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openairinterface5g/openair1/PHY/LTE_TRANSPORT/dlsch_modulation.c
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/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
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.
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.
You should have received a copy of the GNU General Public License
along with OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
/*! \file PHY/LTE_TRANSPORT/dlsch_modulation.c
* \brief Top-level routines for generating the PDSCH physical channel from 36-211, V8.6 2009-03
* \author R. Knopp, F. Kaltenberger
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr,florian.kaltenberger@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 "UTIL/LOG/vcd_signal_dumper.h"
//#define DEBUG_DLSCH_MODULATION
//#define is_not_pilot(pilots,re,nushift,use2ndpilots) ((pilots==0) || ((re!=nushift) && (re!=nushift+6)&&((re!=nushift+3)||(use2ndpilots==1))&&((re!=nushift+9)||(use2ndpilots==1)))?1:0)
uint8_t is_not_pilot(uint8_t pilots, uint8_t re, uint8_t nushift, uint8_t use2ndpilots)
{
uint8_t offset = (pilots==2)?3:0;
int nushiftmod3 = nushift%3;
if (pilots==0)
return(1);
if (use2ndpilots==1) { // This is for SISO (mode 1)
if ((re!=nushift+offset) && (re!=((nushift+6+offset)%12)))
return(1);
} else { // 2 antenna pilots
if ((re!=nushiftmod3) && (re!=nushiftmod3+6) && (re!=nushiftmod3+3) && (re!=nushiftmod3+9))
return(1);
}
return(0);
}
uint8_t is_not_UEspecRS(int first_layer,int re)
{
return(1);
}
void generate_64qam_table(void)
{
int a,b,c,index;
for (a=-1; a<=1; a+=2)
for (b=-1; b<=1; b+=2)
for (c=-1; c<=1; c+=2) {
index = (1+a)*2 + (1+b) + (1+c)/2;
qam64_table[index] = -a*(QAM64_n1 + b*(QAM64_n2 + (c*QAM64_n3))); // 0 1 2
}
}
void generate_16qam_table(void)
{
int a,b,index;
for (a=-1; a<=1; a+=2)
for (b=-1; b<=1; b+=2) {
index = (1+a) + (1+b)/2;
qam16_table[index] = -a*(QAM16_n1 + (b*QAM16_n2));
}
}
void layer1prec2A(int32_t *antenna0_sample, int32_t *antenna1_sample, uint8_t precoding_index)
{
switch (precoding_index) {
case 0: // 1 1
*antenna1_sample=*antenna0_sample;
break;
case 1: // 1 -1
((int16_t *)antenna1_sample)[0] = -((int16_t *)antenna0_sample)[0];
((int16_t *)antenna1_sample)[1] = -((int16_t *)antenna0_sample)[1];
break;
case 2: // 1 j
((int16_t *)antenna1_sample)[0] = -((int16_t *)antenna0_sample)[1];
((int16_t *)antenna1_sample)[1] = ((int16_t *)antenna0_sample)[0];
break;
case 3: // 1 -j
((int16_t *)antenna1_sample)[0] = ((int16_t *)antenna0_sample)[1];
((int16_t *)antenna1_sample)[1] = -((int16_t *)antenna0_sample)[0];
break;
}
// normalize
/* ((int16_t *)antenna0_sample)[0] = (int16_t)((((int16_t *)antenna0_sample)[0]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t *)antenna0_sample)[1] = (int16_t)((((int16_t *)antenna0_sample)[1]*ONE_OVER_SQRT2_Q15)>>15); ((int16_t *)antenna1_sample)[0] = (int16_t)((((int16_t *)antenna1_sample)[0]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t *)antenna1_sample)[1] = (int16_t)((((int16_t *)antenna1_sample)[1]*ONE_OVER_SQRT2_Q15)>>15); */
}
int allocate_REs_in_RB(LTE_DL_FRAME_PARMS *frame_parms,
mod_sym_t **txdataF,
uint32_t *jj,
uint32_t *jj2,
uint16_t re_offset,
uint32_t symbol_offset,
LTE_DL_eNB_HARQ_t *dlsch0_harq,
LTE_DL_eNB_HARQ_t *dlsch1_harq,
uint8_t pilots,
int16_t amp,
uint8_t precoder_index,
int16_t *qam_table_s0,
int16_t *qam_table_s1,
uint32_t *re_allocated,
uint8_t skip_dc,
uint8_t skip_half)
{
uint8_t *x0 = dlsch0_harq->e;
MIMO_mode_t mimo_mode = dlsch0_harq->mimo_mode;
int first_layer0 = dlsch0_harq->first_layer;
int Nlayers0 = dlsch0_harq->Nlayers;
uint8_t mod_order0 = get_Qm(dlsch0_harq->mcs);
uint8_t *x1=NULL;
uint8_t mod_order1=2;
// Fill these in later for TM8-10
// int Nlayers1;
// int first_layer1;
int use2ndpilots = (frame_parms->mode1_flag==1)?1:0;
uint32_t tti_offset,aa;
uint8_t re;
uint8_t qam64_table_offset_re = 0;
uint8_t qam64_table_offset_im = 0;
uint8_t qam16_table_offset_re = 0;
uint8_t qam16_table_offset_im = 0;
uint8_t qam64_table_offset_re0 = 0;
uint8_t qam64_table_offset_im0 = 0;
uint8_t qam16_table_offset_re0 = 0;
uint8_t qam16_table_offset_im0 = 0;
uint8_t qam64_table_offset_re1 = 0;
uint8_t qam64_table_offset_im1 = 0;
