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Commit 25449148 authored by francescomani's avatar francescomani
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addressing review and correcting indentation

parent 3a8db593
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Showing with 481 additions and 517 deletions
openair1/SIMULATION/NR_PHY/dlsim.c
View file @ 25449148
......@@ -382,7 +382,6 @@ int main(int argc, char **argv)
float effRate;
//float psnr;
float eff_tp_check = 0.7;
uint8_t snrRun;
uint32_t TBS = 0;
int **txdata;
double **s_re,**s_im,**r_re,**r_im;
......@@ -463,8 +462,8 @@ int main(int argc, char **argv)
int print_perf = 0;
FILE *scg_fd=NULL;
while ((c = getopt (argc, argv, "f:hA:pf:g:i:n:s:S:t:v:x:y:z:M:N:F:GR:d:PI:L:Ea:b:e:m:w:T:U:q:X:Y")) != -1) {
while ((c = getopt(argc, argv, "f:hA:pf:g:i:n:s:S:t:v:x:y:z:M:N:F:GR:d:PI:L:Ea:b:e:m:w:T:U:q:X:Y")) != -1) {
switch (c) {
case 'f':
scg_fd = fopen(optarg,"r");
......@@ -571,13 +570,9 @@ int main(int argc, char **argv)
break;
case 'v':
num_rounds=atoi(optarg);
if (num_rounds < 1) {
printf("Unsupported number of rounds %d\n", num_rounds);
exit(-1);
}
num_rounds = atoi(optarg);
AssertFatal(num_rounds > 0 && num_rounds < 16, "Unsupported number of rounds %d, should be in [1,16]\n", num_rounds);
break;
case 'y':
......@@ -736,21 +731,6 @@ int main(int argc, char **argv)
}
}
uint32_t errors_scrambling[num_rounds][100];
int n_errors[num_rounds][100];
int round_trials[num_rounds][100];
double roundStats[100];
double blerStats[num_rounds][100];
double berStats[num_rounds][100];
double snrStats[100];
memset(errors_scrambling, 0, sizeof(uint32_t)*num_rounds*100);
memset(n_errors, 0, sizeof(int)*num_rounds*100);
memset(round_trials, 0, sizeof(int)*num_rounds*100);
memset(blerStats, 0, sizeof(double)*num_rounds*100);
memset(berStats, 0, sizeof(double)*num_rounds*100);
memset(snrStats, 0, sizeof(double)*100);
memset(roundStats, 0, sizeof(double)*100);
logInit();
set_glog(loglvl);
T_stdout = 1;
......@@ -1053,7 +1033,6 @@ int main(int argc, char **argv)
nr_ue_phy_config_request(&UE_mac->phy_config);
//NR_COMMON_channels_t *cc = RC.nrmac[0]->common_channels;
snrRun = 0;
int n_errs = 0;
initNamedTpool(gNBthreads, &gNB->threadPool, true, "gNB-tpool");
......@@ -1084,6 +1063,13 @@ int main(int argc, char **argv)
clear_pdsch_stats(gNB);
uint32_t errors_scrambling[16] = {0};
int n_errors[16] = {0};
int round_trials[16] = {0};
double roundStats = {0};
double blerStats[16] = {0};
double berStats[16] = {0};
effRate = 0;
//n_errors2 = 0;
//n_alamouti = 0;
......@@ -1117,7 +1103,7 @@ int main(int argc, char **argv)
UE_harq_process->first_rx = 1;
while ((round<num_rounds) && (UE_harq_process->ack==0)) {
round_trials[round][snrRun]++;
round_trials[round]++;
clear_nr_nfapi_information(RC.nrmac[0], 0, frame, slot);
UE_info->UE_sched_ctrl.harq_processes[harq_pid].ndi = !(trial&1);
......@@ -1288,9 +1274,8 @@ int main(int argc, char **argv)
//---------------------- count errors ----------------------
//----------------------------------------------------------
if (UE->dlsch[0][0]->last_iteration_cnt >=
UE->dlsch[0][0]->max_ldpc_iterations+1)
n_errors[round][snrRun]++;
if (UE->dlsch[0][0]->last_iteration_cnt >= UE->dlsch[0][0]->max_ldpc_iterations + 1)
n_errors[round]++;
NR_UE_PDSCH **pdsch_vars = UE->pdsch_vars;
int16_t *UE_llr = pdsch_vars[0]->llr[0];
......@@ -1312,10 +1297,10 @@ int main(int argc, char **argv)
if(((gNB_dlsch->harq_process.f[i] == 0) && (UE_llr[i] <= 0)) ||
((gNB_dlsch->harq_process.f[i] == 1) && (UE_llr[i] >= 0)))
{
if(errors_scrambling[round][snrRun] == 0) {
if (errors_scrambling[round] == 0) {
LOG_D(PHY,"First bit in error in unscrambling = %d\n",i);
}
errors_scrambling[round][snrRun]++;
errors_scrambling[round]++;
}
}
......@@ -1343,40 +1328,34 @@ int main(int argc, char **argv)
if (n_trials == 1)
printf("errors_bit = %u (trial %d)\n", errors_bit, trial);
}
roundStats[snrRun]+=((float)round);
roundStats += ((float)round);
if (UE_harq_process->ack==1) effRate += ((float)TBS)/round;
} // noise trials
roundStats[snrRun]/=((float)n_trials);
roundStats /= ((float)n_trials);
for (int r = 0; r < num_rounds; r++) {
blerStats[r][snrRun] = (double)n_errors[r][snrRun]/round_trials[r][snrRun];
berStats[r][snrRun] = (double)errors_scrambling[r][snrRun]/available_bits/round_trials[r][snrRun];
blerStats[r] = (double)n_errors[r] / round_trials[r];
berStats[r] = (double)errors_scrambling[r] / available_bits / round_trials[r];
}
effRate /= n_trials;
printf("*****************************************\n");
printf("SNR %f: n_errors (%d/%d", SNR, n_errors[0][snrRun], round_trials[0][snrRun]);
printf("SNR %f: n_errors (%d/%d", SNR, n_errors[0], round_trials[0]);
for (int r = 1; r < num_rounds; r++)
printf(",%d/%d", n_errors[r][snrRun], round_trials[r][snrRun]);
printf(") (negative CRC), false_positive %d/%d, errors_scrambling (%u/%u",
n_false_positive, n_trials,
errors_scrambling[0][snrRun], available_bits*round_trials[0][snrRun]);
printf(",%d/%d", n_errors[r], round_trials[r]);
printf(") (negative CRC), false_positive %d/%d, errors_scrambling (%u/%u", n_false_positive, n_trials, errors_scrambling[0], available_bits * round_trials[0]);
for (int r = 1; r < num_rounds; r++)
printf(",%u/%u", errors_scrambling[r][snrRun], available_bits*round_trials[r][snrRun]);
printf(",%u/%u", errors_scrambling[r], available_bits * round_trials[r]);
printf(")\n\n");
dump_pdsch_stats(stdout,gNB);
printf("SNR %f: Channel BLER (%e", SNR, blerStats[0][snrRun]);
printf("SNR %f: Channel BLER (%e", SNR, blerStats[0]);
for (int r = 1; r < num_rounds; r++)
printf(",%e", blerStats[r][snrRun]);
printf("), Channel BER (%e", berStats[0][snrRun]);
printf(",%e", blerStats[r]);
printf("), Channel BER (%e", berStats[0]);
for (int r = 1; r < num_rounds; r++)
printf(",%e", berStats[r][snrRun]);
printf(") Avg round %.2f, Eff Rate %.4f bits/slot, Eff Throughput %.2f, TBS %u bits/slot\n",
roundStats[snrRun],
effRate,
effRate/TBS*100,
TBS);
printf(",%e", berStats[r]);
printf(") Avg round %.2f, Eff Rate %.4f bits/slot, Eff Throughput %.2f, TBS %u bits/slot\n", roundStats, effRate, effRate / TBS * 100, TBS);
printf("*****************************************\n");
printf("\n");
......@@ -1450,24 +1429,9 @@ int main(int argc, char **argv)
break;
}
snrStats[snrRun] = SNR;
snrRun++;
n_errs = n_errors[0][snrRun];
n_errs = n_errors[0];
} // NSR
LOG_M("dlsimStats.m","SNR",snrStats,snrRun,1,7);
LOG_MM("dlsimStats.m","BLER",blerStats,snrRun,1,7);
LOG_MM("dlsimStats.m","BER",berStats,snrRun,1,7);
LOG_MM("dlsimStats.m","rounds",roundStats,snrRun,1,7);
/*if (n_trials>1) {
printf("HARQ stats:\nSNR\tRounds\n");
psnr = snr0;
for (uint8_t i=0; i<snrRun; i++) {
printf("%.1f\t%.2f\n",psnr,roundStats[i]);
psnr+=0.2;
}
}*/
free_channel_desc_scm(gNB2UE);
for (i = 0; i < n_tx; i++) {
......
