (i=0; i<Mquad; i++) {
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    //wptr = &wtemp_rx[i<<2];
    //wptr2 = &wbar[((i+frame_parms->Nid_cell)%Mquad)<<2];
    wptr = &wtemp_rx[((i+frame_parms->Nid_cell)%Mquad)<<2];
    wptr2 = &wbar[i<<2];

    wptr[0] = wptr2[0];
    wptr[1] = wptr2[1];
    wptr[2] = wptr2[2];
    wptr[3] = wptr2[3];
    /*
    msg("pdcch_deinterleaving (%p,%p): quad %d -> (%d,%d %d,%d %d,%d %d,%d)\n",wptr,wptr2,i,
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    ((char*)wptr2)[0],
    ((char*)wptr2)[1],
    ((char*)wptr2)[2],
    ((char*)wptr2)[3],
    ((char*)wptr2)[4],
    ((char*)wptr2)[5],
    ((char*)wptr2)[6],
    ((char*)wptr2)[7]);
    */
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  }

  if ((Mquad&0x1f) > 0)
    RCC++;
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  Kpi = (RCC<<5);
  ND = Kpi - Mquad;

  k=0;
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  for (col=0; col<32; col++) {
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    index = bitrev_cc_dci[col];

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    for (row=0; row<RCC; row++) {
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      //      printf("row %d, index %d, Nd %d\n",row,index,ND);
      if (index>=ND) {



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        wptr = &wtemp_rx[k<<2];
        zptr = &z[(index-ND)<<2];

        zptr[0] = wptr[0];
        zptr[1] = wptr[1];
        zptr[2] = wptr[2];
        zptr[3] = wptr[3];

        /*
        printf("deinterleaving ; k %d, index-Nd %d  => (%d,%d,%d,%d,%d,%d,%d,%d)\n",k,(index-ND),
               ((int8_t *)wptr)[0],
               ((int8_t *)wptr)[1],
               ((int8_t *)wptr)[2],
               ((int8_t *)wptr)[3],
               ((int8_t *)wptr)[4],
               ((int8_t *)wptr)[5],
               ((int8_t *)wptr)[6],
               ((int8_t *)wptr)[7]);
        */
        k++;
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      }
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      index+=32;
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    }
  }

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  for (i=0; i<Mquad; i++) {
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    zptr = &z[i<<2];
    /*
    printf("deinterleaving ; quad %d  => (%d,%d,%d,%d,%d,%d,%d,%d)\n",i,
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     ((int8_t *)zptr)[0],
     ((int8_t *)zptr)[1],
     ((int8_t *)zptr)[2],
     ((int8_t *)zptr)[3],
     ((int8_t *)zptr)[4],
     ((int8_t *)zptr)[5],
     ((int8_t *)zptr)[6],
     ((int8_t *)zptr)[7]);
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    */
  }
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}


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int32_t pdcch_qpsk_qpsk_llr(LTE_DL_FRAME_PARMS *frame_parms,
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                            int32_t **rxdataF_comp,
                            int32_t **rxdataF_comp_i,
                            int32_t **rho_i,
                            int16_t *pdcch_llr16,
                            int16_t *pdcch_llr8in,
                            uint8_t symbol)
{
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  int16_t *rxF=(int16_t*)&rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rxF_i=(int16_t*)&rxdataF_comp_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *rho=(int16_t*)&rho_i[0][(symbol*frame_parms->N_RB_DL*12)];
  int16_t *llr128;
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  int32_t i;
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  char *pdcch_llr8;
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  int16_t *pdcch_llr;
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  pdcch_llr8 = (char *)&pdcch_llr8in[symbol*frame_parms->N_RB_DL*12];
  pdcch_llr = &pdcch_llr16[symbol*frame_parms->N_RB_DL*12];

  //  printf("dlsch_qpsk_qpsk: symbol %d\n",symbol);
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  llr128 = (int16_t*)pdcch_llr;
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  if (!llr128) {
    msg("dlsch_qpsk_qpsk_llr: llr is null, symbol %d\n",symbol);
    return -1;
  }

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  qpsk_qpsk(rxF,
            rxF_i,
            llr128,
            rho,
586
            frame_parms->N_RB_DL*12);
587 588

