ulsch_coding.c 28.2 KB
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/*******************************************************************************

  Eurecom OpenAirInterface
  Copyright(c) 1999 - 2011 Eurecom

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information
  Openair Admin: openair_admin@eurecom.fr
  Openair Tech : openair_tech@eurecom.fr
  Forums       : http://forums.eurecom.fsr/openairinterface
  Address      : Eurecom, 2229, route des crêtes, 06560 Valbonne Sophia Antipolis, France

*******************************************************************************/

/*! \file PHY/LTE_TRANSPORT/ulsch_coding.c
* \brief Top-level routines for coding the ULSCH transport channel as described in 36.212 V8.6 2009-03
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/

#include "PHY/defs.h"
#include "PHY/extern.h"

#include "PHY/CODING/defs.h"
#include "PHY/CODING/extern.h"
#include "PHY/CODING/lte_interleaver_inline.h"
#include "PHY/LTE_TRANSPORT/defs.h"
#include "defs.h"
#include "extern.h"
#include "SIMULATION/ETH_TRANSPORT/extern.h"
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#include "UTIL/LOG/vcd_signal_dumper.h"
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//#define DEBUG_ULSCH_CODING 
//#define DEBUG_ULSCH_FREE 1

/*
#define is_not_pilot(pilots,first_pilot,re) (pilots==0) || \ 
	((pilots==1)&&(first_pilot==1)&&(((re>2)&&(re<6))||((re>8)&&(re<12)))) || \
	((pilots==1)&&(first_pilot==0)&&(((re<3))||((re>5)&&(re<9)))) \
*/
#define is_not_pilot(pilots,first_pilot,re) (1)




void free_ue_ulsch(LTE_UE_ULSCH_t *ulsch) {
  int i;
  int r;

  if (ulsch) {
#ifdef DEBUG_ULSCH_FREE
    msg("Freeing ulsch %p\n",ulsch);
#endif
    for (i=0;i<ulsch->Mdlharq;i++) {
#ifdef DEBUG_ULSCH_FREE
      msg("Freeing ulsch process %d\n",i);
#endif
      if (ulsch->harq_processes[i]) {
#ifdef DEBUG_ULSCH_FREE
	msg("Freeing ulsch process %d (%p)\n",i,ulsch->harq_processes[i]);
#endif
	if (ulsch->harq_processes[i]->b) {
	  free16(ulsch->harq_processes[i]->b,MAX_ULSCH_PAYLOAD_BYTES);
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	  ulsch->harq_processes[i]->b = NULL;
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#ifdef DEBUG_ULSCH_FREE
	  msg("Freeing ulsch process %d b (%p)\n",i,ulsch->harq_processes[i]->b);
#endif
	}
	if (ulsch->harq_processes[i]->c) {
#ifdef DEBUG_ULSCH_FREE
	  msg("Freeing ulsch process %d c (%p)\n",i,ulsch->harq_processes[i]->c);
#endif
	  for (r=0;r<MAX_NUM_ULSCH_SEGMENTS;r++) {

#ifdef DEBUG_ULSCH_FREE
	    msg("Freeing ulsch process %d c[%d] (%p)\n",i,r,ulsch->harq_processes[i]->c[r]);
#endif
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	    if (ulsch->harq_processes[i]->c[r]) {
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	      free16(ulsch->harq_processes[i]->c[r],((r==0)?8:0) + 3+768);
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	      ulsch->harq_processes[i]->c[r] = NULL;
	    }
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	  }
	}
	free16(ulsch->harq_processes[i],sizeof(LTE_UL_UE_HARQ_t));
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	ulsch->harq_processes[i] = NULL;
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      }
    }
    free16(ulsch,sizeof(LTE_UE_ULSCH_t));
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    ulsch = NULL;
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  }
  
}

LTE_UE_ULSCH_t *new_ue_ulsch(unsigned char Mdlharq,unsigned char N_RB_UL, u8 abstraction_flag) {

  LTE_UE_ULSCH_t *ulsch;
  unsigned char exit_flag = 0,i,j,r;
  unsigned char bw_scaling =1;
  