openair1/SIMULATION/NR_PHY/ulsim.c
View file @ 25449148
......@@ -313,11 +313,10 @@ int main(int argc, char **argv)
cpuf = get_cpu_freq_GHz();
int msg3_flag = 0;
int rv_index = 0;
float roundStats[100];
double effRate[100];
double effTP[100];
float roundStats;
double effRate;
double effTP;
float eff_tp_check = 100;
uint8_t snrRun;
int ldpc_offload_flag = 0;
uint8_t max_rounds = 4;
int chest_type[2] = {0};
......@@ -498,6 +497,7 @@ int main(int argc, char **argv)
case 'v':
max_rounds = atoi(optarg);
AssertFatal(max_rounds > 0 && max_rounds < 16, "Unsupported number of rounds %d, should be in [1,16]\n", max_rounds);
break;
case 'w':
......@@ -1004,7 +1004,6 @@ int main(int argc, char **argv)
}
//for (int i=0;i<16;i++) printf("%f\n",gaussdouble(0.0,1.0));
snrRun = 0;
int read_errors=0;
int slot_offset = frame_parms->get_samples_slot_timestamp(slot,frame_parms,0);
......@@ -1057,26 +1056,13 @@ int main(int argc, char **argv)
}
int ret = 1;
AssertFatal(max_rounds > 0, "Invalind value for max number of rounds %d\n",max_rounds);
uint32_t errors_scrambling[max_rounds][100];
int n_errors[max_rounds][100];
int round_trials[max_rounds][100];
double blerStats[max_rounds][100];
double berStats[max_rounds][100];
double snrStats[100];
memset(errors_scrambling, 0, sizeof(uint32_t)*max_rounds*100);
memset(n_errors, 0, sizeof(int)*max_rounds*100);
memset(round_trials, 0, sizeof(int)*max_rounds*100);
memset(blerStats, 0, sizeof(double)*max_rounds*100);
memset(berStats, 0, sizeof(double)*max_rounds*100);
memset(snrStats, 0, sizeof(double)*100);
for (SNR = snr0; SNR < snr1; SNR += snr_step) {
varArray_t *table_rx=initVarArray(1000,sizeof(double));
int error_flag = 0;
n_false_positive = 0;
effRate[snrRun] = 0;
effTP[snrRun] = 0;
effRate = 0;
effTP = 0;
roundStats = 0;
reset_meas(&gNB->phy_proc_rx);
reset_meas(&gNB->rx_pusch_stats);
reset_meas(&gNB->ulsch_decoding_stats);
......@@ -1093,254 +1079,241 @@ int main(int argc, char **argv)
reset_meas(&UE->ulsch_interleaving_stats);
reset_meas(&UE->ulsch_encoding_stats);
uint32_t errors_scrambling[16] = {0};
int n_errors[16] = {0};
int round_trials[16] = {0};
double blerStats[16] = {0};
double berStats[16] = {0};
clear_pusch_stats(gNB);
for (trial = 0; trial < n_trials; trial++) {
uint8_t round = 0;
crc_status = 1;
errors_decoding = 0;
memset((void*)roundStats,0,50*sizeof(roundStats[0]));
while (round<max_rounds && crc_status) {
round_trials[round][snrRun]++;
ulsch_ue->harq_processes[harq_pid]->round = round;
gNB->ulsch[0]->harq_processes[harq_pid]->round = round;
rv_index = nr_rv_round_map[round%4];
UE_proc.nr_slot_tx = slot;
UE_proc.frame_tx = frame;
UL_tti_req->SFN = frame;
UL_tti_req->Slot = slot;
UL_tti_req->n_pdus = 1;
UL_tti_req->pdus_list[0].pdu_type = NFAPI_NR_UL_CONFIG_PUSCH_PDU_TYPE;
UL_tti_req->pdus_list[0].pdu_size = sizeof(nfapi_nr_pusch_pdu_t);
memset(pusch_pdu,0,sizeof(nfapi_nr_pusch_pdu_t));
int abwp_size = NRRIV2BW(ubwp->bwp_Common->genericParameters.locationAndBandwidth,275);
int abwp_start = NRRIV2PRBOFFSET(ubwp->bwp_Common->genericParameters.locationAndBandwidth,275);
int ibwp_size = ibwps;
int ibwp_start = ibwp_rboffset;
if (msg3_flag == 1) {
if ((ibwp_start < abwp_start) || (ibwp_size > abwp_size))
pusch_pdu->bwp_start = abwp_start;
else
pusch_pdu->bwp_start = ibwp_start;
pusch_pdu->bwp_size = ibwp_size;
start_rb = (ibwp_start - abwp_start);
printf("msg3: ibwp_size %d, abwp_size %d, ibwp_start %d, abwp_start %d\n",
ibwp_size,abwp_size,ibwp_start,abwp_start);
}
else {
pusch_pdu->bwp_start = abwp_start;
pusch_pdu->bwp_size = abwp_size;
}
pusch_pdu->pusch_data.tb_size = TBS>>3;
pusch_pdu->pdu_bit_map = pdu_bit_map;
pusch_pdu->rnti = n_rnti;
pusch_pdu->mcs_index = Imcs;
pusch_pdu->mcs_table = mcs_table;
pusch_pdu->target_code_rate = code_rate;
pusch_pdu->qam_mod_order = mod_order;
pusch_pdu->transform_precoding = transform_precoding;
pusch_pdu->data_scrambling_id = *scc->physCellId;
pusch_pdu->nrOfLayers = precod_nbr_layers;
pusch_pdu->ul_dmrs_symb_pos = l_prime_mask;
pusch_pdu->dmrs_config_type = dmrs_config_type;
pusch_pdu->ul_dmrs_scrambling_id = *scc->physCellId;
pusch_pdu->scid = 0;
pusch_pdu->dmrs_ports = ((1<<precod_nbr_layers)-1);
pusch_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
pusch_pdu->resource_alloc = 1;
pusch_pdu->rb_start = start_rb;
pusch_pdu->rb_size = nb_rb;
pusch_pdu->vrb_to_prb_mapping = 0;
pusch_pdu->frequency_hopping = 0;
pusch_pdu->uplink_frequency_shift_7p5khz = 0;
pusch_pdu->start_symbol_index = start_symbol;
pusch_pdu->nr_of_symbols = nb_symb_sch;
pusch_pdu->maintenance_parms_v3.tbSizeLbrmBytes = tbslbrm;
pusch_pdu->pusch_data.rv_index = rv_index;
pusch_pdu->pusch_data.harq_process_id = 0;
pusch_pdu->pusch_data.new_data_indicator = trial & 0x1;
pusch_pdu->pusch_data.num_cb = 0;
pusch_pdu->pusch_ptrs.ptrs_time_density = ptrs_time_density;
pusch_pdu->pusch_ptrs.ptrs_freq_density = ptrs_freq_density;
pusch_pdu->pusch_ptrs.ptrs_ports_list = (nfapi_nr_ptrs_ports_t *) malloc(2*sizeof(nfapi_nr_ptrs_ports_t));
pusch_pdu->pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset = 0;
pusch_pdu->maintenance_parms_v3.ldpcBaseGraph = get_BG(TBS, code_rate);
// if transform precoding is enabled
if (transform_precoding == transformPrecoder_enabled) {
pusch_pdu->dfts_ofdm.low_papr_group_number = *scc->physCellId % 30; // U as defined in 38.211 section 6.4.1.1.1.2
pusch_pdu->dfts_ofdm.low_papr_sequence_number = 0; // V as defined in 38.211 section 6.4.1.1.1.2
pusch_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
}
// prepare ULSCH/PUSCH reception
pushNotifiedFIFO(&gNB->L1_tx_free, msgL1Tx); // to unblock the process in the beginning
nr_schedule_response(Sched_INFO);
uint8_t round = 0;
crc_status = 1;
errors_decoding = 0;
while (round < max_rounds && crc_status) {
round_trials[round]++;
ulsch_ue->harq_processes[harq_pid]->round = round;
gNB->ulsch[0]->harq_processes[harq_pid]->round = round;
rv_index = nr_rv_round_map[round % 4];
UE_proc.nr_slot_tx = slot;
UE_proc.frame_tx = frame;
UL_tti_req->SFN = frame;
UL_tti_req->Slot = slot;
UL_tti_req->n_pdus = 1;
UL_tti_req->pdus_list[0].pdu_type = NFAPI_NR_UL_CONFIG_PUSCH_PDU_TYPE;
UL_tti_req->pdus_list[0].pdu_size = sizeof(nfapi_nr_pusch_pdu_t);
memset(pusch_pdu, 0, sizeof(nfapi_nr_pusch_pdu_t));
int abwp_size = NRRIV2BW(ubwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
int abwp_start = NRRIV2PRBOFFSET(ubwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
int ibwp_size = ibwps;