  //prepare for Viterbi which accepts 8 bit, but prefers 4 bit, soft input.
589
  for (i=0; i<(frame_parms->N_RB_DL*24); i++) {
590 591 592 593 594 595 596 597 598 599 600 601 602 603 604
    if (*pdcch_llr>7)
      *pdcch_llr8=7;
    else if (*pdcch_llr<-8)
      *pdcch_llr8=-8;
    else
      *pdcch_llr8 = (char)(*pdcch_llr);

    pdcch_llr++;
    pdcch_llr8++;
  }

  return(0);
}


605
int32_t pdcch_llr(LTE_DL_FRAME_PARMS *frame_parms,
606 607 608 609
                  int32_t **rxdataF_comp,
                  char *pdcch_llr,
                  uint8_t symbol)
{
610

611 612
  int16_t *rxF= (int16_t*) &rxdataF_comp[0][(symbol*frame_parms->N_RB_DL*12)];
  int32_t i;
613 614 615
  char *pdcch_llr8;

  pdcch_llr8 = &pdcch_llr[2*symbol*frame_parms->N_RB_DL*12];
616

617 618 619 620
  if (!pdcch_llr8) {
    msg("pdcch_qpsk_llr: llr is null, symbol %d\n",symbol);
    return(-1);
  }
621

622 623
  //    msg("pdcch qpsk llr for symbol %d (pos %d), llr offset %d\n",symbol,(symbol*frame_parms->N_RB_DL*12),pdcch_llr8-pdcch_llr);

624
  for (i=0; i<(frame_parms->N_RB_DL*((symbol==0) ? 16 : 24)); i++) {
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641

    if (*rxF>31)
      *pdcch_llr8=31;
    else if (*rxF<-32)
      *pdcch_llr8=-32;
    else
      *pdcch_llr8 = (char)(*rxF);

    //    printf("%d %d => %d\n",i,*rxF,*pdcch_llr8);
    rxF++;
    pdcch_llr8++;
  }

  return(0);

}

642
//__m128i avg128P;
643 644

//compute average channel_level on each (TX,RX) antenna pair
645
void pdcch_channel_level(int32_t **dl_ch_estimates_ext,
646 647 648 649
                         LTE_DL_FRAME_PARMS *frame_parms,
                         int32_t *avg,
                         uint8_t nb_rb)
{
650

651 652
  int16_t rb;
  uint8_t aatx,aarx;
653
#if defined(__x86_64__) || defined(__i386__)
654
  __m128i *dl_ch128;
655 656 657 658 659
  __m128i avg128P;
#elif defined(__arm__)
  int16x8_t *dl_ch128;
  int32x4_t *avg128P;
#endif
660 661
  for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++)
    for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
662
      //clear average level
663
#if defined(__x86_64__) || defined(__i386__)
664
      avg128P = _mm_setzero_si128();
665
      dl_ch128=(__m128i *)&dl_ch_estimates_ext[(aatx<<1)+aarx][frame_parms->N_RB_DL*12];
666
#elif defined(__arm__)
667

668
#endif
669 670
      for (rb=0; rb<nb_rb; rb++) {

671
#if defined(__x86_64__) || defined(__i386__)
672 673 674
        avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[0],dl_ch128[0]));
        avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[1],dl_ch128[1]));
        avg128P = _mm_add_epi32(avg128P,_mm_madd_epi16(dl_ch128[2],dl_ch128[2]));
675
#elif defined(__arm__)
676

677
#endif
678 679 680 681 682 683 684 685
        dl_ch128+=3;
        /*
          if (rb==0) {
          print_shorts("dl_ch128",&dl_ch128[0]);
          print_shorts("dl_ch128",&dl_ch128[1]);
          print_shorts("dl_ch128",&dl_ch128[2]);
          }
        */
686 687
      }

688
      DevAssert( nb_rb );
689 690 691 692
      avg[(aatx<<1)+aarx] = (((int32_t*)&avg128P)[0] +
                             ((int32_t*)&avg128P)[1] +
                             ((int32_t*)&avg128P)[2] +
                             ((int32_t*)&avg128P)[3])/(nb_rb*12);
693 694 695

      //            msg("Channel level : %d\n",avg[(aatx<<1)+aarx]);
    }
696

697
#if defined(__x86_64__) || defined(__i386__)
698 699
  _mm_empty();
  _m_empty();
700
#endif
701 702 703

