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nr_pbchsim: added -I option which runs initial synchronization. without, it just runs pbch decoding

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Still a remaining issue with the SNR normalization, way too low to get errors.
This commit is contained in:
Raymond Knopp
2018-10-25 22:50:35 +02:00
parent 8d78c0c98f
commit d7c71252f0
13 changed files with 130 additions and 78 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/CODING/nrPolar_tools/nr_polar_decoder.c
+11 -3
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@@ -1069,9 +1069,17 @@ int8_t polar_decoder_int16(int16_t *input,
nr_polar_deinterleaver(polarParams->nr_polar_CPrime, polarParams->nr_polar_B, polarParams->interleaving_pattern, polarParams->K);
//Remove the CRC (â)
for (int j = 0; j < polarParams->payloadBits; j++) polarParams->nr_polar_A[j]=polarParams->nr_polar_B[j];
//for (int j = 0; j < polarParams->payloadBits; j++) polarParams->nr_polar_A[j]=polarParams->nr_polar_B[j];
nr_byte2bit_uint8_32_t(polarParams->nr_polar_A, polarParams->payloadBits, out);
// Check the CRC
for (int j=0;j<polarParams->crcParityBits;j++) {
int crcbit=0;
for (int i=0;i<polarParams->payloadBits;i++)
crcbit = crcbit ^ (polarParams->crc_generator_matrix[i][j] & polarParams->nr_polar_B[i]);
if (crcbit != polarParams->nr_polar_B[polarParams->payloadBits+j]) return(-1);
}
// pack into ceil(payloadBits/32) 32 bit words, lowest index in MSB
// nr_byte2bit_uint8_32_t(polarParams->nr_polar_A, polarParams->payloadBits, out);
nr_byte2bit_uint8_32_t(polarParams->nr_polar_B, polarParams->payloadBits, out);
return(0);
}
openair1/PHY/CODING/nrPolar_tools/nr_polar_decoding_tools.c
+1 -1
View File
@@ -443,7 +443,7 @@ void applyGtoright(t_nrPolar_params *pp,decoder_node_t *node) {
}
else
#endif
{// equvalent scalar code to above, activated only on non x86/ARM architectures
{// equvalent scalar code to above, activated only on non x86/ARM architectures or Nv=1,2
for (int i=0;i<node->Nv/2;i++) {
alpha_r[i] = alpha_v[i+(node->Nv/2)] - (betal[i]*alpha_v[i]);
}
openair1/PHY/CODING/nrPolar_tools/nr_polar_defs.h
+6 -4
View File
@@ -361,11 +361,13 @@ static inline void nr_polar_interleaver(uint8_t *input,
}
static inline void nr_polar_deinterleaver(uint8_t *input,
uint8_t *output,
uint16_t *pattern,
uint16_t size)
uint8_t *output,
uint16_t *pattern,
uint16_t size)
{
for (int i=0; i<size; i++) output[pattern[i]]=input[i];
for (int i=0; i<size; i++) {
output[pattern[i]]=input[i];
}
}
#endif
openair1/PHY/CODING/nrPolar_tools/nr_polar_encoder.c
+1 -1
View File
@@ -54,7 +54,7 @@ void polar_encoder(uint32_t *in,
polarParams->nr_polar_crc,
polarParams->payloadBits,
polarParams->crcParityBits);
for (uint8_t i = 0; i < polarParams->crcParityBits; i++)
for (uint8_t i = 0; i < polarParams->crcParityBits; i++)