int ibwp_start = ibwp_rboffset;
if (msg3_flag == 1) {
if ((ibwp_start < abwp_start) || (ibwp_size > abwp_size))
pusch_pdu->bwp_start = abwp_start;
else
pusch_pdu->bwp_start = ibwp_start;
pusch_pdu->bwp_size = ibwp_size;
start_rb = (ibwp_start - abwp_start);
printf("msg3: ibwp_size %d, abwp_size %d, ibwp_start %d, abwp_start %d\n", ibwp_size, abwp_size, ibwp_start, abwp_start);
} else {
pusch_pdu->bwp_start = abwp_start;
pusch_pdu->bwp_size = abwp_size;
}
// --------- setting parameters for UE --------
pusch_pdu->pusch_data.tb_size = TBS >> 3;
pusch_pdu->pdu_bit_map = pdu_bit_map;
pusch_pdu->rnti = n_rnti;
pusch_pdu->mcs_index = Imcs;
pusch_pdu->mcs_table = mcs_table;
pusch_pdu->target_code_rate = code_rate;
pusch_pdu->qam_mod_order = mod_order;
pusch_pdu->transform_precoding = transform_precoding;
pusch_pdu->data_scrambling_id = *scc->physCellId;
pusch_pdu->nrOfLayers = precod_nbr_layers;
pusch_pdu->ul_dmrs_symb_pos = l_prime_mask;
pusch_pdu->dmrs_config_type = dmrs_config_type;
pusch_pdu->ul_dmrs_scrambling_id = *scc->physCellId;
pusch_pdu->scid = 0;
pusch_pdu->dmrs_ports = ((1 << precod_nbr_layers) - 1);
pusch_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
pusch_pdu->resource_alloc = 1;
pusch_pdu->rb_start = start_rb;
pusch_pdu->rb_size = nb_rb;
pusch_pdu->vrb_to_prb_mapping = 0;
pusch_pdu->frequency_hopping = 0;
pusch_pdu->uplink_frequency_shift_7p5khz = 0;
pusch_pdu->start_symbol_index = start_symbol;
pusch_pdu->nr_of_symbols = nb_symb_sch;
pusch_pdu->maintenance_parms_v3.tbSizeLbrmBytes = tbslbrm;
pusch_pdu->pusch_data.rv_index = rv_index;
pusch_pdu->pusch_data.harq_process_id = 0;
pusch_pdu->pusch_data.new_data_indicator = trial & 0x1;
pusch_pdu->pusch_data.num_cb = 0;
pusch_pdu->pusch_ptrs.ptrs_time_density = ptrs_time_density;
pusch_pdu->pusch_ptrs.ptrs_freq_density = ptrs_freq_density;
pusch_pdu->pusch_ptrs.ptrs_ports_list = (nfapi_nr_ptrs_ports_t *)malloc(2 * sizeof(nfapi_nr_ptrs_ports_t));
pusch_pdu->pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset = 0;
pusch_pdu->maintenance_parms_v3.ldpcBaseGraph = get_BG(TBS, code_rate);
// if transform precoding is enabled
if (transform_precoding == transformPrecoder_enabled) {
pusch_pdu->dfts_ofdm.low_papr_group_number = *scc->physCellId % 30; // U as defined in 38.211 section 6.4.1.1.1.2
pusch_pdu->dfts_ofdm.low_papr_sequence_number = 0; // V as defined in 38.211 section 6.4.1.1.1.2
pusch_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
}
scheduled_response.module_id = 0;
scheduled_response.CC_id = 0;
scheduled_response.frame = frame;
scheduled_response.slot = slot;
scheduled_response.dl_config = NULL;
scheduled_response.ul_config = &ul_config;
scheduled_response.tx_request = &tx_req;
// Config UL TX PDU
tx_req.slot = slot;
tx_req.sfn = frame;
// tx_req->tx_config // TbD
tx_req.number_of_pdus = 1;
tx_req.tx_request_body[0].pdu_length = TBS/8;
tx_req.tx_request_body[0].pdu_index = 0;
tx_req.tx_request_body[0].pdu = &ulsch_input_buffer[0];
ul_config.slot = slot;
ul_config.number_pdus = 1;
ul_config.ul_config_list[0].pdu_type = FAPI_NR_UL_CONFIG_TYPE_PUSCH;
ul_config.ul_config_list[0].pusch_config_pdu.rnti = n_rnti;
ul_config.ul_config_list[0].pusch_config_pdu.pdu_bit_map = pdu_bit_map;
ul_config.ul_config_list[0].pusch_config_pdu.qam_mod_order = mod_order;
ul_config.ul_config_list[0].pusch_config_pdu.rb_size = nb_rb;
ul_config.ul_config_list[0].pusch_config_pdu.rb_start = start_rb;
ul_config.ul_config_list[0].pusch_config_pdu.nr_of_symbols = nb_symb_sch;
ul_config.ul_config_list[0].pusch_config_pdu.start_symbol_index = start_symbol;
ul_config.ul_config_list[0].pusch_config_pdu.ul_dmrs_symb_pos = l_prime_mask;
ul_config.ul_config_list[0].pusch_config_pdu.dmrs_config_type = dmrs_config_type;
ul_config.ul_config_list[0].pusch_config_pdu.mcs_index = Imcs;
ul_config.ul_config_list[0].pusch_config_pdu.mcs_table = mcs_table;
ul_config.ul_config_list[0].pusch_config_pdu.num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
ul_config.ul_config_list[0].pusch_config_pdu.nrOfLayers = precod_nbr_layers;
ul_config.ul_config_list[0].pusch_config_pdu.dmrs_ports = ((1<<precod_nbr_layers)-1);
ul_config.ul_config_list[0].pusch_config_pdu.absolute_delta_PUSCH = 0;
ul_config.ul_config_list[0].pusch_config_pdu.target_code_rate = code_rate;
ul_config.ul_config_list[0].pusch_config_pdu.tbslbrm = tbslbrm;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.tb_size = TBS/8;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.new_data_indicator = trial & 0x1;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.rv_index = rv_index;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.harq_process_id = harq_pid;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_time_density = ptrs_time_density;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_freq_density = ptrs_freq_density;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_ports_list = (nfapi_nr_ue_ptrs_ports_t *) malloc(2*sizeof(nfapi_nr_ue_ptrs_ports_t));
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset = 0;
ul_config.ul_config_list[0].pusch_config_pdu.transform_precoding = transform_precoding;
// if transform precoding is enabled
if (transform_precoding == transformPrecoder_enabled) {
ul_config.ul_config_list[0].pusch_config_pdu.dfts_ofdm.low_papr_group_number = *scc->physCellId % 30;// U as defined in 38.211 section 6.4.1.1.1.2
ul_config.ul_config_list[0].pusch_config_pdu.dfts_ofdm.low_papr_sequence_number = 0;// V as defined in 38.211 section 6.4.1.1.1.2
//ul_config.ul_config_list[0].pusch_config_pdu.pdu_bit_map |= PUSCH_PDU_BITMAP_DFTS_OFDM;
// prepare ULSCH/PUSCH reception
pushNotifiedFIFO(&gNB->L1_tx_free, msgL1Tx); // to unblock the process in the beginning
nr_schedule_response(Sched_INFO);
// --------- setting parameters for UE --------
scheduled_response.module_id = 0;
scheduled_response.CC_id = 0;
scheduled_response.frame = frame;
scheduled_response.slot = slot;
scheduled_response.dl_config = NULL;
scheduled_response.ul_config = &ul_config;
scheduled_response.tx_request = &tx_req;
// Config UL TX PDU
tx_req.slot = slot;
tx_req.sfn = frame;
// tx_req->tx_config // TbD
tx_req.number_of_pdus = 1;
tx_req.tx_request_body[0].pdu_length = TBS / 8;
tx_req.tx_request_body[0].pdu_index = 0;
tx_req.tx_request_body[0].pdu = &ulsch_input_buffer[0];
ul_config.slot = slot;
ul_config.number_pdus = 1;
ul_config.ul_config_list[0].pdu_type = FAPI_NR_UL_CONFIG_TYPE_PUSCH;