uint8_t qam16_table_offset_re1 = 0;
uint8_t qam16_table_offset_im1 = 0;
int16_t xx0_re,xx1_re;
int16_t xx0_im,xx1_im;
int16_t gain_lin_QPSK;//,gain_lin_16QAM1,gain_lin_16QAM2;
int16_t re_off=re_offset;
uint8_t first_re,last_re;
int32_t tmp_sample1,tmp_sample2;
int16_t tmp_amp=amp;
int s=1;
gain_lin_QPSK = (int16_t)((amp*ONE_OVER_SQRT2_Q15)>>15);
// if (mimo_mode == LARGE_CDD) gain_lin_QPSK>>=1;
if (dlsch1_harq) {
x1 = dlsch1_harq->e;
// Fill these in later for TM8-10
// Nlayers1 = dlsch1_harq->Nlayers;
// first_layer1 = dlsch1_harq->first_layer;
mod_order1 = get_Qm(dlsch1_harq->mcs);
}
/*
switch (mod_order) {
case 2:
// QPSK single stream
break;
case 4:
//16QAM Single stream
gain_lin_16QAM1 = (int16_t)(((int32_t)amp*QAM16_n1)>>15);
gain_lin_16QAM2 = (int16_t)(((int32_t)amp*QAM16_n2)>>15);
break;
case 6:
//64QAM Single stream
break;
default:
break;
}
*/
#ifdef DEBUG_DLSCH_MODULATION
printf("allocate_re (mod %d): symbol_offset %d re_offset %d (%d,%d), jj %d -> %d,%d\n",mod_order0,symbol_offset,re_offset,skip_dc,skip_half,*jj, x0[*jj], x0[1+*jj]);
#endif
first_re=0;
last_re=12;
if (skip_half==1)
last_re=6;
else if (skip_half==2)
first_re=6;
for (re=first_re; re<last_re; re++) {
if ((skip_dc == 1) && (re==6))
re_off=re_off - frame_parms->ofdm_symbol_size+1;
tti_offset = symbol_offset + re_off + re;
// check that RE is not from Cell-specific RS
if (is_not_pilot(pilots,re,frame_parms->nushift,use2ndpilots)==1) {
// printf("re %d (jj %d)\n",re,*jj);
if (mimo_mode == SISO) { //SISO mapping
*re_allocated = *re_allocated + 1;
switch (mod_order0) {
case 2: //QPSK
// printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t*)&txdataF[aa][tti_offset])[0] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i
}
*jj = *jj + 1;
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t*)&txdataF[aa][tti_offset])[1] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //Q //b_{i+1}
}
*jj = *jj + 1;
// printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
break;
case 4: //16QAM
qam16_table_offset_re = 0;
qam16_table_offset_im = 0;
if (x0[*jj] == 1)
qam16_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=1;
*jj=*jj+1;
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s0[qam16_table_offset_re];
((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s0[qam16_table_offset_im];
// ((int16_t *)&txdataF[aa][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
// ((int16_t *)&txdataF[aa][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
}
break;
case 6: //64QAM
qam64_table_offset_re = 0;
qam64_table_offset_im = 0;
if (x0[*jj] == 1)
qam64_table_offset_re+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=1;
*jj=*jj+1;
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s0[qam64_table_offset_re];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s0[qam64_table_offset_im];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
}
break;
}
}
else if (mimo_mode == ALAMOUTI) {
*re_allocated = *re_allocated + 1;
// normalization for 2 tx antennas
amp = (int16_t)(((int32_t)tmp_amp*ONE_OVER_SQRT2_Q15)>>15);
switch (mod_order0) {
case 2: //QPSK
// first antenna position n -> x0
((int16_t*)&tmp_sample1)[0] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj=*jj+1;
((int16_t*)&tmp_sample1)[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj=*jj+1;
// second antenna position n -> -x1*
((int16_t*)&tmp_sample2)[0] = (x0[*jj]==1) ? (gain_lin_QPSK) : -gain_lin_QPSK;
*jj=*jj+1;
((int16_t*)&tmp_sample2)[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj=*jj+1;
// normalization for 2 tx antennas
((int16_t*)&txdataF[0][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample1)[0]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t*)&txdataF[0][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample1)[1]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t*)&txdataF[1][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample2)[0]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t*)&txdataF[1][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample2)[1]*ONE_OVER_SQRT2_Q15)>>15);
break;
case 4: //16QAM
// Antenna 0 position n
qam16_table_offset_re = 0;
qam16_table_offset_im = 0;
if (x0[*jj] == 1)
qam16_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=1;