  switch (N_RB_UL){
  case 6: 
    bw_scaling =16;
    break;
  case 25:
    bw_scaling =4;
    break;
  case 50: 
    bw_scaling =2;
    break;
  default:
    bw_scaling =1;
    break;
  }
  ulsch = (LTE_UE_ULSCH_t *)malloc16(sizeof(LTE_UE_ULSCH_t));
  if (ulsch) {
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    memset(ulsch,0,sizeof(LTE_UE_ULSCH_t));
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    ulsch->Mdlharq = Mdlharq;
    for (i=0;i<Mdlharq;i++) {
      ulsch->harq_processes[i] = (LTE_UL_UE_HARQ_t *)malloc16(sizeof(LTE_UL_UE_HARQ_t));
      //      printf("ulsch->harq_processes[%d] %p\n",i,ulsch->harq_processes[i]);
      if (ulsch->harq_processes[i]) {
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	memset(ulsch->harq_processes[i], 0, sizeof(LTE_UL_UE_HARQ_t));
	ulsch->harq_processes[i]->b = (unsigned char*)malloc16(MAX_ULSCH_PAYLOAD_BYTES/bw_scaling);
	if (ulsch->harq_processes[i]->b) 
	  memset(ulsch->harq_processes[i]->b,0,MAX_ULSCH_PAYLOAD_BYTES/bw_scaling);
	else {
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	  LOG_E(PHY,"Can't get b\n");
	  exit_flag=1;
	}
	if (abstraction_flag==0) {
	  for (r=0;r<MAX_NUM_ULSCH_SEGMENTS;r++) {
	    ulsch->harq_processes[i]->c[r] = (unsigned char*)malloc16(((r==0)?8:0) + 3+768);  // account for filler in first segment and CRCs for multiple segment case
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	    if (ulsch->harq_processes[i]->c[r]) 
	      memset(ulsch->harq_processes[i]->c[r],0,((r==0)?8:0) + 3+768);
	    else {
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	      LOG_E(PHY,"Can't get c\n");
	      exit_flag=2;
	    }
	  }
	}
	ulsch->harq_processes[i]->subframe_scheduling_flag = 0;
      }	else {
	LOG_E(PHY,"Can't get harq_p %d\n",i);
	exit_flag=3;
      }
    }

    if ((abstraction_flag == 0) && (exit_flag==0)) {
      for (i=0;i<Mdlharq;i++)
	for (j=0;j<96;j++)
	  for (r=0;r<MAX_NUM_ULSCH_SEGMENTS;r++)
	    ulsch->harq_processes[i]->d[r][j] = LTE_NULL;
      return(ulsch);
    }
    else if (abstraction_flag==1)
      return(ulsch);
  }
  LOG_E(PHY,"new_ue_ulsch exit flag, size of  %d ,   %d\n",exit_flag, sizeof(LTE_UE_ULSCH_t));
  free_ue_ulsch(ulsch);
  return(NULL);
  
  
}


u32 ulsch_encoding(u8 *a,
		   PHY_VARS_UE *phy_vars_ue,
		   u8 harq_pid,
		   u8 eNB_id,
		   u8 tmode,
		   u8 control_only_flag,
		   u8 Nbundled) {

  time_stats_t *seg_stats=&phy_vars_ue->ulsch_segmentation_stats;
  time_stats_t *rm_stats=&phy_vars_ue->ulsch_rate_matching_stats;
  time_stats_t *te_stats=&phy_vars_ue->ulsch_turbo_encoding_stats;
  time_stats_t *i_stats=&phy_vars_ue->ulsch_interleaving_stats;
  time_stats_t *m_stats=&phy_vars_ue->ulsch_multiplexing_stats;
  
  //  u16 offset;
  u32 crc=1;
  u16 iind;
  u32 A;
  u8 Q_m=0;
  u32 Kr=0,Kr_bytes,r,r_offset=0;
  u8 y[6*14*1200],*yptr;;
  u8 *columnset;
  u32 sumKr=0;
  u32 Qprime,L,G,Q_CQI=0,Q_RI=0,Q_ACK=0,H=0,Hprime=0,Hpp=0,Cmux=0,Rmux=0,Rmux_prime=0;
  u32 Qprime_ACK=0,Qprime_CQI=0,Qprime_RI=0,len_ACK=0,len_RI=0;
  //  u32 E;
  u8 ack_parity;
  u32 i,q,j,iprime,j2;
  u16 o_RCC;
  u8 o_flip[8];
  u32 wACK_idx;
  LTE_DL_FRAME_PARMS *frame_parms=&phy_vars_ue->lte_frame_parms;
  PHY_MEASUREMENTS *meas = &phy_vars_ue->PHY_measurements;
  LTE_UE_ULSCH_t *ulsch=phy_vars_ue->ulsch_ue[eNB_id];
  LTE_UE_DLSCH_t **dlsch = phy_vars_ue->dlsch_ue[eNB_id];
  double sinr_eff;
  u16 rnti;
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  if (!ulsch) {
    LOG_E(PHY,"Null ulsch ptr %p\n",ulsch);
    return(-1);
  }

  if (harq_pid > 7) {
    LOG_E(PHY,"Illegal harq_pid %d\n",harq_pid);
    return(-1);
  }
    
  if (ulsch->harq_processes[harq_pid]->O_ACK > 2)
    {
      LOG_E(PHY,"Illegal O_ACK %d\n",ulsch->harq_processes[harq_pid]->O_ACK);
      return(-1);
    }

  if (ulsch->O_RI > 1)
    {
      LOG_E(PHY,"Illegal O_RI %d\n",ulsch->O_RI);
    return(-1);
  }

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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_IN);

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  // fill CQI/PMI information
  if (ulsch->O>0) {
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    if (flag_LA==1)
      sinr_eff = sinr_eff_cqi_calc(phy_vars_ue, 0); //eNB_id is missing here
    else
      sinr_eff = 0;
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    rnti = phy_vars_ue->lte_ue_pdcch_vars[eNB_id]->crnti;
    fill_CQI(ulsch->o,ulsch->uci_format,meas,0,rnti, tmode,sinr_eff);
   