ul_config.ul_config_list[0].pusch_config_pdu.rnti = n_rnti;
ul_config.ul_config_list[0].pusch_config_pdu.pdu_bit_map = pdu_bit_map;
ul_config.ul_config_list[0].pusch_config_pdu.qam_mod_order = mod_order;
ul_config.ul_config_list[0].pusch_config_pdu.rb_size = nb_rb;
ul_config.ul_config_list[0].pusch_config_pdu.rb_start = start_rb;
ul_config.ul_config_list[0].pusch_config_pdu.nr_of_symbols = nb_symb_sch;
ul_config.ul_config_list[0].pusch_config_pdu.start_symbol_index = start_symbol;
ul_config.ul_config_list[0].pusch_config_pdu.ul_dmrs_symb_pos = l_prime_mask;
ul_config.ul_config_list[0].pusch_config_pdu.dmrs_config_type = dmrs_config_type;
ul_config.ul_config_list[0].pusch_config_pdu.mcs_index = Imcs;
ul_config.ul_config_list[0].pusch_config_pdu.mcs_table = mcs_table;
ul_config.ul_config_list[0].pusch_config_pdu.num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
ul_config.ul_config_list[0].pusch_config_pdu.nrOfLayers = precod_nbr_layers;
ul_config.ul_config_list[0].pusch_config_pdu.dmrs_ports = ((1 << precod_nbr_layers) - 1);
ul_config.ul_config_list[0].pusch_config_pdu.absolute_delta_PUSCH = 0;
ul_config.ul_config_list[0].pusch_config_pdu.target_code_rate = code_rate;
ul_config.ul_config_list[0].pusch_config_pdu.tbslbrm = tbslbrm;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.tb_size = TBS / 8;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.new_data_indicator = trial & 0x1;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.rv_index = rv_index;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.harq_process_id = harq_pid;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_time_density = ptrs_time_density;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_freq_density = ptrs_freq_density;
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_ports_list = (nfapi_nr_ue_ptrs_ports_t *)malloc(2 * sizeof(nfapi_nr_ue_ptrs_ports_t));
ul_config.ul_config_list[0].pusch_config_pdu.pusch_ptrs.ptrs_ports_list[0].ptrs_re_offset = 0;
ul_config.ul_config_list[0].pusch_config_pdu.transform_precoding = transform_precoding;
// if transform precoding is enabled
if (transform_precoding == transformPrecoder_enabled) {
ul_config.ul_config_list[0].pusch_config_pdu.dfts_ofdm.low_papr_group_number = *scc->physCellId % 30; // U as defined in 38.211 section 6.4.1.1.1.2
ul_config.ul_config_list[0].pusch_config_pdu.dfts_ofdm.low_papr_sequence_number = 0; // V as defined in 38.211 section 6.4.1.1.1.2
// ul_config.ul_config_list[0].pusch_config_pdu.pdu_bit_map |= PUSCH_PDU_BITMAP_DFTS_OFDM;
ul_config.ul_config_list[0].pusch_config_pdu.num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
}
}
//nr_fill_ulsch(gNB,frame,slot,pusch_pdu); // Not needed as its its already filled as apart of "nr_schedule_response(Sched_INFO);"
for (int i=0;i<(TBS/8);i++) ulsch_ue->harq_processes[harq_pid]->a[i]=i&0xff;
if (input_fd == NULL) {
// set FAPI parameters for UE, put them in the scheduled response and call
nr_ue_scheduled_response(&scheduled_response);
/////////////////////////phy_procedures_nr_ue_TX///////////////////////
///////////
phy_procedures_nrUE_TX(UE, &UE_proc, gNB_id);
/* We need to call common sending function to send signal */
LOG_D(PHY, "Sending Uplink data \n");
nr_ue_pusch_common_procedures(UE,
slot,
&UE->frame_parms,
UE->frame_parms.nb_antennas_tx);
if (n_trials==1) {
LOG_M("txsig0.m","txs0", &UE->common_vars.txdata[0][slot_offset],slot_length,1,1);
LOG_M("txsig0F.m","txs0F", UE->common_vars.txdataF[0],frame_parms->ofdm_symbol_size*14,1,1);
if (precod_nbr_layers > 1) {
LOG_M("txsig1.m","txs1", &UE->common_vars.txdata[1][slot_offset],slot_length,1,1);
LOG_M("txsig1F.m","txs1F", UE->common_vars.txdataF[1],frame_parms->ofdm_symbol_size*14,1,1);
if (precod_nbr_layers==4) {
LOG_M("txsig2.m","txs2", &UE->common_vars.txdata[2][slot_offset],slot_length,1,1);
LOG_M("txsig3.m","txs3", &UE->common_vars.txdata[3][slot_offset],slot_length,1,1);
LOG_M("txsig2F.m","txs2F", UE->common_vars.txdataF[2],frame_parms->ofdm_symbol_size*14,1,1);
LOG_M("txsig3F.m","txs3F", UE->common_vars.txdataF[3],frame_parms->ofdm_symbol_size*14,1,1);
// nr_fill_ulsch(gNB,frame,slot,pusch_pdu); // Not needed as its its already filled as apart of "nr_schedule_response(Sched_INFO);"
for (int i = 0; i < (TBS / 8); i++)
ulsch_ue->harq_processes[harq_pid]->a[i] = i & 0xff;
if (input_fd == NULL) {
// set FAPI parameters for UE, put them in the scheduled response and call
nr_ue_scheduled_response(&scheduled_response);
/////////////////////////phy_procedures_nr_ue_TX///////////////////////
///////////
phy_procedures_nrUE_TX(UE, &UE_proc, gNB_id);
/* We need to call common sending function to send signal */
LOG_D(PHY, "Sending Uplink data \n");
nr_ue_pusch_common_procedures(UE, slot, &UE->frame_parms, UE->frame_parms.nb_antennas_tx);
if (n_trials == 1) {
LOG_M("txsig0.m", "txs0", &UE->common_vars.txdata[0][slot_offset], slot_length, 1, 1);
LOG_M("txsig0F.m", "txs0F", UE->common_vars.txdataF[0], frame_parms->ofdm_symbol_size * 14, 1, 1);
if (precod_nbr_layers > 1) {
LOG_M("txsig1.m", "txs1", &UE->common_vars.txdata[1][slot_offset], slot_length, 1, 1);
LOG_M("txsig1F.m", "txs1F", UE->common_vars.txdataF[1], frame_parms->ofdm_symbol_size * 14, 1, 1);
if (precod_nbr_layers == 4) {
LOG_M("txsig2.m", "txs2", &UE->common_vars.txdata[2][slot_offset], slot_length, 1, 1);
LOG_M("txsig3.m", "txs3", &UE->common_vars.txdata[3][slot_offset], slot_length, 1, 1);
LOG_M("txsig2F.m", "txs2F", UE->common_vars.txdataF[2], frame_parms->ofdm_symbol_size * 14, 1, 1);
LOG_M("txsig3F.m", "txs3F", UE->common_vars.txdataF[3], frame_parms->ofdm_symbol_size * 14, 1, 1);
}
}
}
}
///////////
////////////////////////////////////////////////////
tx_offset = frame_parms->get_samples_slot_timestamp(slot,frame_parms,0);
txlev_sum = 0;
for (int aa=0; aa<UE->frame_parms.nb_antennas_tx; aa++) {
atxlev[aa] = signal_energy(&UE->common_vars.txdata[aa][tx_offset + 5*frame_parms->ofdm_symbol_size + 4*frame_parms->nb_prefix_samples + frame_parms->nb_prefix_samples0],
frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples);
txlev_sum += atxlev[aa];
if (n_trials==1) printf("txlev[%d] = %d (%f dB) txlev_sum %d\n",aa,atxlev[aa],10*log10((double)atxlev[aa]),txlev_sum);
}
}
else
n_trials = 1;
if (input_fd == NULL) {
// Justification of division by precod_nbr_layers:
// When the channel is the identity matrix, the results in terms of SNR should be almost equal for 2x2 and 4x4.