*jj=*jj+1;
((int16_t *)&txdataF[0][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
((int16_t *)&txdataF[0][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
// Antenna 1 position n Real part -> -x1*
qam16_table_offset_re = 0;
qam16_table_offset_im = 0;
if (x0[*jj] == 1)
qam16_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=1;
*jj=*jj+1;
((int16_t *)&txdataF[1][tti_offset])[0]+=-(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
((int16_t *)&txdataF[1][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
break;
case 6: // 64-QAM
// Antenna 0
qam64_table_offset_re = 0;
qam64_table_offset_im = 0;
if (x0[*jj] == 1)
qam64_table_offset_re+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=1;
*jj=*jj+1;
((int16_t *)&txdataF[0][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
((int16_t *)&txdataF[0][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
// Antenna 1 => -x1*
qam64_table_offset_re = 0;
qam64_table_offset_im = 0;
if (x0[*jj] == 1)
qam64_table_offset_re+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=1;
*jj=*jj+1;
((int16_t *)&txdataF[1][tti_offset])[0]+=-(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
((int16_t *)&txdataF[1][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
break;
}
// fill in the rest of the ALAMOUTI precoding
if (is_not_pilot(pilots,re + 1,frame_parms->nushift,use2ndpilots)==1) {
((int16_t *)&txdataF[0][tti_offset+1])[0] += -((int16_t *)&txdataF[1][tti_offset])[0]; //x1
((int16_t *)&txdataF[0][tti_offset+1])[1] += ((int16_t *)&txdataF[1][tti_offset])[1];
((int16_t *)&txdataF[1][tti_offset+1])[0] += ((int16_t *)&txdataF[0][tti_offset])[0]; //x0*
((int16_t *)&txdataF[1][tti_offset+1])[1] += -((int16_t *)&txdataF[0][tti_offset])[1];
} else {
((int16_t *)&txdataF[0][tti_offset+2])[0] += -((int16_t *)&txdataF[1][tti_offset])[0]; //x1
((int16_t *)&txdataF[0][tti_offset+2])[1] += ((int16_t *)&txdataF[1][tti_offset])[1];
((int16_t *)&txdataF[1][tti_offset+2])[0] += ((int16_t *)&txdataF[0][tti_offset])[0]; //x0*
((int16_t *)&txdataF[1][tti_offset+2])[1] += -((int16_t *)&txdataF[0][tti_offset])[1];
}
} else if (mimo_mode == LARGE_CDD) {
*re_allocated = *re_allocated + 1;
if (frame_parms->nb_antennas_tx == 2) {
switch (mod_order0) {
default:
LOG_E(PHY,"Unknown mod_order0 %d\n",mod_order0);
xx0_re=xx0_im=0;
break;
case 2: //QPSK
// printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
xx0_re = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj = *jj + 1;
xx0_im = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj = *jj + 1;
// printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
break;
case 4: //16QAM
qam16_table_offset_re0 = 0;
qam16_table_offset_im0 = 0;
if (x0[*jj] == 1)
qam16_table_offset_re0+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im0+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_re0+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im0+=1;
*jj=*jj+1;
xx0_re = qam_table_s0[qam16_table_offset_re0];
xx0_im = qam_table_s0[qam16_table_offset_im0];
break;
case 6: //64QAM
qam64_table_offset_re0 = 0;
qam64_table_offset_im0 = 0;
if (x0[*jj] == 1)
qam64_table_offset_re0+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im0+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re0+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im0+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re0+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im0+=1;
*jj=*jj+1;
xx0_re = qam_table_s0[qam64_table_offset_re0];
xx0_im = qam_table_s0[qam64_table_offset_im0];
break;
}
switch (mod_order1) {
default:
LOG_E(PHY,"Unknown mod_order1 %d\n",mod_order1);
xx1_re=xx1_im=0;
break;
case 2: //QPSK
// printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
xx1_re = (x1[*jj2]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj2 = *jj2 + 1;
xx1_im = (x1[*jj2]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj2 = *jj2 + 1;
// printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
break;
case 4: //16QAM
qam16_table_offset_re1 = 0;
qam16_table_offset_im1 = 0;
if (x1[*jj2] == 1)
qam16_table_offset_re1+=2;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam16_table_offset_im1+=2;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam16_table_offset_re1+=1;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam16_table_offset_im1+=1;