    LOG_D(PHY,"UE CQI\n");
    print_CQI(ulsch->o,ulsch->uci_format,0);

    // save PUSCH pmi for later (transmission modes 4,5,6)
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    if (dlsch[0]) {
      //LOG_I(PHY,"XXX saving pmi for DL %x\n",pmi2hex_2Ar1(((wideband_cqi_rank1_2A_5MHz *)ulsch->o)->pmi));
      dlsch[0]->pmi_alloc = ((wideband_cqi_rank1_2A_5MHz *)ulsch->o)->pmi;
    }
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  }

  if (ulsch->O<=32) {
    o_flip[0] = ulsch->o[3];
    o_flip[1] = ulsch->o[2];
    o_flip[2] = ulsch->o[1];
    o_flip[3] = ulsch->o[0];   
  }
  else {
    o_flip[0] = ulsch->o[7];
    o_flip[1] = ulsch->o[6];
    o_flip[2] = ulsch->o[5];
    o_flip[3] = ulsch->o[4];
    o_flip[4] = ulsch->o[3];
    o_flip[5] = ulsch->o[2];
    o_flip[6] = ulsch->o[1];
    o_flip[7] = ulsch->o[0];
  }
  if (control_only_flag == 0) {
    A=ulsch->harq_processes[harq_pid]->TBS;
    Q_m = get_Qm_ul(ulsch->harq_processes[harq_pid]->mcs);

    ulsch->harq_processes[harq_pid]->control_only = 0;
    
#ifdef DEBUG_ULSCH_CODING
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  msg("[PHY][UE] ULSCH coding : A %d, Qm %d, mcs %d, harq_pid %d, round %d, RV %d\n",
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      ulsch->harq_processes[harq_pid]->TBS,
      Q_m,
      ulsch->harq_processes[harq_pid]->mcs,
      harq_pid,
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      ulsch->harq_processes[harq_pid]->round,
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      ulsch->harq_processes[harq_pid]->rvidx);

  for (i=0;i<ulsch->harq_processes[harq_pid]->O_ACK;i++)
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    msg("ulsch_coding: o_ACK[%d] %d\n",i,ulsch->o_ACK[i]);
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  for (i=0;i<ulsch->O_RI;i++)
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    msg("ulsch_coding: o_RI[%d] %d\n",i,ulsch->o_RI[i]);
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  msg("ulsch_coding: O=%d\n",ulsch->O);
  
  for (i=0;i<1+((8+ulsch->O)/8);i++) {
    //    ulsch->o[i] = i;
    msg("ulsch_coding: O[%d] %d\n",i,ulsch->o[i]);
  }
  if ((tmode != 4))
    print_CQI(ulsch->o,wideband_cqi_rank1_2A,0);
  else
    print_CQI(ulsch->o,HLC_subband_cqi_rank1_2A,0);
#endif
    
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    if (ulsch->harq_processes[harq_pid]->round == 0) {  // this is a new packet
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      start_meas(seg_stats);
      // Add 24-bit crc (polynomial A) to payload
      crc = crc24a(a,
		   A)>>8;
      
      a[A>>3] = ((u8*)&crc)[2];
      a[1+(A>>3)] = ((u8*)&crc)[1];
      a[2+(A>>3)] = ((u8*)&crc)[0];
      
      ulsch->harq_processes[harq_pid]->B = A+24;
      ulsch->harq_processes[harq_pid]->b = a;
      lte_segmentation(ulsch->harq_processes[harq_pid]->b,
		       ulsch->harq_processes[harq_pid]->c,
		       ulsch->harq_processes[harq_pid]->B,
		       &ulsch->harq_processes[harq_pid]->C,
		       &ulsch->harq_processes[harq_pid]->Cplus,
		       &ulsch->harq_processes[harq_pid]->Cminus,
		       &ulsch->harq_processes[harq_pid]->Kplus,
		       &ulsch->harq_processes[harq_pid]->Kminus,		     
		       &ulsch->harq_processes[harq_pid]->F);

      stop_meas(seg_stats);
      
      for (r=0;r<ulsch->harq_processes[harq_pid]->C;r++) {
	if (r<ulsch->harq_processes[harq_pid]->Cminus)
	  Kr = ulsch->harq_processes[harq_pid]->Kminus;
	else
	  Kr = ulsch->harq_processes[harq_pid]->Kplus;
	Kr_bytes = Kr>>3;
	
	// get interleaver index for Turbo code (lookup in Table 5.1.3-3 36-212, V8.6 2009-03, p. 13-14)
	if (Kr_bytes<=64)
	  iind = (Kr_bytes-5);
	else if (Kr_bytes <=128)
	  iind = 59 + ((Kr_bytes-64)>>1);
	else if (Kr_bytes <= 256)
	  iind = 91 + ((Kr_bytes-128)>>2);
	else if (Kr_bytes <= 768)
	  iind = 123 + ((Kr_bytes-256)>>3);
	else {
	  LOG_E(PHY,"ulsch_coding: Illegal codeword size %d!!!\n",Kr_bytes);
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	  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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	  return(-1);
	}
	