}

704
#if defined(__x86_64) || defined(__i386__)
705
__m128i mmtmpPD0,mmtmpPD1,mmtmpPD2,mmtmpPD3;
706
#elif defined(__arm__)
707

708
#endif
709
void pdcch_dual_stream_correlation(LTE_DL_FRAME_PARMS *frame_parms,
710 711 712 713 714 715
                                   uint8_t symbol,
                                   int32_t **dl_ch_estimates_ext,
                                   int32_t **dl_ch_estimates_ext_i,
                                   int32_t **dl_ch_rho_ext,
                                   uint8_t output_shift)
{
716

717
  uint16_t rb;
718
#if defined(__x86_64__) || defined(__i386__)
719
  __m128i *dl_ch128,*dl_ch128i,*dl_ch_rho128;
720 721 722
#elif defined(__arm__)

#endif
723
  uint8_t aarx;
724 725 726 727

  //  printf("dlsch_dual_stream_correlation: symbol %d\n",symbol);


728
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
729

730
#if defined(__x86_64__) || defined(__i386__)
731 732 733 734
    dl_ch128          = (__m128i *)&dl_ch_estimates_ext[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch128i         = (__m128i *)&dl_ch_estimates_ext_i[aarx][symbol*frame_parms->N_RB_DL*12];
    dl_ch_rho128      = (__m128i *)&dl_ch_rho_ext[aarx][symbol*frame_parms->N_RB_DL*12];

735 736 737
#elif defined(__arm__)

#endif
738

739
    for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
740
      // multiply by conjugated channel
741
#if defined(__x86_64__) || defined(__i386__)
742
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[0],dl_ch128i[0]);
743 744
      //  print_ints("re",&mmtmpPD0);

745 746 747 748
      // mmtmpD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[0],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)&conjugate[0]);
749
      //  print_ints("im",&mmtmpPD1);
750 751 752
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[0]);
      // mmtmpD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
753
      //  print_ints("re(shift)",&mmtmpPD0);
754
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
755
      //  print_ints("im(shift)",&mmtmpPD1);
756 757
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
758 759
      //        print_ints("c0",&mmtmpPD2);
      //  print_ints("c1",&mmtmpPD3);
760
      dl_ch_rho128[0] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
761

762 763 764
      //print_shorts("rx:",dl_ch128_2);
      //print_shorts("ch:",dl_ch128);
      //print_shorts("pack:",rho128);
765

766 767 768 769 770 771 772 773 774 775 776 777
      // multiply by conjugated channel
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[1],dl_ch128i[1]);
      // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[1],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[1]);
      // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
778 779


780 781 782
      dl_ch_rho128[1] =_mm_packs_epi32(mmtmpPD2,mmtmpPD3);
      //print_shorts("rx:",dl_ch128_2+1);
      //print_shorts("ch:",dl_ch128+1);
783
      //print_shorts("pack:",rho128+1);
784 785 786 787 788 789 790 791 792 793 794 795
      // multiply by conjugated channel
      mmtmpPD0 = _mm_madd_epi16(dl_ch128[2],dl_ch128i[2]);
      // mmtmpPD0 contains real part of 4 consecutive outputs (32-bit)
      mmtmpPD1 = _mm_shufflelo_epi16(dl_ch128[2],_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_shufflehi_epi16(mmtmpPD1,_MM_SHUFFLE(2,3,0,1));
      mmtmpPD1 = _mm_sign_epi16(mmtmpPD1,*(__m128i*)conjugate);
      mmtmpPD1 = _mm_madd_epi16(mmtmpPD1,dl_ch128i[2]);
      // mmtmpPD1 contains imag part of 4 consecutive outputs (32-bit)
      mmtmpPD0 = _mm_srai_epi32(mmtmpPD0,output_shift);
      mmtmpPD1 = _mm_srai_epi32(mmtmpPD1,output_shift);
      mmtmpPD2 = _mm_unpacklo_epi32(mmtmpPD0,mmtmpPD1);
      mmtmpPD3 = _mm_unpackhi_epi32(mmtmpPD0,mmtmpPD1);
796