*jj2 = *jj2 + 1;
xx1_re = qam_table_s1[qam16_table_offset_re1];
xx1_im = qam_table_s1[qam16_table_offset_im1];
break;
case 6: //64QAM
qam64_table_offset_re1 = 0;
qam64_table_offset_im1 = 0;
if (x1[*jj2] == 1)
qam64_table_offset_re1+=4;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam64_table_offset_im1+=4;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam64_table_offset_re1+=2;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam64_table_offset_im1+=2;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam64_table_offset_re1+=1;
*jj2 = *jj2 + 1;
if (x1[*jj2] == 1)
qam64_table_offset_im1+=1;
*jj2 = *jj2 + 1;
xx1_re = qam_table_s1[qam64_table_offset_re1];
xx1_im = qam_table_s1[qam64_table_offset_im1];
break;
}
// This implements the Large CDD precoding for 2 TX antennas
// - - - - - - - - - - - -
//| y0 | | 1 0 || 1 0 || 1 1 || x0 | | x0 + x1 |
//| y1 | = .5 | 0 1 || 0 (-1)^i || 1 -1 || x1 | = .5| (-1)^i(x0 - x1)|
// - - - - - - - - - - -
// Note: Factor .5 is accounted for in amplitude when calling this function
((int16_t *)&txdataF[0][tti_offset])[0]+=((xx0_re+xx1_re)>>1);
((int16_t *)&txdataF[1][tti_offset])[0]+=(s*((xx0_re-xx1_re)>>1));
((int16_t *)&txdataF[0][tti_offset])[1]+=((xx0_im+xx1_im)>>1);
((int16_t *)&txdataF[1][tti_offset])[1]+=(s*((xx0_im-xx1_im)>>1));
/*
printf("CDD: xx0 (%d,%d), xx1(%d,%d), s(%d), txF[0] (%d,%d), txF[1] (%d,%d)\n",
xx0_re,xx0_im,xx1_re,xx1_im, s, ((int16_t *)&txdataF[0][tti_offset])[0],((int16_t *)&txdataF[0][tti_offset])[1],
((int16_t *)&txdataF[1][tti_offset])[0],((int16_t *)&txdataF[1][tti_offset])[1]);
*/
// s alternates +1/-1 for each RE
s = -s;
}
} else if ((mimo_mode >= UNIFORM_PRECODING11)&&(mimo_mode <= PUSCH_PRECODING1)) {
// this is for transmission modes 4-6 (1 layer)
*re_allocated = *re_allocated + 1;
amp = (int16_t)(((int32_t)tmp_amp*ONE_OVER_SQRT2_Q15)>>15);
switch (mod_order0) {
case 2: //QPSK
((int16_t*)&tmp_sample1)[0] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj = *jj + 1;
((int16_t*)&tmp_sample1)[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK;
*jj = *jj + 1;
// normalization for 2 tx antennas
((int16_t*)&txdataF[0][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample1)[0]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t*)&txdataF[0][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample1)[1]*ONE_OVER_SQRT2_Q15)>>15);
if (frame_parms->nb_antennas_tx == 2) {
layer1prec2A(&tmp_sample1,&tmp_sample2,precoder_index);
((int16_t*)&txdataF[1][tti_offset])[0] += (int16_t)((((int16_t*)&tmp_sample2)[0]*ONE_OVER_SQRT2_Q15)>>15);
((int16_t*)&txdataF[1][tti_offset])[1] += (int16_t)((((int16_t*)&tmp_sample2)[1]*ONE_OVER_SQRT2_Q15)>>15);
}
break;
case 4: //16QAM
qam16_table_offset_re = 0;
qam16_table_offset_im = 0;
if (x0[*jj] == 1)
qam16_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=1;
*jj=*jj+1;
((int16_t*)&tmp_sample1)[0] = (int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
((int16_t*)&tmp_sample1)[1] = (int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
((int16_t *)&txdataF[0][tti_offset])[0] += ((int16_t*)&tmp_sample1)[0];
((int16_t *)&txdataF[0][tti_offset])[1] += ((int16_t*)&tmp_sample1)[1];
if (frame_parms->nb_antennas_tx == 2) {
layer1prec2A(&tmp_sample1,&tmp_sample2,precoder_index);
((int16_t*)&txdataF[1][tti_offset])[0] += ((int16_t*)&tmp_sample2)[0];
((int16_t*)&txdataF[1][tti_offset])[1] += ((int16_t*)&tmp_sample2)[1];
}
break;
case 6: //64QAM
qam64_table_offset_re = 0;
qam64_table_offset_im = 0;
if (x0[*jj] == 1)
qam64_table_offset_re+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=1;
*jj=*jj+1;
((int16_t*)&tmp_sample1)[0] = (int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
((int16_t*)&tmp_sample1)[1] = (int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
((int16_t *)&txdataF[0][tti_offset])[0] += ((int16_t*)&tmp_sample1)[0];
((int16_t *)&txdataF[0][tti_offset])[1] += ((int16_t*)&tmp_sample1)[1];
if (frame_parms->nb_antennas_tx == 2) {
layer1prec2A(&tmp_sample1,&tmp_sample2,precoder_index);
((int16_t*)&txdataF[1][tti_offset])[0] += ((int16_t*)&tmp_sample2)[0];
((int16_t*)&txdataF[1][tti_offset])[1] += ((int16_t*)&tmp_sample2)[1];