sigma_dB = 10 * log10((double)txlev_sum/precod_nbr_layers * ((double)frame_parms->ofdm_symbol_size/(12*nb_rb))) - SNR;;
sigma = pow(10,sigma_dB/10);
if(n_trials==1) printf("sigma %f (%f dB), txlev_sum %f (factor %f)\n",sigma,sigma_dB,10*log10((double)txlev_sum),(double)(double)
frame_parms->ofdm_symbol_size/(12*nb_rb));
for (i=0; i<slot_length; i++) {
for (int aa=0; aa<UE->frame_parms.nb_antennas_tx; aa++) {
s_re[aa][i] = ((double)(((short *)&UE->common_vars.txdata[aa][slot_offset]))[(i<<1)]);
s_im[aa][i] = ((double)(((short *)&UE->common_vars.txdata[aa][slot_offset]))[(i<<1)+1]);
///////////
////////////////////////////////////////////////////
tx_offset = frame_parms->get_samples_slot_timestamp(slot, frame_parms, 0);
txlev_sum = 0;
for (int aa = 0; aa < UE->frame_parms.nb_antennas_tx; aa++) {
atxlev[aa] = signal_energy(&UE->common_vars.txdata[aa][tx_offset + 5 * frame_parms->ofdm_symbol_size + 4 * frame_parms->nb_prefix_samples + frame_parms->nb_prefix_samples0],
frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples);
txlev_sum += atxlev[aa];
if (n_trials == 1)
printf("txlev[%d] = %d (%f dB) txlev_sum %d\n", aa, atxlev[aa], 10 * log10((double)atxlev[aa]), txlev_sum);
}
} else
n_trials = 1;
if (input_fd == NULL) {
// Justification of division by precod_nbr_layers:
// When the channel is the identity matrix, the results in terms of SNR should be almost equal for 2x2 and 4x4.
sigma_dB = 10 * log10((double)txlev_sum / precod_nbr_layers * ((double)frame_parms->ofdm_symbol_size / (12 * nb_rb))) - SNR;
;
sigma = pow(10, sigma_dB / 10);
if (n_trials == 1)
printf("sigma %f (%f dB), txlev_sum %f (factor %f)\n", sigma, sigma_dB, 10 * log10((double)txlev_sum), (double)(double)frame_parms->ofdm_symbol_size / (12 * nb_rb));
for (i = 0; i < slot_length; i++) {
for (int aa = 0; aa < UE->frame_parms.nb_antennas_tx; aa++) {
s_re[aa][i] = ((double)(((short *)&UE->common_vars.txdata[aa][slot_offset]))[(i << 1)]);
s_im[aa][i] = ((double)(((short *)&UE->common_vars.txdata[aa][slot_offset]))[(i << 1) + 1]);
}
}
}
if (UE2gNB->max_Doppler == 0) {
multipath_channel(UE2gNB, s_re, s_im, r_re, r_im, slot_length, 0, (n_trials==1)?1:0);
} else {
multipath_tv_channel(UE2gNB, s_re, s_im, r_re, r_im, 2*slot_length, 0);
}
add_noise(rxdata, (const double **) r_re, (const double **) r_im, sigma, slot_length, slot_offset, ts, delay, pdu_bit_map, frame_parms->nb_antennas_rx);
if (UE2gNB->max_Doppler == 0) {
multipath_channel(UE2gNB, s_re, s_im, r_re, r_im, slot_length, 0, (n_trials==1)?1:0);
} else {
multipath_tv_channel(UE2gNB, s_re, s_im, r_re, r_im, 2*slot_length, 0);
}
add_noise(rxdata, (const double **) r_re, (const double **) r_im, sigma, slot_length, slot_offset, ts, delay, pdu_bit_map, frame_parms->nb_antennas_rx);
} /*End input_fd */
} /*End input_fd */
if (pusch_pdu->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
set_ptrs_symb_idx(&ptrsSymPos, pusch_pdu->nr_of_symbols, pusch_pdu->start_symbol_index, 1 << ptrs_time_density, pusch_pdu->ul_dmrs_symb_pos);
ptrsSymbPerSlot = get_ptrs_symbols_in_slot(ptrsSymPos, pusch_pdu->start_symbol_index, pusch_pdu->nr_of_symbols);
ptrsRePerSymb = ((pusch_pdu->rb_size + ptrs_freq_density - 1) / ptrs_freq_density);
LOG_D(PHY, "[ULSIM] PTRS Symbols in a slot: %2u, RE per Symbol: %3u, RE in a slot %4d\n", ptrsSymbPerSlot, ptrsRePerSymb, ptrsSymbPerSlot * ptrsRePerSymb);
}
if(pusch_pdu->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
set_ptrs_symb_idx(&ptrsSymPos,
pusch_pdu->nr_of_symbols,
pusch_pdu->start_symbol_index,
1<<ptrs_time_density,
pusch_pdu->ul_dmrs_symb_pos);
ptrsSymbPerSlot = get_ptrs_symbols_in_slot(ptrsSymPos, pusch_pdu->start_symbol_index, pusch_pdu->nr_of_symbols);
ptrsRePerSymb = ((pusch_pdu->rb_size + ptrs_freq_density - 1)/ptrs_freq_density);
LOG_D(PHY,"[ULSIM] PTRS Symbols in a slot: %2u, RE per Symbol: %3u, RE in a slot %4d\n", ptrsSymbPerSlot,ptrsRePerSymb, ptrsSymbPerSlot*ptrsRePerSymb );
}
////////////////////////////////////////////////////////////
//----------------------------------------------------------
//------------------- gNB phy procedures -------------------
//----------------------------------------------------------
gNB->UL_INFO.rx_ind.number_of_pdus = 0;
gNB->UL_INFO.crc_ind.number_crcs = 0;
//----------------------------------------------------------
//------------------- gNB phy procedures -------------------
//----------------------------------------------------------
gNB->UL_INFO.rx_ind.number_of_pdus = 0;
gNB->UL_INFO.crc_ind.number_crcs = 0;
for(uint8_t symbol = 0; symbol < (gNB->frame_parms.Ncp == EXTENDED ? 12 : 14); symbol++) {
for (int aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++)
......@@ -1360,209 +1333,252 @@ int main(int argc, char **argv)
gNB->frame_parms.Ncp == EXTENDED ? 12 : 14);
}
ul_proc_error = phy_procedures_gNB_uespec_RX(gNB, frame, slot);
if (n_trials==1 && round==0) {
LOG_M("rxsig0.m","rx0",&rxdata[0][slot_offset],slot_length,1,1);
LOG_M("rxsigF0.m","rxsF0",gNB->common_vars.rxdataF[0],14*frame_parms->ofdm_symbol_size,1,1);
if (precod_nbr_layers > 1) {
LOG_M("rxsig1.m","rx1",&rxdata[1][slot_offset],slot_length,1,1);
LOG_M("rxsigF1.m","rxsF1",gNB->common_vars.rxdataF[1],14*frame_parms->ofdm_symbol_size,1,1);
if (precod_nbr_layers==4) {
LOG_M("rxsig2.m","rx2",&rxdata[2][slot_offset],slot_length,1,1);
LOG_M("rxsig3.m","rx3",&rxdata[3][slot_offset],slot_length,1,1);
LOG_M("rxsigF2.m","rxsF2",gNB->common_vars.rxdataF[2],14*frame_parms->ofdm_symbol_size,1,1);
LOG_M("rxsigF3.m","rxsF3",gNB->common_vars.rxdataF[3],14*frame_parms->ofdm_symbol_size,1,1);
}
}
}
if (n_trials == 1 && round==0) {
__attribute__((unused))
int off = ((nb_rb&1) == 1)? 4:0;
LOG_M("rxsigF0_ext.m","rxsF0_ext",
&gNB->pusch_vars[0]->rxdataF_ext[0][start_symbol*NR_NB_SC_PER_RB * pusch_pdu->rb_size],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chestF0.m","chF0",
&gNB->pusch_vars[0]->ul_ch_estimates[0][start_symbol*frame_parms->ofdm_symbol_size],frame_parms->ofdm_symbol_size,1,1);
LOG_M("chestT0.m","chT0",
&gNB->pusch_vars[0]->ul_ch_estimates_time[0][0],frame_parms->ofdm_symbol_size,1,1);
LOG_M("chestF0_ext.m","chF0_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[0][(start_symbol+1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch-1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF0_comp.m","rxsF0_comp",