797 798 799 800
      dl_ch_rho128[2] = _mm_packs_epi32(mmtmpPD2,mmtmpPD3);
      //print_shorts("rx:",dl_ch128_2+2);
      //print_shorts("ch:",dl_ch128+2);
      //print_shorts("pack:",rho128+2);
801

802 803 804
      dl_ch128+=3;
      dl_ch128i+=3;
      dl_ch_rho128+=3;
805 806


807
#elif defined(__arm__)
808

809 810 811 812
#endif
     }
  }
#if defined(__x86_64__) || defined(__i386__)
813 814
  _mm_empty();
  _m_empty();
815
#endif
816

817 818 819 820
}


void pdcch_detection_mrc_i(LTE_DL_FRAME_PARMS *frame_parms,
821 822 823 824 825 826
                           int32_t **rxdataF_comp,
                           int32_t **rxdataF_comp_i,
                           int32_t **rho,
                           int32_t **rho_i,
                           uint8_t symbol)
{
827

828
  uint8_t aatx;
829

830
#if defined(__x86_64__) || defined(__i386__)
831
  __m128i *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
832 833 834
#elif defined(__arm__)
  int16x8_t *rxdataF_comp128_0,*rxdataF_comp128_1,*rxdataF_comp128_i0,*rxdataF_comp128_i1,*rho128_0,*rho128_1,*rho128_i0,*rho128_i1;
#endif
835
  int32_t i;
836 837

  if (frame_parms->nb_antennas_rx>1) {
838
    for (aatx=0; aatx<frame_parms->nb_antennas_tx_eNB; aatx++) {
839 840
      //if (frame_parms->mode1_flag && (aatx>0)) break;

841
#if defined(__x86_64__) || defined(__i386__)
842
      rxdataF_comp128_0   = (__m128i *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
843
      rxdataF_comp128_1   = (__m128i *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
844 845 846 847
#elif defined(__arm__)
      rxdataF_comp128_0   = (int16x8_t *)&rxdataF_comp[(aatx<<1)][symbol*frame_parms->N_RB_DL*12];
      rxdataF_comp128_1   = (int16x8_t *)&rxdataF_comp[(aatx<<1)+1][symbol*frame_parms->N_RB_DL*12];
#endif
848
      // MRC on each re of rb on MF output
849
      for (i=0; i<frame_parms->N_RB_DL*3; i++) {
850
#if defined(__x86_64__) || defined(__i386__)
851
        rxdataF_comp128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_0[i],1),_mm_srai_epi16(rxdataF_comp128_1[i],1));
852 853 854
#elif defined(__arm__)
        rxdataF_comp128_0[i] = vhaddq_s16(rxdataF_comp128_0[i],rxdataF_comp128_1[i]);
#endif
855 856
      }
    }
857

858
#if defined(__x86_64__) || defined(__i386__)
859 860
    rho128_0 = (__m128i *) &rho[0][symbol*frame_parms->N_RB_DL*12];
    rho128_1 = (__m128i *) &rho[1][symbol*frame_parms->N_RB_DL*12];
861 862 863 864
#elif defined(__arm__)
    rho128_0 = (int16x8_t *) &rho[0][symbol*frame_parms->N_RB_DL*12];
    rho128_1 = (int16x8_t *) &rho[1][symbol*frame_parms->N_RB_DL*12];
#endif
865
    for (i=0; i<frame_parms->N_RB_DL*3; i++) {
866
#if defined(__x86_64__) || defined(__i386__)
867
      rho128_0[i] = _mm_adds_epi16(_mm_srai_epi16(rho128_0[i],1),_mm_srai_epi16(rho128_1[i],1));
868 869 870
#elif defined(__arm__)
      rho128_0[i] = vhaddq_s16(rho128_0[i],rho128_1[i]);
#endif
871
    }
872

873
#if defined(__x86_64__) || defined(__i386__)
874 875
    rho128_i0 = (__m128i *) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
    rho128_i1 = (__m128i *) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
876
    rxdataF_comp128_i0   = (__m128i *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
877
    rxdataF_comp128_i1   = (__m128i *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];
878 879 880 881 882
#elif defined(__arm__)
    rho128_i0 = (int16x8_t*) &rho_i[0][symbol*frame_parms->N_RB_DL*12];
    rho128_i1 = (int16x8_t*) &rho_i[1][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i0   = (int16x8_t *)&rxdataF_comp_i[0][symbol*frame_parms->N_RB_DL*12];
    rxdataF_comp128_i1   = (int16x8_t *)&rxdataF_comp_i[1][symbol*frame_parms->N_RB_DL*12];
883