}
break;
}
}
if (mimo_mode == ALAMOUTI) {
re++; // adjacent carriers are taken care of by precoding
*re_allocated = *re_allocated + 1;
if (is_not_pilot(pilots,re,frame_parms->nushift,use2ndpilots)==0) {
re++;
*re_allocated = *re_allocated + 1;
}
}
if (mimo_mode >= TM8) { //TM8,TM9,TM10
if (is_not_UEspecRS(first_layer0,re)) {
switch (mod_order0) {
case 2: //QPSK
// printf("%d : %d,%d => ",tti_offset,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
for (int layer=first_layer0; layer<=(first_layer0+Nlayers0); layer++) {
((int16_t*)&txdataF[layer][tti_offset])[0] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i
*jj = *jj + 1;
((int16_t*)&txdataF[layer][tti_offset])[1] = (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //Q //b_{i+1}
*jj = *jj + 1;
}
break;
case 4: //16QAM
if (is_not_UEspecRS(0/*layer (FIXME uninitialized!)*/,re)) {
qam16_table_offset_re = 0;
qam16_table_offset_im = 0;
if (x0[*jj] == 1)
qam16_table_offset_re+=2;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam16_table_offset_im+=2;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam16_table_offset_re+=1;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam16_table_offset_im+=1;
*jj = *jj + 1;
for (int layer=first_layer0; layer<=(first_layer0+Nlayers0); layer++) {
((int16_t*)&txdataF[layer][tti_offset])[0] = qam_table_s0[qam16_table_offset_re];
((int16_t*)&txdataF[layer][tti_offset])[1] = qam_table_s0[qam16_table_offset_im];
}
}
break;
case 6: //64QAM
qam64_table_offset_re = 0;
qam64_table_offset_im = 0;
if (x0[*jj] == 1)
qam64_table_offset_re+=4;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam64_table_offset_im+=4;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam64_table_offset_re+=2;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam64_table_offset_im+=2;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam64_table_offset_re+=1;
*jj = *jj + 1;
if (x0[*jj] == 1)
qam64_table_offset_im+=1;
*jj = *jj + 1;
for (int layer=first_layer0; layer<=(first_layer0+Nlayers0); layer++) {
((int16_t*)&txdataF[layer][tti_offset])[0] = qam_table_s0[qam64_table_offset_re];
((int16_t*)&txdataF[layer][tti_offset])[1] = qam_table_s0[qam64_table_offset_im];
}
break;
}
}
} else if (mimo_mode>=TM9_10) {
msg("allocate_REs_in_RB() [dlsch.c] : ERROR, unknown mimo_mode %d\n",mimo_mode);
return(-1);
}
}
}
return(0);
}
int allocate_REs_in_RB_MCH(mod_sym_t **txdataF,
uint32_t *jj,
uint16_t re_offset,
uint32_t symbol_offset,
uint8_t *x0,
uint8_t l,
uint8_t mod_order,
int16_t amp,
int16_t *qam_table_s,
uint32_t *re_allocated,
uint8_t skip_dc,
LTE_DL_FRAME_PARMS *frame_parms)
{
uint32_t tti_offset,aa;
uint8_t re;
uint8_t qam64_table_offset_re = 0;
uint8_t qam64_table_offset_im = 0;
uint8_t qam16_table_offset_re = 0;
uint8_t qam16_table_offset_im = 0;
int16_t gain_lin_QPSK;//,gain_lin_16QAM1,gain_lin_16QAM2;
int16_t re_off=re_offset;
gain_lin_QPSK = (int16_t)((amp*ONE_OVER_SQRT2_Q15)>>15);
uint8_t first_re,last_re;
int inc;
#ifdef DEBUG_DLSCH_MODULATION
printf("allocate_re_MCH (mod %d): symbol_offset %d re_offset %d (%d), jj %d -> %d,%d, gain_lin_QPSK %d,txdataF %p\n",mod_order,symbol_offset,re_offset,skip_dc,*jj, x0[*jj], x0[1+*jj],gain_lin_QPSK,&txdataF[0][symbol_offset]);
#endif
last_re=12;
first_re=0;
inc=1;
if ((l==2)||(l==10)) {
inc=2;
first_re=1;
} else if (l==6) {
inc=2;
}
for (re=first_re; re<last_re; re+=inc) {
if ((skip_dc == 1) && (re==(6+first_re)))
re_off=re_off - frame_parms->ofdm_symbol_size+1;
tti_offset = symbol_offset + re_off + re;
// printf("re %d (jj %d)\n",re,*jj);
*re_allocated = *re_allocated + 1;
switch (mod_order) {
case 2: //QPSK
// printf("%d : %d,%d => ",tti_offset,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++)
((int16_t*)&txdataF[aa][tti_offset])[0] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i
*jj = *jj + 1;
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++)
((int16_t*)&txdataF[aa][tti_offset])[1] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //Q //b_{i+1}
*jj = *jj + 1;
// printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
break;
case 4: //16QAM
qam16_table_offset_re = 0;
qam16_table_offset_im = 0;
if (x0[*jj] == 1)
qam16_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam16_table_offset_im+=1;