	
#ifdef DEBUG_ULSCH_CODING
	msg("Generating Code Segment %d (%d bits)\n",r,Kr);
	// generate codewords
	
	msg("bits_per_codeword (Kr)= %d\n",Kr);
	msg("N_RB = %d\n",ulsch->harq_processes[harq_pid]->nb_rb);
	msg("Ncp %d\n",frame_parms->Ncp);
	msg("Qm %d\n",Q_m);
#endif
	
	//	offset=0;
	
	
#ifdef DEBUG_ULSCH_CODING    
	msg("Encoding ... iind %d f1 %d, f2 %d\n",iind,f1f2mat_old[iind*2],f1f2mat_old[(iind*2)+1]);
#endif
	start_meas(te_stats);
	threegpplte_turbo_encoder(ulsch->harq_processes[harq_pid]->c[r],
				  Kr>>3, 
				  &ulsch->harq_processes[harq_pid]->d[r][96],
				  (r==0) ? ulsch->harq_processes[harq_pid]->F : 0,
				  f1f2mat_old[iind*2],   // f1 (see 36212-820, page 14)
				  f1f2mat_old[(iind*2)+1]  // f2 (see 36212-820, page 14)
				  );
	stop_meas(te_stats);
#ifdef DEBUG_ULSCH_CODING
	if (r==0)
	  write_output("enc_output0.m","enc0",&ulsch->harq_processes[harq_pid]->d[r][96],(3*8*Kr_bytes)+12,1,4);
#endif
	start_meas(i_stats);
	ulsch->harq_processes[harq_pid]->RTC[r] = 
	  sub_block_interleaving_turbo(4+(Kr_bytes*8), 
				       &ulsch->harq_processes[harq_pid]->d[r][96], 
				       ulsch->harq_processes[harq_pid]->w[r]);
	stop_meas(i_stats);
      }
      
    }
    
    if (ulsch->harq_processes[harq_pid]->C == 0) {
      LOG_E(PHY,"null segment\n");
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      vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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      return(-1);
    }
    
    sumKr = 0;
    for (r=0;r<ulsch->harq_processes[harq_pid]->C;r++) {
      if (r<ulsch->harq_processes[harq_pid]->Cminus)
	Kr = ulsch->harq_processes[harq_pid]->Kminus;
      else
      Kr = ulsch->harq_processes[harq_pid]->Kplus;
      sumKr += Kr;
    }
  }
  else { // This is a control-only PUSCH, set sumKr to O_CQI-MIN
    ulsch->harq_processes[harq_pid]->control_only = 1;
    sumKr = ulsch->O_CQI_MIN;
  }
  ulsch->harq_processes[harq_pid]->sumKr = sumKr;
  // Compute Q_ri (p. 23 36-212)

  Qprime = ulsch->O_RI*ulsch->harq_processes[harq_pid]->Msc_initial*ulsch->harq_processes[harq_pid]->Nsymb_initial * ulsch->beta_offset_ri_times8;
  if (Qprime > 0) {
    if ((Qprime % (8*sumKr)) > 0)
      Qprime = 1+(Qprime/(8*sumKr));
    else
      Qprime = Qprime/(8*sumKr);
    
    if (Qprime > 4*ulsch->harq_processes[harq_pid]->nb_rb * 12)
      Qprime = 4*ulsch->harq_processes[harq_pid]->nb_rb * 12;
  }

  Q_RI = Q_m*Qprime;
  Qprime_RI = Qprime;

  // Compute Q_ack (p. 23 36-212)
  Qprime = ulsch->harq_processes[harq_pid]->O_ACK*ulsch->harq_processes[harq_pid]->Msc_initial*ulsch->harq_processes[harq_pid]->Nsymb_initial * ulsch->beta_offset_harqack_times8;
  if (Qprime > 0) {
    if ((Qprime % (8*sumKr)) > 0)
      Qprime = 1+(Qprime/(8*sumKr));
    else
      Qprime = Qprime/(8*sumKr);
    
    if (Qprime > 4*ulsch->harq_processes[harq_pid]->nb_rb * 12)
      Qprime = 4*ulsch->harq_processes[harq_pid]->nb_rb * 12;
  }

  Q_ACK = Qprime * Q_m;
  Qprime_ACK = Qprime;

  // Compute Q_cqi, assume O>11, p. 26 36-212
  if (control_only_flag == 0) {
    
    if (ulsch->O < 12)
      L=0;
    else 
      L=8;
    if (ulsch->O > 0)
      Qprime = (ulsch->O + L) * ulsch->harq_processes[harq_pid]->Msc_initial*ulsch->harq_processes[harq_pid]->Nsymb_initial * ulsch->beta_offset_cqi_times8;
    else
      Qprime = 0;
    if (Qprime > 0) {
      if ((Qprime % (8*sumKr)) > 0)
	Qprime = 1+(Qprime/(8*sumKr));
      else
	Qprime = Qprime/(8*sumKr);
    }
    
    G = ulsch->harq_processes[harq_pid]->nb_rb * (12 * Q_m) * (ulsch->Nsymb_pusch);

    if (Qprime > (G - ulsch->O_RI))
      Qprime = G - ulsch->O_RI;
    Q_CQI = Q_m * Qprime;
    Qprime_CQI = Qprime;