884
#endif
885 886
    // MRC on each re of rb on MF and rho
    for (i=0; i<frame_parms->N_RB_DL*3; i++) {
887
#if defined(__x86_64__) || defined(__i386__)
888 889
      rxdataF_comp128_i0[i] = _mm_adds_epi16(_mm_srai_epi16(rxdataF_comp128_i0[i],1),_mm_srai_epi16(rxdataF_comp128_i1[i],1));
      rho128_i0[i]          = _mm_adds_epi16(_mm_srai_epi16(rho128_i0[i],1),_mm_srai_epi16(rho128_i1[i],1));
890 891 892 893 894
#elif defined(__arm__)
      rxdataF_comp128_i0[i] = vhaddq_s16(rxdataF_comp128_i0[i],rxdataF_comp128_i1[i]);
      rho128_i0[i]          = vhaddq_s16(rho128_i0[i],rho128_i1[i]);

#endif
895 896
    }
  }
897

898
#if defined(__x86_64__) || defined(__i386__)
899 900
  _mm_empty();
  _m_empty();
901
#endif
902 903 904
}


905
void pdcch_extract_rbs_single(int32_t **rxdataF,
906 907 908 909 910 911 912
                              int32_t **dl_ch_estimates,
                              int32_t **rxdataF_ext,
                              int32_t **dl_ch_estimates_ext,
                              uint8_t symbol,
                              uint32_t high_speed_flag,
                              LTE_DL_FRAME_PARMS *frame_parms)
{
913 914


915 916 917
  uint16_t rb,nb_rb=0;
  uint8_t i,j,aarx;
  int32_t *dl_ch0,*dl_ch0_ext,*rxF,*rxF_ext;
918

919 920

  int nushiftmod3 = frame_parms->nushift%3;
921
  uint8_t symbol_mod;
922 923 924 925 926

  symbol_mod = (symbol>=(7-frame_parms->Ncp)) ? symbol-(7-frame_parms->Ncp) : symbol;
#ifdef DEBUG_DCI_DECODING
  msg("[PHY] extract_rbs_single: symbol_mod %d\n",symbol_mod);
#endif
927 928

  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
929 930 931 932 933

    if (high_speed_flag == 1)
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
    else
      dl_ch0     = &dl_ch_estimates[aarx][5];
934

935 936 937 938 939
    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];
940

941
    if ((frame_parms->N_RB_DL&1) == 0)  { // even number of RBs
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
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];

          //dl_ch0++;
        }

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++) {

            rxF_ext[i]=rxF[i];

          }

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=(nushiftmod3+3)) &&
                (i!=(nushiftmod3+6)) &&
                (i!=(nushiftmod3+9))) {
              rxF_ext[j]=rxF[i];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
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 1020 1021 1022 1023 1024 1025
    } else { // Odd number of RBs
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=(nushiftmod3+3)) &&
                (i!=(nushiftmod3+6)) &&
                (i!=(nushiftmod3+9))) {
              rxF_ext[j]=rxF[i];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
1026
      }
1027

1028
      // Do middle RB (around DC)
1029
      //  msg("dlch_ext %d\n",dl_ch0_ext-&dl_ch_estimates_ext[aarx][0]);
1030 1031

      if (symbol_mod==0) {
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
        j=0;

        for (i=0; i<6; i++) {
          if ((i!=nushiftmod3) &&
              (i!=(nushiftmod3+3))) {
            dl_ch0_ext[j]=dl_ch0[i];
            rxF_ext[j++]=rxF[i];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }

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

        for (; i<12; i++) {
          if ((i!=(nushiftmod3+6)) &&
              (i!=(nushiftmod3+9))) {
            dl_ch0_ext[j]=dl_ch0[i];
            rxF_ext[j++]=rxF[(1+i-6)];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }


        nb_rb++;
        dl_ch0_ext+=8;
        rxF_ext+=8;
        dl_ch0+=12;
        rxF+=7;
        rb++;
      } else {
        for (i=0; i<6; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          rxF_ext[i]=rxF[i];
        }