polarParams->nr_polar_crc[i] = (polarParams->nr_polar_crc[i] % 2);
//Attach CRC to the Transport Block. (a to b)
openair1/PHY/MODULATION/slot_fep_nr.c
+2 -2
View File
@@ -199,9 +199,9 @@ int nr_slot_fep(PHY_VARS_NR_UE *ue,
switch(channel){
case NR_PBCH_EST:
//#ifdef DEBUG_FEP
#ifdef DEBUG_FEP
printf("Channel estimation eNB %d, slot %d, symbol %d\n",eNB_id,Ns,l);
//#endif
#endif
#if UE_TIMING_TRACE
start_meas(&ue->dlsch_channel_estimation_stats);
#endif
openair1/PHY/NR_REFSIG/nr_dmrs_rx.c
+1 -1
View File
@@ -233,7 +233,7 @@ int nr_pbch_dmrs_rx(int symbol,unsigned int *nr_gold_pbch,int32_t *output )
m0=84;
m1=144;
}
printf("Generating pilots symbol %d, m0 %d, m1 %d\n",symbol,m0,m1);
// printf("Generating pilots symbol %d, m0 %d, m1 %d\n",symbol,m0,m1);
/// QPSK modulation
for (m=m0; m<m1; m++) {
idx = ((((nr_gold_pbch[(m<<1)>>5])>>((m<<1)&0x1f))&1)<<1) ^ (((nr_gold_pbch[((m<<1)+1)>>5])>>(((m<<1)+1)&0x1f))&1);
openair1/PHY/NR_TRANSPORT/nr_pbch.c
+3 -3
View File
@@ -37,7 +37,7 @@
//#define DEBUG_PBCH
//#define DEBUG_PBCH_ENCODING
#define DEBUG_PBCH_DMRS
//#define DEBUG_PBCH_DMRS
//extern short nr_mod_table[NR_MOD_TABLE_SIZE_SHORT];
#include "PHY/NR_REFSIG/nr_mod_table.h"
@@ -55,7 +55,7 @@ int nr_generate_pbch_dmrs(uint32_t *gold_pbch_dmrs,
uint8_t idx=0;
uint8_t nushift = config->sch_config.physical_cell_id.value &3;
LOG_I(PHY, "PBCH DMRS mapping started at symbol %d shift %d\n", ssb_start_symbol+1, nushift);
LOG_D(PHY, "PBCH DMRS mapping started at symbol %d shift %d\n", ssb_start_symbol+1, nushift);
/// QPSK modulation
for (int m=0; m<NR_PBCH_DMRS_LENGTH; m++) {
@@ -233,7 +233,7 @@ int nr_generate_pbch(NR_gNB_PBCH *pbch,
memset((void*) xbyte, 0, 1);
//uint8_t pbch_a_b[32];
LOG_I(PHY, "PBCH generation started\n");
// LOG_D(PHY, "PBCH generation started\n");
memset((void*)pbch, 0, sizeof(NR_gNB_PBCH));
///Payload generation
openair1/PHY/NR_TRANSPORT/nr_pss.c
+2 -2
View File
@@ -22,7 +22,7 @@
#include "PHY/NR_TRANSPORT/nr_transport.h"
#define NR_PSS_DEBUG
//#define NR_PSS_DEBUG
int nr_generate_pss( int16_t *d_pss,
int32_t **txdataF,
@@ -69,7 +69,7 @@ int nr_generate_pss( int16_t *d_pss,
l = ssb_start_symbol;
for (m = 0; m < NR_PSS_LENGTH; m++) {
printf("pss: writing position k %d / %d\n",k,frame_parms->ofdm_symbol_size);
// printf("pss: writing position k %d / %d\n",k,frame_parms->ofdm_symbol_size);
((int16_t*)txdataF[aa])[2*(l*frame_parms->ofdm_symbol_size + k)] = (a * d_pss[m]) >> 15;
k++;
openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+1 -1
View File
@@ -67,7 +67,7 @@ int nr_pbch_channel_estimation(PHY_VARS_NR_UE *ue,
ch_offset = ue->frame_parms.ofdm_symbol_size*symbol;
AssertFatal((symbol > 0 && symbol < 4 && ue->is_synchronized == 0) ||
(symbol > 0 && symbol < 4 && ue->is_synchronized == 0),
(symbol > 4 && symbol < 8 && ue->is_synchronized == 1),
"symbol %d is illegal for PBCH DM-RS (is_synchronized %d)\n",
symbol,ue->is_synchronized);
openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c
-2
View File
@@ -53,7 +53,6 @@ int cnt=0;
int nr_pbch_detection(PHY_VARS_NR_UE *ue, runmode_t mode)
{
printf("nr pbch detec RB_DL %d\n", ue->frame_parms.N_RB_DL);
NR_DL_FRAME_PARMS *frame_parms=&ue->frame_parms;
int ret =-1;
@@ -96,7 +95,6 @@ int nr_pbch_detection(PHY_VARS_NR_UE *ue, runmode_t mode)
//put back nb_prefix_samples0
frame_parms->nb_prefix_samples0 = nb_prefix_samples0;
printf("pbch_detection nid_cell %d\n",frame_parms->Nid_cell);
ret = nr_rx_pbch(ue,
&ue->proc.proc_rxtx[0],
openair1/PHY/NR_UE_TRANSPORT/nr_pbch.c
+33 -34
View File
@@ -65,22 +65,21 @@ uint16_t nr_pbch_extract(int **rxdataF,
unsigned int rx_offset = frame_parms->first_carrier_offset + frame_parms->ssb_start_subcarrier; //and
if (rx_offset>= frame_parms->ofdm_symbol_size) rx_offset-=frame_parms->ofdm_symbol_size;
int s_offset;
int s_offset=0;
AssertFatal(((symbol>=1) && (symbol<5) && (is_synchronized==0)) ||
((symbol>=5) && (symbol<8) && (is_synchronized==1)),
"symbol %d illegal for PBCH (is_synchronized %d)\n",
symbol,is_synchronized);
AssertFatal(symbol>=1 && symbol<5,
"symbol %d illegal for PBCH extraction\n",
symbol);
if (is_synchronized==0) s_offset=4;
if (is_synchronized==1) s_offset=4;
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
rxF = &rxdataF[aarx][symbol*frame_parms->ofdm_symbol_size];
rxF_ext = &rxdataF_ext[aarx][symbol*(20*12)];
rxF = &rxdataF[aarx][(symbol+s_offset)*frame_parms->ofdm_symbol_size];
rxF_ext = &rxdataF_ext[aarx][(symbol+s_offset)*(20*12)];
#ifdef DEBUG_PBCH
printf("extract_rbs (nushift %d): rx_offset=%d, symbol %d\n",frame_parms->nushift,
(rx_offset + (symbol*(frame_parms->ofdm_symbol_size))),symbol);
(rx_offset + ((symbol+s_offset)*(frame_parms->ofdm_symbol_size))),symbol);
int16_t *p = (int16_t *)rxF;
for (int i =0; i<8;i++){
printf("rxF [%d]= %d\n",i,rxF[i]);
@@ -92,7 +91,7 @@ uint16_t nr_pbch_extract(int **rxdataF,
for (rb=0; rb<20; rb++) {
j=0;
if (((s_offset+symbol)==5) || ((s_offset+symbol)==7)) {
if (symbol==1 || symbol==7) {
for (i=0; i<12; i++) {
if ((i!=nushiftmod4) &&
(i!=(nushiftmod4+4)) &&
@@ -138,17 +137,17 @@ uint16_t nr_pbch_extract(int **rxdataF,
}
if (high_speed_flag == 1)
dl_ch0 = &dl_ch_estimates[aarx][(symbol*(frame_parms->ofdm_symbol_size))];
dl_ch0 = &dl_ch_estimates[aarx][((symbol+s_offset)*(frame_parms->ofdm_symbol_size))];
else
dl_ch0 = &dl_ch_estimates[aarx][0];
//printf("dl_ch0 addr %p\n",dl_ch0);
dl_ch0_ext = &dl_ch_estimates_ext[aarx][symbol*(20*12)];
dl_ch0_ext = &dl_ch_estimates_ext[aarx][(symbol+s_offset)*(20*12)];
for (rb=0; rb<20; rb++) {
j=0;
if ((s_offset+symbol==5) || (s_offset+symbol==7)) {
if (symbol==1 || symbol==7) {
for (i=0; i<12; i++) {
if ((i!=nushiftmod4) &&
(i!=(nushiftmod4+4)) &&
@@ -291,12 +290,16 @@ void nr_pbch_channel_compensation(int **rxdataF_ext,
#endif