&gNB->pusch_vars[0]->rxdataF_comp[0][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chmagF0.m","chmF0",
&gNB->pusch_vars[0]->ul_ch_mag[0][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chmagbF0.m","chmbF0",
&gNB->pusch_vars[0]->ul_ch_magb[0][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF0_llrlayers0.m","rxsF0_llrlayers0",
&gNB->pusch_vars[0]->llr_layers[0][0],(nb_symb_sch-1)*NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,1,0);
if (precod_nbr_layers==2) {
LOG_M("rxsigF1_ext.m","rxsF1_ext",
&gNB->pusch_vars[0]->rxdataF_ext[1][start_symbol*NR_NB_SC_PER_RB * pusch_pdu->rb_size],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chestF3.m","chF3",
&gNB->pusch_vars[0]->ul_ch_estimates[3][start_symbol*frame_parms->ofdm_symbol_size],frame_parms->ofdm_symbol_size,1,1);
LOG_M("chestF3_ext.m","chF3_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[3][(start_symbol+1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch-1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF2_comp.m","rxsF2_comp",
&gNB->pusch_vars[0]->rxdataF_comp[2][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF0_llrlayers1.m","rxsF0_llrlayers1",
&gNB->pusch_vars[0]->llr_layers[1][0],(nb_symb_sch-1)*NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,1,0);
ul_proc_error = phy_procedures_gNB_uespec_RX(gNB, frame, slot);
if (n_trials == 1 && round == 0) {
LOG_M("rxsig0.m", "rx0", &rxdata[0][slot_offset], slot_length, 1, 1);
LOG_M("rxsigF0.m", "rxsF0", gNB->common_vars.rxdataF[0], 14 * frame_parms->ofdm_symbol_size, 1, 1);
if (precod_nbr_layers > 1) {
LOG_M("rxsig1.m", "rx1", &rxdata[1][slot_offset], slot_length, 1, 1);
LOG_M("rxsigF1.m", "rxsF1", gNB->common_vars.rxdataF[1], 14 * frame_parms->ofdm_symbol_size, 1, 1);
if (precod_nbr_layers == 4) {
LOG_M("rxsig2.m", "rx2", &rxdata[2][slot_offset], slot_length, 1, 1);
LOG_M("rxsig3.m", "rx3", &rxdata[3][slot_offset], slot_length, 1, 1);
LOG_M("rxsigF2.m", "rxsF2", gNB->common_vars.rxdataF[2], 14 * frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("rxsigF3.m", "rxsF3", gNB->common_vars.rxdataF[3], 14 * frame_parms->ofdm_symbol_size, 1, 1);
}
}
}
if (precod_nbr_layers==4) {
LOG_M("rxsigF1_ext.m","rxsF1_ext",
&gNB->pusch_vars[0]->rxdataF_ext[1][start_symbol*NR_NB_SC_PER_RB * pusch_pdu->rb_size],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF2_ext.m","rxsF2_ext",
&gNB->pusch_vars[0]->rxdataF_ext[2][start_symbol*NR_NB_SC_PER_RB * pusch_pdu->rb_size],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF3_ext.m","rxsF3_ext",
&gNB->pusch_vars[0]->rxdataF_ext[3][start_symbol*NR_NB_SC_PER_RB * pusch_pdu->rb_size],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chestF5.m","chF5",
&gNB->pusch_vars[0]->ul_ch_estimates[5][start_symbol*frame_parms->ofdm_symbol_size],frame_parms->ofdm_symbol_size,1,1);
LOG_M("chestF10.m","chF10",
&gNB->pusch_vars[0]->ul_ch_estimates[10][start_symbol*frame_parms->ofdm_symbol_size],frame_parms->ofdm_symbol_size,1,1);
LOG_M("chestF15.m","chF15",
&gNB->pusch_vars[0]->ul_ch_estimates[15][start_symbol*frame_parms->ofdm_symbol_size],frame_parms->ofdm_symbol_size,1,1);
LOG_M("chestF5_ext.m","chF5_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[5][(start_symbol+1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch-1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chestF10_ext.m","chF10_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[10][(start_symbol+1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch-1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("chestF15_ext.m","chF15_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[15][(start_symbol+1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch-1)*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF4_comp.m","rxsF4_comp",
&gNB->pusch_vars[0]->rxdataF_comp[4][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF8_comp.m","rxsF8_comp",
&gNB->pusch_vars[0]->rxdataF_comp[8][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF12_comp.m","rxsF12_comp",
&gNB->pusch_vars[0]->rxdataF_comp[12][start_symbol*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size))],nb_symb_sch*(off+(NR_NB_SC_PER_RB * pusch_pdu->rb_size)),1,1);
LOG_M("rxsigF0_llrlayers1.m","rxsF0_llrlayers1",
&gNB->pusch_vars[0]->llr_layers[1][0],(nb_symb_sch-1)*NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,1,0);
LOG_M("rxsigF0_llrlayers2.m","rxsF0_llrlayers2",
&gNB->pusch_vars[0]->llr_layers[2][0],(nb_symb_sch-1)*NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,1,0);
LOG_M("rxsigF0_llrlayers3.m","rxsF0_llrlayers3",
&gNB->pusch_vars[0]->llr_layers[3][0],(nb_symb_sch-1)*NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,1,0);
}
if (n_trials == 1 && round == 0) {
__attribute__((unused)) int off = ((nb_rb & 1) == 1) ? 4 : 0;
LOG_M("rxsigF0_ext.m",
"rxsF0_ext",
&gNB->pusch_vars[0]->rxdataF_ext[0][start_symbol * NR_NB_SC_PER_RB * pusch_pdu->rb_size],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chestF0.m", "chF0", &gNB->pusch_vars[0]->ul_ch_estimates[0][start_symbol * frame_parms->ofdm_symbol_size], frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("chestT0.m", "chT0", &gNB->pusch_vars[0]->ul_ch_estimates_time[0][0], frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("chestF0_ext.m",
"chF0_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[0][(start_symbol + 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch - 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF0_comp.m",
"rxsF0_comp",
&gNB->pusch_vars[0]->rxdataF_comp[0][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chmagF0.m",
"chmF0",
&gNB->pusch_vars[0]->ul_ch_mag[0][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chmagbF0.m",
"chmbF0",
&gNB->pusch_vars[0]->ul_ch_magb[0][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF0_llrlayers0.m", "rxsF0_llrlayers0", &gNB->pusch_vars[0]->llr_layers[0][0], (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order, 1, 0);
if (precod_nbr_layers == 2) {
LOG_M("rxsigF1_ext.m",
"rxsF1_ext",
&gNB->pusch_vars[0]->rxdataF_ext[1][start_symbol * NR_NB_SC_PER_RB * pusch_pdu->rb_size],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chestF3.m", "chF3", &gNB->pusch_vars[0]->ul_ch_estimates[3][start_symbol * frame_parms->ofdm_symbol_size], frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("chestF3_ext.m",