  
    G = G - Q_RI - Q_CQI;
    
    if ((int)G < 0) {
      LOG_E(PHY,"FATAL: ulsch_coding.c G < 0 (%d) : Q_RI %d, Q_CQI %d, O %d, betaCQI_times8 %d)\n",G,Q_RI,Q_CQI,ulsch->O,ulsch->beta_offset_cqi_times8);
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      vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);      
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      return(-1);
    }


    // Data and control multiplexing (5.2.2.7 36-212)

    H = G + Q_CQI;
    Hprime = H/Q_m;



    // Fill in the "e"-sequence from 36-212, V8.6 2009-03, p. 16-17 (for each "e") and concatenate the
    // outputs for each code segment, see Section 5.1.5 p.20
    
    for (r=0;r<ulsch->harq_processes[harq_pid]->C;r++) {
#ifdef DEBUG_ULSCH_CODING
      msg("Rate Matching, Code segment %d (coded bits (G) %d,unpunctured/repeated bits per code segment %d,mod_order %d, nb_rb %d)...\n",
	  r,
	  G,
	  Kr*3,
	  Q_m,ulsch->harq_processes[harq_pid]->nb_rb);
#endif
      
      start_meas(rm_stats);      
      r_offset += lte_rate_matching_turbo(ulsch->harq_processes[harq_pid]->RTC[r],
					  G,
					  ulsch->harq_processes[harq_pid]->w[r],
					  &ulsch->e[0],
					  ulsch->harq_processes[harq_pid]->C, // C
					  NSOFT,                    // Nsoft,
					  ulsch->Mdlharq,
					  1,
					  ulsch->harq_processes[harq_pid]->rvidx,
					  get_Qm_ul(ulsch->harq_processes[harq_pid]->mcs),
					  1,
					  r,
					  ulsch->harq_processes[harq_pid]->nb_rb,
					  ulsch->harq_processes[harq_pid]->mcs);                       // r
      stop_meas(rm_stats);
#ifdef DEBUG_ULSCH_CODING
      if (r==ulsch->harq_processes[harq_pid]->C-1)
	write_output("enc_output.m","enc",ulsch->e,r_offset,1,4);
#endif
    }
  }
  else {  //control-only PUSCH
    Q_CQI = (ulsch->harq_processes[harq_pid]->nb_rb * (12 * Q_m) * (ulsch->Nsymb_pusch)) - Q_RI;
    H = Q_CQI;
    Hprime = H/Q_m;
  }


  //  Do CQI coding
  if ((ulsch->O>1) && (ulsch->O < 12)) {
    LOG_E(PHY,"short CQI sizes not supported yet\n");
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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    return(-1);
  }
  else {
    // add 8-bit CRC
    crc = crc8(o_flip,
	       ulsch->O)>>24;
#ifdef DEBUG_ULSCH_CODING
    printf("crc(cqi) tx : %x\n",crc);
#endif
    memset((void *)&ulsch->o_d[0],LTE_NULL,96);
    
    ccodelte_encode(ulsch->O,
		    1,
		    o_flip,
		    &ulsch->o_d[96],
		    0);


    o_RCC = sub_block_interleaving_cc(8+ulsch->O, 
				      &ulsch->o_d[96], 
				      ulsch->o_w);

    lte_rate_matching_cc(o_RCC,
			 Q_CQI,
			 ulsch->o_w,
			 ulsch->q);
    