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

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


        nb_rb++;
        dl_ch0_ext+=12;
        rxF_ext+=12;
        dl_ch0+=12;
        rxF+=7;
        rb++;
1081 1082
      }

1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116
      for (; rb<frame_parms->N_RB_DL; rb++) {
        if (symbol_mod > 0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=(nushiftmod3)) &&
                (i!=(nushiftmod3+3)) &&
                (i!=(nushiftmod3+6)) &&
                (i!=(nushiftmod3+9))) {
              rxF_ext[j]=rxF[i];
              //                printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j++]=dl_ch0[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          rxF+=12;
        }
1117 1118 1119 1120 1121
      }
    }
  }
}

1122
void pdcch_extract_rbs_dual(int32_t **rxdataF,
1123 1124 1125 1126 1127 1128 1129 1130
                            int32_t **dl_ch_estimates,
                            int32_t **rxdataF_ext,
                            int32_t **dl_ch_estimates_ext,
                            uint8_t symbol,
                            uint32_t high_speed_flag,
                            LTE_DL_FRAME_PARMS *frame_parms)
{

1131

1132 1133 1134 1135
  uint16_t rb,nb_rb=0;
  uint8_t i,aarx,j;
  int32_t *dl_ch0,*dl_ch0_ext,*dl_ch1,*dl_ch1_ext,*rxF,*rxF_ext;
  uint8_t symbol_mod;
1136 1137 1138 1139
  int nushiftmod3 = frame_parms->nushift%3;

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

1140
  for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
1141 1142 1143 1144

    if (high_speed_flag==1) {
      dl_ch0     = &dl_ch_estimates[aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
      dl_ch1     = &dl_ch_estimates[2+aarx][5+(symbol*(frame_parms->ofdm_symbol_size))];
1145
    } else {
1146 1147 1148
      dl_ch0     = &dl_ch_estimates[aarx][5];
      dl_ch1     = &dl_ch_estimates[2+aarx][5];
    }
1149

1150 1151 1152 1153 1154 1155 1156
    dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];
    dl_ch1_ext = &dl_ch_estimates_ext[2+aarx][symbol*(frame_parms->N_RB_DL*12)];

    //    msg("pdcch extract_rbs: rxF_ext pos %d\n",symbol*(frame_parms->N_RB_DL*12));
    rxF_ext   = &rxdataF_ext[aarx][symbol*(frame_parms->N_RB_DL*12)];

    rxF       = &rxdataF[aarx][(frame_parms->first_carrier_offset + (symbol*(frame_parms->ofdm_symbol_size)))];
1157

1158
    if ((frame_parms->N_RB_DL&1) == 0)  // even number of RBs
1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
      for (rb=0; rb<frame_parms->N_RB_DL; rb++) {

        // For second half of RBs skip DC carrier
        if (rb==(frame_parms->N_RB_DL>>1)) {
          rxF       = &rxdataF[aarx][(1 + (symbol*(frame_parms->ofdm_symbol_size)))];
          //    dl_ch0++;
          //dl_ch1++;
        }

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          /*
            msg("rb %d\n",rb);
            for (i=0;i<12;i++)
            msg("(%d %d)",((int16_t *)dl_ch0)[i<<1],((int16_t*)dl_ch0)[1+(i<<1)]);
            msg("\n");
          */
          for (i=0; i<12; i++) {
            rxF_ext[i]=rxF[i];
            //      msg("%d : (%d,%d)\n",(rxF+(2*i)-&rxdataF[aarx][( (symbol*(frame_parms->ofdm_symbol_size)))*2])/2,
            //  ((int16_t*)&rxF[i<<1])[0],((int16_t*)&rxF[i<<1])[0]);
          }

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=nushiftmod3+3) &&
                (i!=nushiftmod3+6) &&
                (i!=nushiftmod3+9)) {
              rxF_ext[j]=rxF[i];
              //                            printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]  =dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;
        }

        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=12;
1212
      }
1213

1214
    else {  // Odd number of RBs
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263
      for (rb=0; rb<frame_parms->N_RB_DL>>1; rb++) {

        //  msg("rb %d: %d\n",rb,rxF-&rxdataF[aarx][(symbol*(frame_parms->ofdm_symbol_size))*2]);

        if (symbol_mod>0) {
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;