*jj=*jj+1;
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s[qam16_table_offset_re];
((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s[qam16_table_offset_im];
// ((int16_t *)&txdataF[aa][tti_offset])[0]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_re])>>15);
// ((int16_t *)&txdataF[aa][tti_offset])[1]+=(int16_t)(((int32_t)amp*qam16_table[qam16_table_offset_im])>>15);
}
break;
case 6: //64QAM
qam64_table_offset_re = 0;
qam64_table_offset_im = 0;
if (x0[*jj] == 1)
qam64_table_offset_re+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=4;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=2;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_re+=1;
*jj=*jj+1;
if (x0[*jj] == 1)
qam64_table_offset_im+=1;
*jj=*jj+1;
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t *)&txdataF[aa][tti_offset])[0]+=qam_table_s[qam64_table_offset_re];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_re])>>15);
((int16_t *)&txdataF[aa][tti_offset])[1]+=qam_table_s[qam64_table_offset_im];//(int16_t)(((int32_t)amp*qam64_table[qam64_table_offset_im])>>15);
}
break;
}
}
return(0);
}
uint8_t get_pmi(uint8_t N_RB_DL,LTE_DL_eNB_HARQ_t *dlsch_harq,uint16_t rb)
{
MIMO_mode_t mode = dlsch_harq->mimo_mode;
uint32_t pmi_alloc = dlsch_harq->pmi_alloc;
// printf("Getting pmi for RB %d => %d\n",rb,(pmi_alloc>>((rb>>2)<<1))&3);
switch (N_RB_DL) {
case 6: // 1 PRB per subband
if (mode <= PUSCH_PRECODING1)
return((pmi_alloc>>(rb<<1))&3);
else
return((pmi_alloc>>rb)&1);
break;
default:
case 25: // 4 PRBs per subband
if (mode <= PUSCH_PRECODING1)
return((pmi_alloc>>((rb>>2)<<1))&3);
else
return((pmi_alloc>>(rb>>2))&1);
break;
case 50: // 6 PRBs per subband
if (mode <= PUSCH_PRECODING1)
return((pmi_alloc>>((rb/6)<<1))&3);
else
return((pmi_alloc>>(rb/6))&1);
break;
case 100: // 8 PRBs per subband
if (mode <= PUSCH_PRECODING1)
return((pmi_alloc>>((rb>>3)<<1))&3);
else
return((pmi_alloc>>(rb>>3))&1);
break;
}
}
int dlsch_modulation(mod_sym_t **txdataF,
int16_t amp,
uint32_t subframe_offset,
LTE_DL_FRAME_PARMS *frame_parms,
uint8_t num_pdcch_symbols,
LTE_eNB_DLSCH_t *dlsch0,
LTE_eNB_DLSCH_t *dlsch1)
{
uint8_t nsymb;
uint8_t harq_pid = dlsch0->current_harq_pid;
LTE_DL_eNB_HARQ_t *dlsch0_harq = dlsch0->harq_processes[harq_pid];
LTE_DL_eNB_HARQ_t *dlsch1_harq; //= dlsch1->harq_processes[harq_pid];
uint32_t i,jj,jj2,re_allocated,symbol_offset;
uint16_t l,rb,re_offset;
uint32_t rb_alloc_ind;
uint32_t *rb_alloc = dlsch0_harq->rb_alloc;
uint8_t pilots=0;
uint8_t skip_dc,skip_half;
uint8_t mod_order0 = get_Qm(dlsch0_harq->mcs);
uint8_t mod_order1 = 0;
int16_t amp_rho_a, amp_rho_b;
int16_t qam16_table_a0[4],qam64_table_a0[8],qam16_table_b0[4],qam64_table_b0[8];
int16_t qam16_table_a1[4],qam64_table_a1[8],qam16_table_b1[4],qam64_table_b1[8];
int16_t *qam_table_s0,*qam_table_s1;
#ifdef DEBUG_DLSCH_MODULATION
uint8_t Nl0 = dlsch0_harq->Nl;
uint8_t Nl1;
#endif
if (dlsch1) {
dlsch1_harq = dlsch1->harq_processes[harq_pid];
mod_order1 = get_Qm(dlsch1_harq->mcs);
#ifdef DEBUG_DLSCH_MODULATION
Nl1 = dlsch1_harq->Nl;
#endif
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_MODULATION, VCD_FUNCTION_IN);
nsymb = (frame_parms->Ncp==0) ? 14:12;
amp_rho_a = (int16_t)(((int32_t)amp*dlsch0->sqrt_rho_a)>>13);
amp_rho_b = (int16_t)(((int32_t)amp*dlsch0->sqrt_rho_b)>>13);
if (mod_order0 == 4)
for (i=0; i<4; i++) {
qam16_table_a0[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_a)>>15);
qam16_table_b0[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_b)>>15);
}
else if (mod_order0 == 6)
for (i=0; i<8; i++) {
qam64_table_a0[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_a)>>15);
qam64_table_b0[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_b)>>15);
}
if (mod_order1 == 4)
for (i=0; i<4; i++) {
qam16_table_a1[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_a)>>15);
qam16_table_b1[i] = (int16_t)(((int32_t)qam16_table[i]*amp_rho_b)>>15);
}
else if (mod_order1 == 6)
for (i=0; i<8; i++) {
qam64_table_a1[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_a)>>15);
qam64_table_b1[i] = (int16_t)(((int32_t)qam64_table[i]*amp_rho_b)>>15);
}
//Modulation mapping (difference w.r.t. LTE specs)
jj=0;
jj2=0;
re_allocated=0;