  }

  i=0;
  //  Do RI coding
  if (ulsch->O_RI == 1) {
    switch (Q_m) {
    case 2:
      ulsch->q_RI[0] = ulsch->o_RI[0];
      ulsch->q_RI[1] = PUSCH_y;//ulsch->o_RI[0];
      len_RI=2;
      break;
    case 4:
      ulsch->q_RI[0] = ulsch->o_RI[0];
      ulsch->q_RI[1] = PUSCH_y;//1;
      ulsch->q_RI[2] = PUSCH_x;//ulsch->o_RI[0];
      ulsch->q_RI[3] = PUSCH_x;//1;
      len_RI=4;
      break;
    case 6:
      ulsch->q_RI[0] = ulsch->o_RI[0];
      ulsch->q_RI[1] = PUSCH_y;//1;
      ulsch->q_RI[2] = PUSCH_x;//1;
      ulsch->q_RI[3] = PUSCH_x;//ulsch->o_RI[0];
      ulsch->q_RI[4] = PUSCH_x;//1;
      ulsch->q_RI[5] = PUSCH_x;//1;
      len_RI=6;
      break;
    }
  }
  else if (ulsch->O_RI>1){
    LOG_E(PHY,"RI cannot be more than 1 bit yet\n");
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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    return(-1);
  }
  //  Do ACK coding, Section 5.2.2.6 36.213 (p.23-24 in v8.6)
  wACK_idx = (ulsch->bundling==0) ? 4 : ((Nbundled-1)&3);
#ifdef DEBUG_ULSCH_CODING
  msg("ulsch_coding.c: Bundling %d, Nbundled %d, wACK_idx %d\n",
      ulsch->bundling,Nbundled,wACK_idx);
#endif
  // 1-bit ACK/NAK
  if (ulsch->harq_processes[harq_pid]->O_ACK == 1) {
    switch (Q_m) {
    case 2:
      ulsch->q_ACK[0] = (ulsch->o_ACK[0]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[1] = (ulsch->bundling==0)? PUSCH_y : ((ulsch->o_ACK[0]+wACK[wACK_idx][1])&1);//ulsch->o_ACK[0];
      len_ACK = 2;
      break;
    case 4:
      ulsch->q_ACK[0] = (ulsch->o_ACK[0]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[1] = (ulsch->bundling==0)? PUSCH_y : ((ulsch->o_ACK[0]+wACK[wACK_idx][1])&1);
      ulsch->q_ACK[2] = PUSCH_x;
      ulsch->q_ACK[3] = PUSCH_x;
      len_ACK = 4;
      break;
    case 6:
      ulsch->q_ACK[0] = (ulsch->o_ACK[0]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[1] = (ulsch->bundling==0)? PUSCH_y : ((ulsch->o_ACK[0]+wACK[wACK_idx][1])&1);
      ulsch->q_ACK[2] = PUSCH_x;
      ulsch->q_ACK[3] = PUSCH_x;
      ulsch->q_ACK[4] = PUSCH_x;
      ulsch->q_ACK[6] = PUSCH_x;
      len_ACK = 6;
      break;
    }
  }
  // two-bit ACK/NAK
  if (ulsch->harq_processes[harq_pid]->O_ACK == 2) {
    ack_parity = (ulsch->o_ACK[0]+ulsch->o_ACK[1])&1;
    switch (Q_m) {
    case 2:
      ulsch->q_ACK[0] = (ulsch->o_ACK[0]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[1] = (ulsch->o_ACK[1]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[2] = (ack_parity+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[3] = (ulsch->o_ACK[0]+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[4] = (ulsch->o_ACK[1]+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[5] = (ack_parity+wACK[wACK_idx][1])&1;
      len_ACK = 6;
      break;
    case 4:
      ulsch->q_ACK[0]  = (ulsch->o_ACK[0]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[1]  = (ulsch->o_ACK[1]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[2]  = PUSCH_x;
      ulsch->q_ACK[3]  = PUSCH_x;//1;
      ulsch->q_ACK[4]  = (ack_parity+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[5]  = (ulsch->o_ACK[0]+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[6]  = PUSCH_x;
      ulsch->q_ACK[7]  = PUSCH_x;//1;
      ulsch->q_ACK[8]  = (ulsch->o_ACK[1]+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[9]  = (ack_parity+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[10] = PUSCH_x;
      ulsch->q_ACK[11] = PUSCH_x;//1;
      len_ACK = 12;
      break;
    case 6:
      ulsch->q_ACK[0] = (ulsch->o_ACK[0]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[1] = (ulsch->o_ACK[1]+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[2] = PUSCH_x;
      ulsch->q_ACK[3] = PUSCH_x;
      ulsch->q_ACK[4] = PUSCH_x;
      ulsch->q_ACK[5] = PUSCH_x;

      ulsch->q_ACK[6] = (ack_parity+wACK[wACK_idx][0])&1;
      ulsch->q_ACK[7] = (ulsch->o_ACK[0]+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[8] = PUSCH_x;
      ulsch->q_ACK[9] = PUSCH_x; 
      ulsch->q_ACK[10] = PUSCH_x;
      ulsch->q_ACK[11] = PUSCH_x;

      ulsch->q_ACK[12] = (ulsch->o_ACK[1]+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[13] = (ack_parity+wACK[wACK_idx][1])&1;
      ulsch->q_ACK[14] = PUSCH_x;
      ulsch->q_ACK[15] = PUSCH_x;
      ulsch->q_ACK[16] = PUSCH_x;
      ulsch->q_ACK[17] = PUSCH_x;
      len_ACK = 18;

      break;
    }
  }
  if (ulsch->harq_processes[harq_pid]->O_ACK > 2) {
    LOG_E(PHY,"ACK cannot be more than 2 bits yet\n");
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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    return(-1);
  }


  // channel multiplexing/interleaving

  start_meas(m_stats);
  Hpp = Hprime + Q_RI;
 
  Cmux       = ulsch->Nsymb_pusch;
  Rmux       = Hpp*Q_m/Cmux;
  Rmux_prime = Rmux/Q_m;

  Qprime_RI  = Q_RI / Q_m;
  Qprime_ACK = Q_ACK / Q_m;
  Qprime_CQI = Q_CQI / Q_m;

  //  printf("Qprime_CQI = %d\n",Qprime_CQI);
  // RI BITS 

  memset(y,LTE_NULL,Q_m*Hpp);

  if (frame_parms->Ncp == 0)
    columnset = cs_ri_normal;
  else
    columnset = cs_ri_extended;
  j=0;   
  for (i=0;i<Qprime_RI;i++) {
    r = Rmux_prime - 1 - (i>>2);
    for (q=0;q<Q_m;q++)  {
      y[q+(Q_m*((r*Cmux) + columnset[j]))]  = ulsch->q_RI[(q+(Q_m*i))%len_RI];
      //      printf("ri[%d] %d => y[%d]\n",q+(Q_m*i)%len_RI,ulsch->q_RI[(q+(Q_m*i))%len_RI],q+(Q_m*((r*Cmux) + columnset[j])),y[q+(Q_m*((r*Cmux) + columnset[j]))]);
    }
    j=(j+3)&3;