"chF3_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[3][(start_symbol + 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch - 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF2_comp.m",
"rxsF2_comp",
&gNB->pusch_vars[0]->rxdataF_comp[2][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF0_llrlayers1.m", "rxsF0_llrlayers1", &gNB->pusch_vars[0]->llr_layers[1][0], (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order, 1, 0);
}
LOG_M("rxsigF0_llr.m","rxsF0_llr",
&gNB->pusch_vars[0]->llr[0],precod_nbr_layers*(nb_symb_sch-1)*NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,1,0);
}
////////////////////////////////////////////////////////////
if (precod_nbr_layers == 4) {
LOG_M("rxsigF1_ext.m",
"rxsF1_ext",
&gNB->pusch_vars[0]->rxdataF_ext[1][start_symbol * NR_NB_SC_PER_RB * pusch_pdu->rb_size],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF2_ext.m",
"rxsF2_ext",
&gNB->pusch_vars[0]->rxdataF_ext[2][start_symbol * NR_NB_SC_PER_RB * pusch_pdu->rb_size],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF3_ext.m",
"rxsF3_ext",
&gNB->pusch_vars[0]->rxdataF_ext[3][start_symbol * NR_NB_SC_PER_RB * pusch_pdu->rb_size],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chestF5.m", "chF5", &gNB->pusch_vars[0]->ul_ch_estimates[5][start_symbol * frame_parms->ofdm_symbol_size], frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("chestF10.m", "chF10", &gNB->pusch_vars[0]->ul_ch_estimates[10][start_symbol * frame_parms->ofdm_symbol_size], frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("chestF15.m", "chF15", &gNB->pusch_vars[0]->ul_ch_estimates[15][start_symbol * frame_parms->ofdm_symbol_size], frame_parms->ofdm_symbol_size, 1, 1);
LOG_M("chestF5_ext.m",
"chF5_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[5][(start_symbol + 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch - 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chestF10_ext.m",
"chF10_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[10][(start_symbol + 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch - 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("chestF15_ext.m",
"chF15_ext",
&gNB->pusch_vars[0]->ul_ch_estimates_ext[15][(start_symbol + 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
(nb_symb_sch - 1) * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF4_comp.m",
"rxsF4_comp",
&gNB->pusch_vars[0]->rxdataF_comp[4][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF8_comp.m",
"rxsF8_comp",
&gNB->pusch_vars[0]->rxdataF_comp[8][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF12_comp.m",
"rxsF12_comp",
&gNB->pusch_vars[0]->rxdataF_comp[12][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1);
LOG_M("rxsigF0_llrlayers1.m", "rxsF0_llrlayers1", &gNB->pusch_vars[0]->llr_layers[1][0], (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order, 1, 0);
LOG_M("rxsigF0_llrlayers2.m", "rxsF0_llrlayers2", &gNB->pusch_vars[0]->llr_layers[2][0], (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order, 1, 0);
LOG_M("rxsigF0_llrlayers3.m", "rxsF0_llrlayers3", &gNB->pusch_vars[0]->llr_layers[3][0], (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order, 1, 0);
}
if ((gNB->ulsch[0]->last_iteration_cnt >=
gNB->ulsch[0]->max_ldpc_iterations+1) || ul_proc_error == 1) {
error_flag = 1;
n_errors[round][snrRun]++;
crc_status = 1;
} else
crc_status = 0;
if(n_trials==1) printf("end of round %d rv_index %d\n",round, rv_index);
//----------------------------------------------------------
//----------------- count and print errors -----------------
//----------------------------------------------------------
if ((pusch_pdu->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) && (SNR==snr0) && (trial==0) && (round==0)) {
ptrs_symbols = 0;
for (int i = pusch_pdu->start_symbol_index; i < pusch_pdu->start_symbol_index + pusch_pdu->nr_of_symbols; i++)
ptrs_symbols += ((gNB->pusch_vars[UE_id]->ptrs_symbols) >> i) & 1;
/* 2*5*(50/2), for RB = 50,K = 2 for 5 OFDM PTRS symbols */
available_bits -= 2 * ptrs_symbols * ((nb_rb + ptrs_freq_density - 1) /ptrs_freq_density);
printf("[ULSIM][PTRS] Available bits are: %5u, removed PTRS bits are: %5d \n",available_bits, (ptrsSymbPerSlot * ptrsRePerSymb * 2) );
}
LOG_M("rxsigF0_llr.m", "rxsF0_llr", &gNB->pusch_vars[0]->llr[0], precod_nbr_layers * (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order, 1, 0);
}
for (i = 0; i < available_bits; i++) {
if ((gNB->ulsch[0]->last_iteration_cnt >= gNB->ulsch[0]->max_ldpc_iterations + 1) || ul_proc_error == 1) {
error_flag = 1;
n_errors[round]++;
crc_status = 1;
} else
crc_status = 0;
if (n_trials == 1)
printf("end of round %d rv_index %d\n", round, rv_index);
//----------------------------------------------------------
//----------------- count and print errors -----------------
//----------------------------------------------------------
if ((pusch_pdu->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) && (SNR == snr0) && (trial == 0) && (round == 0)) {
ptrs_symbols = 0;
for (int i = pusch_pdu->start_symbol_index; i < pusch_pdu->start_symbol_index + pusch_pdu->nr_of_symbols; i++)
ptrs_symbols += ((gNB->pusch_vars[UE_id]->ptrs_symbols) >> i) & 1;
/* 2*5*(50/2), for RB = 50,K = 2 for 5 OFDM PTRS symbols */
available_bits -= 2 * ptrs_symbols * ((nb_rb + ptrs_freq_density - 1) / ptrs_freq_density);
printf("[ULSIM][PTRS] Available bits are: %5u, removed PTRS bits are: %5d \n", available_bits, (ptrsSymbPerSlot * ptrsRePerSymb * 2));
}
if(((ulsch_ue->harq_processes[harq_pid]->f[i] == 0) && (gNB->pusch_vars[UE_id]->llr[i] <= 0)) ||
((ulsch_ue->harq_processes[harq_pid]->f[i] == 1) && (gNB->pusch_vars[UE_id]->llr[i] >= 0))) {
for (i = 0; i < available_bits; i++) {
if (((ulsch_ue->harq_processes[harq_pid]->f[i] == 0) && (gNB->pusch_vars[UE_id]->llr[i] <= 0))
|| ((ulsch_ue->harq_processes[harq_pid]->f[i] == 1) && (gNB->pusch_vars[UE_id]->llr[i] >= 0))) {
/*if(errors_scrambling == 0)
printf("\x1B[34m" "[frame %d][trial %d]\t1st bit in error in unscrambling = %d\n" "\x1B[0m", frame, trial, i);*/
errors_scrambling[round]++;
}
}
round++;
} // round
/*if(errors_scrambling == 0)