AssertFatal((symbol > 0 && symbol < 4 && is_synchronized == 0) ||
(symbol > 0 && symbol < 4 && is_synchronized == 0),
(symbol > 4 && symbol < 8 && is_synchronized == 1),
"symbol %d is illegal for PBCH DM-RS (is_synchronized %d)\n",
symbol,is_synchronized);
if (symbol == 2 || symbol == 6) nb_re = 72;
// printf("comp: symbol %d : nb_re %d\n",symbol,nb_re);
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
#if defined(__x86_64__) || defined(__i386__)
@@ -313,7 +316,7 @@ void nr_pbch_channel_compensation(int **rxdataF_ext,
#endif
for (int re=0; re<nb_re; re+=12) {
// printf("******re %d\n",re);
// printf("******re %d\n",re);
#if defined(__x86_64__) || defined(__i386__)
// multiply by conjugated channel
mmtmpP0 = _mm_madd_epi16(dl_ch128[0],rxdataF128[0]);
@@ -443,7 +446,6 @@ void nr_pbch_unscrambling(NR_UE_PBCH *pbch,
uint32_t unscrambling_mask = 0x100006D;
printf("unscramb nid_cell %d\n",Nid);
reset = 1;
// x1 is set in first call to lte_gold_generic
@@ -492,10 +494,10 @@ void nr_pbch_quantize(int16_t *pbch_llr8,
uint16_t i;
for (i=0; i<len; i++) {
if (pbch_llr[i]>127)
pbch_llr8[i]=127;
else if (pbch_llr[i]<-128)
pbch_llr8[i]=-128;
if (pbch_llr[i]>31)
pbch_llr8[i]=32;
else if (pbch_llr[i]<-31)
pbch_llr8[i]=-32;
else
pbch_llr8[i] = (char)(pbch_llr[i]);
@@ -548,8 +550,6 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
int subframe_rx = proc->subframe_rx;
printf("ue->current_thread_id[subframe_rx] %d subframe_rx %d\n",ue->current_thread_id[subframe_rx], subframe_rx);
pbch_e_rx = &nr_ue_pbch_vars->llr[0];
// clear LLR buffer
@@ -571,7 +571,7 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
nr_ue_common_vars->common_vars_rx_data_per_thread[ue->current_thread_id[subframe_rx]].dl_ch_estimates[eNB_id],
nr_ue_pbch_vars->rxdataF_ext,
nr_ue_pbch_vars->dl_ch_estimates_ext,
symbol,
symbol-first_symbol+1,
high_speed_flag,
ue->is_synchronized,
frame_parms);
@@ -664,7 +664,7 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
decoderState = polar_decoder_int16(pbch_e_rx,&nr_ue_pbch_vars->pbch_a_prime,currentPtr);
printf("polar decoder state %d\n", decoderState);
if(decoderState == -1)
return(decoderState);
@@ -674,7 +674,6 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
memset(&nr_ue_pbch_vars->pbch_a_interleaved, 0, sizeof(uint32_t) );
M = (Lmax == 64)? (NR_POLAR_PBCH_PAYLOAD_BITS - 6) : (NR_POLAR_PBCH_PAYLOAD_BITS - 3);
nushift = ((nr_ue_pbch_vars->pbch_a_prime>>6)&1) ^ (((nr_ue_pbch_vars->pbch_a_prime>>24)&1)<<1);
printf("payload unscrambling nushift %d sfn3 %d sfn2 %d M %d\n",nushift, ((nr_ue_pbch_vars->pbch_a_prime>>6)&1),((nr_ue_pbch_vars->pbch_a_prime>>24)&1),M);
nr_pbch_unscrambling(nr_ue_pbch_vars,frame_parms->Nid_cell,nushift,M,NR_POLAR_PBCH_PAYLOAD_BITS,1);
//payload deinterleaving
@@ -684,31 +683,31 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
for (int i=0; i<32; i++) {