  }


  // CQI and Data bits
  j=0;
  /*
  for (i=0,iprime=-Qprime_CQI;i<Hprime;i++,iprime++) {

    while (y[Q_m*j] != LTE_NULL) j++;
    
    if (i<Qprime_CQI) {
      for (q=0;q<Q_m;q++) {
	y[q+(Q_m*j)] = ulsch->q[q+(Q_m*i)];
	//printf("cqi[%d] %d => y[%d]\n",q+(Q_m*i),ulsch->q[q+(Q_m*i)],q+(Q_m*j));
      }
    }
    else {
      for (q=0;q<Q_m;q++) {
	y[q+(Q_m*j)] = ulsch->e[q+(Q_m*iprime)];
	//	printf("e[%d] %d => y[%d]\n",q+(Q_m*iprime),ulsch->e[q+(Q_m*iprime)],q+(Q_m*j));
      }
    }
    j++;
  }
  */

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

    while (y[Q_m*j] != LTE_NULL) j++;

    for (q=0;q<Q_m;q++) {
      y[q+(Q_m*j)] = ulsch->q[q+(Q_m*i)];
      //        printf("cqi[%d] %d => y[%d] (j %d)\n",q+(Q_m*i),ulsch->q[q+(Q_m*i)],q+(Q_m*j),j);
    }
  
    j++;
  }

  j2 = j*Q_m;
  switch (Q_m) {

  case 2:

    for (iprime=0;iprime<(Hprime-Qprime_CQI)<<1;iprime+=2) {
      while (y[j2] != LTE_NULL) j2+=2;
      y[j2]   = ulsch->e[iprime];
      y[1+j2] = ulsch->e[1+iprime];
      j2+=2;
    }
    break;

  case 4:
    for (iprime=0;iprime<(Hprime-Qprime_CQI)<<2;iprime+=4) {
      while (y[j2] != LTE_NULL) j2+=4;
      y[j2]   = ulsch->e[iprime];
      y[1+j2] = ulsch->e[1+iprime];
      y[2+j2] = ulsch->e[2+iprime];
      y[3+j2] = ulsch->e[3+iprime];
      j2+=4;
    }    
    break;

  case 6:
    for (iprime=0;iprime<(Hprime-Qprime_CQI)*6;iprime+=6) {
      while (y[j2] != LTE_NULL) j2+=6;
      y[j2]   = ulsch->e[iprime];
      y[1+j2] = ulsch->e[1+iprime];
      y[2+j2] = ulsch->e[2+iprime];
      y[3+j2] = ulsch->e[3+iprime];
      y[4+j2] = ulsch->e[4+iprime];
      y[5+j2] = ulsch->e[5+iprime];
      j2+=6;
    }        
    break;

  }
  // HARQ-ACK Bits (Note these overwrite some bits)

  if (frame_parms->Ncp == 0)
    columnset = cs_ack_normal;
  else
    columnset = cs_ack_extended;

  j=0;
  for (i=0;i<Qprime_ACK;i++) {
    r = Rmux_prime - 1 - (i>>2);
    for (q=0;q<Q_m;q++) {
      y[q+(Q_m*((r*Cmux) + columnset[j]))]  = ulsch->q_ACK[(q+(Q_m*i))%len_ACK];
#ifdef DEBUG_ULSCH_CODING
            msg("ulsch_coding.c: ACK %d => y[%d]=%d (i %d, r*Cmux %d, columnset %d)\n",q+(Q_m*i),
		q+(Q_m*((r*Cmux) + columnset[j])),ulsch->q_ACK[(q+(Q_m*i))%len_ACK],
		i,r*Cmux,columnset[j]);
#endif
    }
    j=(j+3)&3;

  }

  // write out buffer
  j=0;
  switch (Q_m) {
  case 2:
    for (i=0;i<Cmux;i++)
      for (r=0;r<Rmux_prime;r++) {
	yptr=&y[((r*Cmux)+i)<<1];
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
      }
    break;
  case 4:
    for (i=0;i<Cmux;i++)
      for (r=0;r<Rmux_prime;r++) {
	yptr = &y[((r*Cmux)+i)<<2];
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
      }
    break;
  case 6:
    for (i=0;i<Cmux;i++)
      for (r=0;r<Rmux_prime;r++) {
	yptr = &y[((r*Cmux)+i)*6];
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
	ulsch->h[j++] = *yptr++;
      }
    break;
  default:
    break;
  }
  stop_meas(m_stats);

  if (j!=(H+Q_RI)) {
    LOG_E(PHY,"Error in output buffer length (j %d, H+Q_RI %d)\n",j,H+Q_RI); 
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    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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    return(-1);
  }

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  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
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  return(0);
}