        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=nushiftmod3+3) &&
                (i!=nushiftmod3+6) &&
                (i!=nushiftmod3+9)) {
              rxF_ext[j]=rxF[i];
              //                        printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]=dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
              //                printf("ch %d => (%d,%d)\n",i,*(short *)&dl_ch0[i],*(1+(short*)&dl_ch0[i]));
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;


          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        }
      }

      // Do middle RB (around DC)
1264 1265

      if (symbol_mod > 0) {
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
        for (i=0; i<6; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          dl_ch1_ext[i]=dl_ch1[i];
          rxF_ext[i]=rxF[i];
        }

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

        for (; i<12; i++) {
          dl_ch0_ext[i]=dl_ch0[i];
          dl_ch1_ext[i]=dl_ch1[i];
          rxF_ext[i]=rxF[(1+i)];
        }

        nb_rb++;
        dl_ch0_ext+=12;
        dl_ch1_ext+=12;
        rxF_ext+=12;

        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=7;
        rb++;
      } else {
        j=0;

        for (i=0; i<6; i++) {
          if ((i!=nushiftmod3) &&
              (i!=nushiftmod3+3)) {
            dl_ch0_ext[j]=dl_ch0[i];
            dl_ch1_ext[j]=dl_ch1[i];
            rxF_ext[j++]=rxF[i];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }

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

        for (; i<12; i++) {
          if ((i!=nushiftmod3+6) &&
              (i!=nushiftmod3+9)) {
            dl_ch0_ext[j]=dl_ch0[i];
            dl_ch1_ext[j]=dl_ch1[i];
            rxF_ext[j++]=rxF[(1+i-6)];
            //              printf("**extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j-1],*(1+(short*)&rxF_ext[j-1]));
          }
        }


        nb_rb++;
        dl_ch0_ext+=8;
        dl_ch1_ext+=8;
        rxF_ext+=8;
        dl_ch0+=12;
        dl_ch1+=12;
        rxF+=7;
        rb++;
1323 1324
      }

1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
      for (; rb<frame_parms->N_RB_DL; rb++) {

        if (symbol_mod>0) {
          //  msg("rb %d: %d\n",rb,rxF-&rxdataF[aarx][(symbol*(frame_parms->ofdm_symbol_size))*2]);
          memcpy(dl_ch0_ext,dl_ch0,12*sizeof(int32_t));
          memcpy(dl_ch1_ext,dl_ch1,12*sizeof(int32_t));

          for (i=0; i<12; i++)
            rxF_ext[i]=rxF[i];

          nb_rb++;
          dl_ch0_ext+=12;
          dl_ch1_ext+=12;
          rxF_ext+=12;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        } else {
          j=0;

          for (i=0; i<12; i++) {
            if ((i!=nushiftmod3) &&
                (i!=nushiftmod3+3) &&
                (i!=nushiftmod3+6) &&
                (i!=nushiftmod3+9)) {
              rxF_ext[j]=rxF[i];
              //                printf("extract rb %d, re %d => (%d,%d)\n",rb,i,*(short *)&rxF_ext[j],*(1+(short*)&rxF_ext[j]));
              dl_ch0_ext[j]=dl_ch0[i];
              dl_ch1_ext[j++]=dl_ch1[i];
            }
          }

          nb_rb++;
          dl_ch0_ext+=8;
          dl_ch1_ext+=8;
          rxF_ext+=8;

          dl_ch0+=12;
          dl_ch1+=12;
          rxF+=12;
        }
1367 1368 1369 1370 1371 1372
      }
    }
  }
}


1373
void pdcch_channel_compensation(int32_t **rxdataF_ext,
1374 1375 1376 1377 1378 1379 1380
                                int32_t **dl_ch_estimates_ext,
                                int32_t **rxdataF_comp,
                                int32_t **rho,
                                LTE_DL_FRAME_PARMS *frame_parms,
                                uint8_t symbol,
                                uint8_t output_shift)
{
1381

1382
  uint16_t rb;
1383
#if defined(__x86_64__) || defined(__i386__)
1384 1385
  __m128i *dl_ch128,*rxdataF128,*rxdataF_comp128;
  __m128i *dl_ch128_2, *rho128;
1386 1387 1388
#elif defined(__arm__)

#endif
1389
  uint8_t aatx,aarx,pilots=0;