// printf("num_pdcch_symbols %d, nsymb %d\n",num_pdcch_symbols,nsymb);
for (l=num_pdcch_symbols; l<nsymb; l++) {
#ifdef DEBUG_DLSCH_MODULATION
msg("Generating DLSCH (harq_pid %d,mimo %d, pmi_alloc0 %llx, mod0 %d, mod1 %d, rb_alloc[0] %d) in %d\n",
harq_pid,
dlsch0_harq->mimo_mode,
pmi2hex_2Ar1(dlsch0_harq->pmi_alloc),
mod_order0,
mod_order1,
rb_alloc[0],
l);
#endif
if (frame_parms->Ncp==0) { // normal prefix
if ((l==4)||(l==11))
pilots=2; // pilots in nushift+3, nushift+9
else if (l==7)
pilots=1; // pilots in nushift, nushift+6
else
pilots=0;
} else {
if ((l==3)||(l==9))
pilots=2;
else if (l==6)
pilots=1;
else
pilots=0;
}
re_offset = frame_parms->first_carrier_offset;
symbol_offset = (uint32_t)frame_parms->ofdm_symbol_size*(l+(subframe_offset*nsymb));
//for (aa=0;aa<frame_parms->nb_antennas_tx;aa++)
// memset(&txdataF[aa][symbol_offset],0,frame_parms->ofdm_symbol_size<<2);
//printf("symbol_offset %d,subframe offset %d : pilots %d\n",symbol_offset,subframe_offset,pilots);
for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
if (rb < 32)
rb_alloc_ind = (rb_alloc[0]>>rb) & 1;
else if (rb < 64)
rb_alloc_ind = (rb_alloc[1]>>(rb-32)) & 1;
else if (rb < 96)
rb_alloc_ind = (rb_alloc[2]>>(rb-64)) & 1;
else if (rb < 100)
rb_alloc_ind = (rb_alloc[3]>>(rb-96)) & 1;
else
rb_alloc_ind = 0;
// check for PBCH
skip_half=0;
if ((frame_parms->N_RB_DL&1) == 1) { // ODD N_RB_DL
if (rb==(frame_parms->N_RB_DL>>1))
skip_dc = 1;
else
skip_dc = 0;
// PBCH
if ((subframe_offset==0) &&
(rb>((frame_parms->N_RB_DL>>1)-3)) &&
(rb<((frame_parms->N_RB_DL>>1)+3)) &&
(l>=(nsymb>>1)) &&
(l<((nsymb>>1) + 4))) {
rb_alloc_ind = 0;
}
//PBCH subframe 0, symbols nsymb>>1 ... nsymb>>1 + 3
if ((subframe_offset==0) &&
(rb==((frame_parms->N_RB_DL>>1)-3)) &&
(l>=(nsymb>>1)) &&
(l<((nsymb>>1) + 4)))
skip_half=1;
else if ((subframe_offset==0) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l>=(nsymb>>1)) && (l<((nsymb>>1) + 4)))
skip_half=2;
if (frame_parms->frame_type == TDD) { // TDD
//SSS TDD
if (((subframe_offset==0)||(subframe_offset==5)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==(nsymb-1)) ) {
rb_alloc_ind = 0;
}
//SSS TDD
if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==(nsymb-1)))
skip_half=1;
else if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==(nsymb-1)))
skip_half=2;
//PSS TDD
if (((subframe_offset==1) || (subframe_offset==6)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==2) ) {
rb_alloc_ind = 0;
}
//PSS TDD
if (((subframe_offset==1)||(subframe_offset==6)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==2))
skip_half=1;
else if (((subframe_offset==1)||(subframe_offset==6)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==2))
skip_half=2;
} else {
//PSS FDD
if (((subframe_offset==0)||(subframe_offset==5)) &&
(rb>((frame_parms->N_RB_DL>>1)-3)) &&
(rb<((frame_parms->N_RB_DL>>1)+3)) &&
(l==((nsymb>>1)-1)) ) {
rb_alloc_ind = 0;
}
//PSS FDD
if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && (l==((nsymb>>1)-1)))
skip_half=1;
else if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && (l==(((nsymb>>1)-1))))
skip_half=2;
//SSS FDD
if (((subframe_offset==0)||(subframe_offset==5)) && (rb>((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==((nsymb>>1)-2)) ) {
rb_alloc_ind = 0;
}
//SSS FDD
if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)-3)) && ((l==((nsymb>>1)-2))))
skip_half=1;
else if (((subframe_offset==0)||(subframe_offset==5)) && (rb==((frame_parms->N_RB_DL>>1)+3)) && ((l==(nsymb>>1)-2)))
skip_half=2;
}
} else { // EVEN N_RB_DL
//PBCH
if ((subframe_offset==0) &&
(rb>=((frame_parms->N_RB_DL>>1)-3)) &&
(rb<((frame_parms->N_RB_DL>>1)+3)) &&
(l>=nsymb>>1) && (l<((nsymb>>1) + 4)))
rb_alloc_ind = 0;
skip_dc=0;
skip_half=0;
if (frame_parms->frame_type == TDD) { // TDD
//SSS
if (((subframe_offset==0)||
(subframe_offset==5)) &&
(rb>=((frame_parms->N_RB_DL>>1)-3)) &&
(rb<((frame_parms->N_RB_DL>>1)+3)) &&
(l==nsymb-1) ) {
rb_alloc_ind = 0;
}
//PSS
if (((subframe_offset==1)||
(subframe_offset==6)) &&
(rb>=((frame_parms->N_RB_DL>>1)-3)) &&
(rb<((frame_parms->N_RB_DL>>1)+3)) &&
(l==2) ) {
rb_alloc_ind = 0;
}
} else { // FDD
//SSS
if (((subframe_offset==0)||(subframe_offset==5)) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==((nsymb>>1)-2)) ) {
rb_alloc_ind = 0;