#ifdef PHY_ABSTRACTION
#ifdef OPENAIR2
#include "LAYER2/MAC/extern.h"
#include "LAYER2/MAC/defs.h"
#endif
int ulsch_encoding_emul(u8 *ulsch_buffer,
			PHY_VARS_UE *phy_vars_ue,
			u8 eNB_id,
			u8 harq_pid,
			u8 control_only_flag) {

  LTE_UE_ULSCH_t *ulsch = phy_vars_ue->ulsch_ue[eNB_id];
  LTE_UE_DLSCH_t **dlsch = phy_vars_ue->dlsch_ue[eNB_id];
  PHY_MEASUREMENTS *meas = &phy_vars_ue->PHY_measurements;
  u8 tmode = phy_vars_ue->transmission_mode[eNB_id];
  double sinr_eff;  
  u16 rnti=phy_vars_ue->lte_ue_pdcch_vars[eNB_id]->crnti;
  LOG_D(PHY,"EMUL UE ulsch_encoding for eNB %d,mod_id %d, harq_pid %d rnti %x, ACK(%d,%d) \n",
	eNB_id,phy_vars_ue->Mod_id, harq_pid, rnti,ulsch->o_ACK[0],ulsch->o_ACK[1]);

  if (ulsch->O>0) {
    // int flag_LA =0;
   
    sinr_eff = sinr_eff_cqi_calc(phy_vars_ue, eNB_id);
   
    fill_CQI(ulsch->o,ulsch->uci_format,meas,eNB_id,rnti,tmode,sinr_eff);
       //LOG_D(PHY,"UE CQI\n");
    //    print_CQI(ulsch->o,ulsch->uci_format,eNB_id);

    // save PUSCH pmi for later (transmission modes 4,5,6)
    //    msg("ulsch: saving pmi for DL %x\n",pmi2hex_2Ar1(((wideband_cqi_rank1_2A_5MHz *)ulsch->o)->pmi));
    // if (ulsch->uci_format != HLC_subband_cqi_mcs_CBA)
    dlsch[0]->harq_processes[harq_pid]->pmi_alloc = ((wideband_cqi_rank1_2A_5MHz *)ulsch->o)->pmi;
  }

  memcpy(phy_vars_ue->ulsch_ue[eNB_id]->harq_processes[harq_pid]->b,
	 ulsch_buffer,
	 phy_vars_ue->ulsch_ue[eNB_id]->harq_processes[harq_pid]->TBS>>3);

     
  //memcpy(&UE_transport_info[phy_vars_ue->Mod_id].transport_blocks[UE_transport_info_TB_index[phy_vars_ue->Mod_id]],
  memcpy(&UE_transport_info[phy_vars_ue->Mod_id].transport_blocks,
	 ulsch_buffer,
	 phy_vars_ue->ulsch_ue[eNB_id]->harq_processes[harq_pid]->TBS>>3);  
  //UE_transport_info_TB_index[phy_vars_ue->Mod_id]+=phy_vars_ue->ulsch_ue[eNB_id]->harq_processes[harq_pid]->TBS>>3;
  // navid: currently more than one eNB is not supported in the code 
  UE_transport_info[phy_vars_ue->Mod_id].num_eNB = 1; 
  UE_transport_info[phy_vars_ue->Mod_id].rnti[0] = phy_vars_ue->lte_ue_pdcch_vars[0]->crnti; 
  UE_transport_info[phy_vars_ue->Mod_id].eNB_id[0]  = eNB_id;
  UE_transport_info[phy_vars_ue->Mod_id].harq_pid[0] = harq_pid;
  UE_transport_info[phy_vars_ue->Mod_id].tbs[0]     = phy_vars_ue->ulsch_ue[eNB_id]->harq_processes[harq_pid]->TBS>>3 ;
  // msg("\nphy_vars_ue->Mod_id%d\n",phy_vars_ue->Mod_id);
  
  UE_transport_info[phy_vars_ue->Mod_id].cntl.pusch_flag = 1;
  //UE_transport_info[phy_vars_ue->Mod_id].cntl.pusch_uci = *(u32 *)ulsch->o;
  memcpy(UE_transport_info[phy_vars_ue->Mod_id].cntl.pusch_uci,
	 ulsch->o,
	 MAX_CQI_BYTES); 
  // msg("[UE]cqi is %d \n", ((HLC_subband_cqi_rank1_2A_5MHz *)ulsch->o)->cqi1);
  
  UE_transport_info[phy_vars_ue->Mod_id].cntl.length_uci = ulsch->O;
  UE_transport_info[phy_vars_ue->Mod_id].cntl.uci_format = ulsch->uci_format;
  UE_transport_info[phy_vars_ue->Mod_id].cntl.pusch_ri = (ulsch->o_RI[0]&1)+((ulsch->o_RI[1]&1)<<1);
  UE_transport_info[phy_vars_ue->Mod_id].cntl.pusch_ack =   (ulsch->o_ACK[0]&1) + ((ulsch->o_ACK[1]&1)<<1);
  //msg("ack is %d %d %d\n",UE_transport_info[phy_vars_ue->Mod_id].cntl.pusch_ack, (ulsch->o_ACK[1]&1)<<1, ulsch->o_ACK[0]&1);
  return(0);
  
}
#endif