out |= ((nr_ue_pbch_vars->pbch_a_interleaved>>i)&1)<<(pbch_deinterleaving_pattern[i]);
#ifdef DEBUG_PBCH
// printf("i %d in 0x%08x out 0x%08x ilv %d (in>>i)&1) 0x%08x\n", i, nr_ue_pbch_vars->pbch_a_interleaved, out, pbch_deinterleaving_pattern[i], (in>>i)&1);
printf("i %d in 0x%08x out 0x%08x ilv %d (in>>i)&1) 0x%08x\n", i, nr_ue_pbch_vars->pbch_a_interleaved, out, pbch_deinterleaving_pattern[i], (nr_ue_pbch_vars->pbch_a_interleaved>>i)&1);
#endif
}
for (int i=0; i<NR_POLAR_PBCH_PAYLOAD_BITS>>3; i++)
pbch_a[i] = (uint8_t)((out>>(i<<3))&0xff);
decoded_output[i] = (uint8_t)((out>>(i<<3))&0xff);
// Fix byte endian
for (i=0; i<(NR_POLAR_PBCH_PAYLOAD_BITS>>3); i++)
decoded_output[(NR_POLAR_PBCH_PAYLOAD_BITS>>3)-i-1] = pbch_a[i];
// for (i=0; i<(NR_POLAR_PBCH_PAYLOAD_BITS>>3); i++)
// decoded_output[(NR_POLAR_PBCH_PAYLOAD_BITS>>3)-i-1] = pbch_a[i];
//#ifdef DEBUG_PBCH
#ifdef DEBUG_PBCH
for (i=0; i<(NR_POLAR_PBCH_PAYLOAD_BITS>>3); i++){
//printf("unscrambling pbch_a[%d] = %x \n", i,pbch_a[i]);
// printf("unscrambling pbch_a[%d] = %x \n", i,pbch_a[i]);
printf("[PBCH] decoder payload[%d] = %x\n",i,decoded_output[i]);
}
//#endif
#endif
ue->dl_indication.rx_ind = &ue->rx_ind; // hang on rx_ind instance
//ue->rx_ind.sfn_slot = 0; //should be set by higher-1-layer, i.e. clean_and_set_if_instance()
ue->rx_ind.number_pdus = ue->rx_ind.number_pdus + 1;
ue->rx_ind.rx_indication_body = (fapi_nr_rx_indication_body_t *)malloc(sizeof(fapi_nr_rx_indication_body_t));
ue->rx_ind.rx_indication_body->pdu_type = FAPI_NR_RX_PDU_TYPE_MIB;
ue->rx_ind.rx_indication_body->mib_pdu.pdu = &decoded_output[1];
ue->rx_ind.rx_indication_body->mib_pdu.additional_bits = decoded_output[0];
ue->rx_ind.rx_indication_body->mib_pdu.pdu = &decoded_output[0];
ue->rx_ind.rx_indication_body->mib_pdu.additional_bits = decoded_output[3];
ue->rx_ind.rx_indication_body->mib_pdu.ssb_index = ssb_index; // confirm with TCL
ue->rx_ind.rx_indication_body->mib_pdu.ssb_length = Lmax; // confirm with TCL
ue->rx_ind.rx_indication_body->mib_pdu.cell_id = frame_parms->Nid_cell; // confirm with TCL
openair1/SCHED_NR/phy_procedures_nr_gNB.c
+4 -4
View File
@@ -113,7 +113,7 @@ void nr_set_ssb_first_subcarrier(nfapi_nr_config_request_t *cfg, NR_DL_FRAME_PAR
{
int start_rb = cfg->sch_config.n_ssb_crb.value / (1<<cfg->subframe_config.numerology_index_mu.value);
fp->ssb_start_subcarrier = 12 * start_rb + cfg->sch_config.ssb_subcarrier_offset.value;
LOG_I(PHY, "SSB first subcarrier %d (%d,%d)\n", fp->ssb_start_subcarrier,start_rb,cfg->sch_config.ssb_subcarrier_offset.value);
LOG_D(PHY, "SSB first subcarrier %d (%d,%d)\n", fp->ssb_start_subcarrier,start_rb,cfg->sch_config.ssb_subcarrier_offset.value);
}
void nr_common_signal_procedures (PHY_VARS_gNB *gNB,int frame, int subframe) {
@@ -135,13 +135,13 @@ void nr_common_signal_procedures (PHY_VARS_gNB *gNB,int frame, int subframe) {
if (subframe == ss_subframe)
{