}
//PSS
if (((subframe_offset==0)||(subframe_offset==5)) && (rb>=((frame_parms->N_RB_DL>>1)-3)) && (rb<((frame_parms->N_RB_DL>>1)+3)) && (l==((nsymb>>1)-1)) ) {
rb_alloc_ind = 0;
}
}
}
if (dlsch0_harq->Nlayers>1) {
msg("Nlayers %d: re_offset %d, symbol %d offset %d\n",dlsch0_harq->Nlayers,re_offset,l,symbol_offset);
return(-1);
}
if (dlsch1) {
if (dlsch1_harq->Nlayers>1) {
msg("Nlayers %d: re_offset %d, symbol %d offset %d\n",dlsch0_harq->Nlayers,re_offset,l,symbol_offset);
return(-1);
}
}
if (mod_order0 == 4)
qam_table_s0 = ((pilots) ? qam16_table_b0 : qam16_table_a0);
else if (mod_order0 == 6)
qam_table_s0 = ((pilots) ? qam64_table_b0 : qam64_table_a0);
else
qam_table_s0 = NULL;
if (mod_order1 == 4)
qam_table_s1 = ((pilots) ? qam16_table_b1 : qam16_table_a1);
else if (mod_order1 == 6)
qam_table_s1 = ((pilots) ? qam64_table_b1 : qam64_table_a1);
else
qam_table_s1 = NULL;
if (rb_alloc_ind > 0) {
// printf("Allocated rb %d/symbol %d, skip_half %d, subframe_offset %d, symbol_offset %d, re_offset %d, jj %d\n",rb,l,skip_half,subframe_offset,symbol_offset,re_offset,jj);
allocate_REs_in_RB(frame_parms,
txdataF,
&jj,
&jj2,
re_offset,
symbol_offset,
dlsch0->harq_processes[harq_pid],
(dlsch1==NULL) ? NULL : dlsch1->harq_processes[harq_pid],
pilots,
((pilots) ? amp_rho_b : amp_rho_a),
get_pmi(frame_parms->N_RB_DL,dlsch0->harq_processes[harq_pid],rb),
qam_table_s0,
qam_table_s1,
&re_allocated,
skip_dc,
skip_half);
}
re_offset+=12; // go to next RB
// check if we crossed the symbol boundary and skip DC
if (re_offset >= frame_parms->ofdm_symbol_size) {
if (skip_dc == 0) //even number of RBs (doesn't straddle DC)
re_offset=1;
else
re_offset=7; // odd number of RBs
}
}
}
#ifdef DEBUG_DLSCH_MODULATION
msg("generate_dlsch : jj = %d,re_allocated = %d (G %d)\n",jj,re_allocated,get_G(frame_parms,dlsch0_harq->nb_rb,dlsch0_harq->rb_alloc,mod_order0,Nl0,2,0,subframe_offset));
#endif
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_MODULATION, VCD_FUNCTION_OUT);
return (re_allocated);
}
int mch_modulation(mod_sym_t **txdataF,
int16_t amp,
uint32_t subframe_offset,
LTE_DL_FRAME_PARMS *frame_parms,
LTE_eNB_DLSCH_t *dlsch)
{
uint8_t nsymb,nsymb_pmch;
uint32_t i,jj,re_allocated,symbol_offset;
uint16_t l,rb,re_offset;
uint8_t skip_dc=0;
uint8_t mod_order = get_Qm(dlsch->harq_processes[0]->mcs);
int16_t qam16_table_a[4],qam64_table_a[8];//,qam16_table_b[4],qam64_table_b[8];
int16_t *qam_table_s;
nsymb_pmch = 12;
nsymb = (frame_parms->Ncp == NORMAL) ? 14 : 12;
if (mod_order == 4)
for (i=0; i<4; i++) {
qam16_table_a[i] = (int16_t)(((int32_t)qam16_table[i]*amp)>>15);
}
else if (mod_order == 6)
for (i=0; i<8; i++) {
qam64_table_a[i] = (int16_t)(((int32_t)qam64_table[i]*amp)>>15);
}
jj=0;
re_allocated=0;
// printf("num_pdcch_symbols %d, nsymb %d\n",num_pdcch_symbols,nsymb);
for (l=2; l<nsymb_pmch; l++) {
#ifdef DEBUG_DLSCH_MODULATION
printf("Generating MCH (mod %d) in subframe %d for symbol %d\n",mod_order, subframe_offset,l);
#endif
re_offset = frame_parms->first_carrier_offset;
symbol_offset = (uint32_t)frame_parms->ofdm_symbol_size*(l+(subframe_offset*nsymb));
for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
if ((frame_parms->N_RB_DL&1) == 1) { // ODD N_RB_DL
if (rb==(frame_parms->N_RB_DL>>1))
skip_dc = 1;
else
skip_dc = 0;
}
if (mod_order == 4)
qam_table_s = qam16_table_a;
else if (mod_order == 6)
qam_table_s = qam64_table_a;
else
qam_table_s = NULL;
// printf("Allocated rb %d, subframe_offset %d,amp %d\n",rb,subframe_offset,amp);
allocate_REs_in_RB_MCH(txdataF,
&jj,
re_offset,
symbol_offset,
dlsch->harq_processes[0]->e,
l,
mod_order,
amp,
qam_table_s,
&re_allocated,
skip_dc,
frame_parms);
re_offset+=12; // go to next RB
// check if we crossed the symbol boundary and skip DC
if (re_offset >= frame_parms->ofdm_symbol_size) {
if (skip_dc == 0) //even number of RBs (doesn't straddle DC)
re_offset=1;
else
re_offset=7; // odd number of RBs
}
}
}
#ifdef DEBUG_DLSCH_MODULATION
msg("generate_dlsch(MCH) : jj = %d,re_allocated = %d (G %d)\n",jj,re_allocated,get_G(frame_parms,dlsch->harq_processes[0]->nb_rb,dlsch->harq_processes[0]->rb_alloc,mod_order,1,2,0,subframe_offset));
#endif
return (re_allocated);
}
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