printf("\x1B[34m" "[frame %d][trial %d]\t1st bit in error in unscrambling = %d\n" "\x1B[0m", frame, trial, i);*/
errors_scrambling[round][snrRun]++;
if (n_trials == 1 && errors_scrambling[0] > 0) {
printf("\x1B[31m""[frame %d][trial %d]\tnumber of errors in unscrambling = %u\n" "\x1B[0m", frame, trial, errors_scrambling[0]);
}
}
round++;
} // round
if (n_trials == 1 && errors_scrambling[0][snrRun] > 0) {
printf("\x1B[31m""[frame %d][trial %d]\tnumber of errors in unscrambling = %u\n" "\x1B[0m", frame, trial, errors_scrambling[0][snrRun]);
}
for (i = 0; i < TBS; i++) {
for (i = 0; i < TBS; i++) {
estimated_output_bit[i] = (ulsch_gNB->harq_processes[harq_pid]->b[i/8] & (1 << (i & 7))) >> (i & 7);
test_input_bit[i] = (ulsch_ue->harq_processes[harq_pid]->b[i/8] & (1 << (i & 7))) >> (i & 7);
estimated_output_bit[i] = (ulsch_gNB->harq_processes[harq_pid]->b[i / 8] & (1 << (i & 7))) >> (i & 7);
test_input_bit[i] = (ulsch_ue->harq_processes[harq_pid]->b[i / 8] & (1 << (i & 7))) >> (i & 7);
if (estimated_output_bit[i] != test_input_bit[i]) {
/*if(errors_decoding == 0)
printf("\x1B[34m""[frame %d][trial %d]\t1st bit in error in decoding = %d\n" "\x1B[0m", frame, trial, i);*/
errors_decoding++;
if (estimated_output_bit[i] != test_input_bit[i]) {
/*if(errors_decoding == 0)
printf("\x1B[34m""[frame %d][trial %d]\t1st bit in error in decoding = %d\n" "\x1B[0m", frame, trial, i);*/
errors_decoding++;
}
}
}
if (n_trials == 1) {
for (int r=0;r<ulsch_ue->harq_processes[harq_pid]->C;r++)
for (int i=0;i<ulsch_ue->harq_processes[harq_pid]->K>>3;i++) {
if ((ulsch_ue->harq_processes[harq_pid]->c[r][i]^ulsch_gNB->harq_processes[harq_pid]->c[r][i]) != 0) printf("************");
/*printf("r %d: in[%d] %x, out[%d] %x (%x)\n",r,
i,ulsch_ue->harq_processes[harq_pid]->c[r][i],
i,ulsch_gNB->harq_processes[harq_pid]->c[r][i],
ulsch_ue->harq_processes[harq_pid]->c[r][i]^ulsch_gNB->harq_processes[harq_pid]->c[r][i]);*/
}
}
if (errors_decoding > 0 && error_flag == 0) {
n_false_positive++;
if (n_trials==1)
printf("\x1B[31m""[frame %d][trial %d]\tnumber of errors in decoding = %u\n" "\x1B[0m", frame, trial, errors_decoding);
}
roundStats[snrRun] += ((float)round);
if (!crc_status) effRate[snrRun] += ((double)TBS)/(double)round;
if (n_trials == 1) {
for (int r = 0; r < ulsch_ue->harq_processes[harq_pid]->C; r++)
for (int i = 0; i < ulsch_ue->harq_processes[harq_pid]->K >> 3; i++) {
if ((ulsch_ue->harq_processes[harq_pid]->c[r][i] ^ ulsch_gNB->harq_processes[harq_pid]->c[r][i]) != 0)
printf("************");
/*printf("r %d: in[%d] %x, out[%d] %x (%x)\n",r,
i,ulsch_ue->harq_processes[harq_pid]->c[r][i],
i,ulsch_gNB->harq_processes[harq_pid]->c[r][i],
ulsch_ue->harq_processes[harq_pid]->c[r][i]^ulsch_gNB->harq_processes[harq_pid]->c[r][i]);*/
}
}
if (errors_decoding > 0 && error_flag == 0) {
n_false_positive++;
if (n_trials==1)
printf("\x1B[31m""[frame %d][trial %d]\tnumber of errors in decoding = %u\n" "\x1B[0m", frame, trial, errors_decoding);
}
roundStats += ((float)round);
if (!crc_status)
effRate += ((double)TBS) / (double)round;
} // trial loop
roundStats[snrRun]/=((float)n_trials);
effRate[snrRun] /= (double)n_trials;
roundStats/=((float)n_trials);
effRate /= (double)n_trials;
printf("*****************************************\n");
printf("SNR %f: n_errors (%d/%d", SNR, n_errors[0][snrRun], round_trials[0][snrRun]);
printf("SNR %f: n_errors (%d/%d", SNR, n_errors[0], round_trials[0]);
for (int r = 1; r < max_rounds; r++)
printf(",%d/%d", n_errors[r][snrRun], round_trials[r][snrRun]);
printf(",%d/%d", n_errors[r], round_trials[r]);
printf(") (negative CRC), false_positive %d/%d, errors_scrambling (%u/%u",
n_false_positive, n_trials, errors_scrambling[0][snrRun], available_bits*n_trials);
n_false_positive, n_trials, errors_scrambling[0], available_bits * n_trials);
for (int r = 1; r < max_rounds; r++)
printf(",%u/%u", errors_scrambling[r][snrRun], available_bits*n_trials);
printf(",%u/%u", errors_scrambling[r], available_bits * n_trials);
printf(")\n");
printf("\n");
for (int r = 0; r < max_rounds; r++) {
blerStats[r][snrRun] = (double)n_errors[r][snrRun]/round_trials[r][snrRun];
berStats[r][snrRun] = (double)errors_scrambling[r][snrRun]/available_bits/round_trials[r][snrRun];
blerStats[r] = (double)n_errors[r] / round_trials[r];
berStats[r] = (double)errors_scrambling[r] / available_bits/round_trials[r];
}
effTP[snrRun] = effRate[snrRun]/(double)TBS*(double)100;
printf("SNR %f: Channel BLER (%e", SNR, blerStats[0][snrRun]);
effTP = effRate/(double)TBS * (double)100;
printf("SNR %f: Channel BLER (%e", SNR, blerStats[0]);
for (int r = 1; r < max_rounds; r++)
printf(",%e", blerStats[r][snrRun]);
printf(" Channel BER (%e", berStats[0][snrRun]);
printf(",%e", blerStats[r]);
printf(" Channel BER (%e", berStats[0]);
for (int r = 1; r < max_rounds; r++)
printf(",%e", berStats[r][snrRun]);
printf(") Avg round %.2f, Eff Rate %.4f bits/slot, Eff Throughput %.2f, TBS %u bits/slot\n",
roundStats[snrRun],effRate[snrRun],effTP[snrRun],TBS);
printf(",%e", berStats[r]);
printf(") Avg round %.2f, Eff Rate %.4f bits/slot, Eff Throughput %.2f, TBS %u bits/slot\n", roundStats,effRate,effTP,TBS);
FILE *fd=fopen("nr_ulsim.log","w");
if (fd == NULL) {
......@@ -1600,19 +1616,16 @@ int main(int argc, char **argv)
if(n_trials==1)
break;
if ((float)effTP[snrRun] >= eff_tp_check) {
if ((float)effTP >= eff_tp_check) {
printf("*************\n");
printf("PUSCH test OK\n");
printf("*************\n");
ret = 0;
break;
}
snrStats[snrRun] = SNR;
snrRun++;
} // SNR loop
printf("\n");
printf("\n");
printf( "Num RB:\t%d\n"
"Num symbols:\t%d\n"
"MCS:\t%d\n"
......@@ -1630,19 +1643,6 @@ int main(int argc, char **argv)
length_dmrs,
num_dmrs_cdm_grps_no_data);
char opStatsFile[50];
sprintf(opStatsFile, "ulsimStats_z%d.m", n_rx);
LOG_M(opStatsFile,"SNR",snrStats,snrRun,1,7);
for (uint8_t r = 0; r < max_rounds; r++) {
char bler[15], ber[15];
sprintf(bler, "BLER_round%d", r);
sprintf(bler, "BER_round%d", r);
LOG_MM(opStatsFile,bler,blerStats[r],snrRun,1,7);
LOG_MM(opStatsFile,ber,berStats[r],snrRun,1,7);
}
LOG_MM(opStatsFile,"EffRate",effRate,snrRun,1,7);
LOG_MM(opStatsFile,"EffTP",effTP,snrRun,1,7);
free(test_input_bit);
free(estimated_output_bit);
if (gNB->ldpc_offload_flag)
......
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