// Current implementation is based on SSB in first half frame, first candidate
LOG_I(PHY,"SS TX: frame %d, subframe %d, start_symbol %d\n",frame,subframe, ssb_start_symbol);
LOG_D(PHY,"SS TX: frame %d, subframe %d, start_symbol %d\n",frame,subframe, ssb_start_symbol);
nr_generate_pss(gNB->d_pss, txdataF, AMP, ssb_start_symbol, cfg, fp);
nr_generate_sss(gNB->d_sss, txdataF, AMP_OVER_2, ssb_start_symbol, cfg, fp);
if (!(frame&7)){
LOG_I(PHY,"%d.%d : pbch_configured %d\n",frame,subframe,gNB->pbch_configured);
LOG_D(PHY,"%d.%d : pbch_configured %d\n",frame,subframe,gNB->pbch_configured);
if (gNB->pbch_configured != 1)return;
gNB->pbch_configured = 0;
}
@@ -183,7 +183,7 @@ void phy_procedures_gNB_TX(PHY_VARS_gNB *gNB,
num_dci = gNB->pdcch_vars.num_dci;
if (num_dci) {
LOG_I(PHY, "[gNB %d] Frame %d subframe %d \
LOG_D(PHY, "[gNB %d] Frame %d subframe %d \
Calling nr_generate_dci_top (number of DCI %d)\n", gNB->Mod_id, frame, subframe, num_dci);
uint8_t slot_idx = gNB->pdcch_vars.dci_alloc[0].pdcch_params.first_slot;
openair1/SIMULATION/NR_PHY/pbchsim.c
+65 -20
View File
@@ -118,7 +118,8 @@ int main(int argc, char **argv)
nfapi_nr_config_request_t *gNB_config;
int ret;
int run_initial_sync=0;
cpuf = get_cpu_freq_GHz();
if ( load_configmodule(argc,argv) == 0) {
@@ -128,7 +129,7 @@ int main(int argc, char **argv)
logInit();
randominit(0);
while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:s:S:t:x:y:z:N:F:GR:dP:")) != -1) {
while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:s:S:t:x:y:z:N:F:GR:dP:I")) != -1) {
switch (c) {
case 'f':
write_output_file=1;
@@ -280,7 +281,10 @@ int main(int argc, char **argv)
printf("Illegal PBCH phase (0-3) got %d\n",pbch_phase);
break;
case 'I':
run_initial_sync=1;
break;
default:
case 'h':
printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n",
@@ -400,7 +404,9 @@ int main(int argc, char **argv)
UE = malloc(sizeof(PHY_VARS_NR_UE));
memcpy(&UE->frame_parms,frame_parms,sizeof(NR_DL_FRAME_PARMS));
phy_init_nr_top(UE);
UE->is_synchronized = 0;
if (run_initial_sync==1) UE->is_synchronized = 0;
else UE->is_synchronized = 1;
UE->perfect_ce = 0;
if (init_nr_ue_signal(UE, 1, 0) != 0)
@@ -409,19 +415,19 @@ int main(int argc, char **argv)
exit(-1);
}
nr_gold_pbch(UE);
// generate signal
if (input_fd==NULL) {
gNB->pbch_configured = 1;
for (int i=0;i<4;i++) gNB->pbch_pdu[3-i]=i;
for (int i=0;i<4;i++) gNB->pbch_pdu[i]=i+1;
nr_common_signal_procedures (gNB,frame,subframe);
}
/*
LOG_M("txsigF0.m","txsF0", gNB->common_vars.txdataF[0],frame_length_complex_samples_no_prefix,1,1);
if (gNB->frame_parms.nb_antennas_tx>1)
LOG_M("txsigF1.m","txsF1", gNB->common_vars.txdataF[1],frame_length_complex_samples_no_prefix,1,1);
*/
//TODO: loop over slots
for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) {
if (gNB_config->subframe_config.dl_cyclic_prefix_type.value == 1) {
@@ -438,20 +444,20 @@ int main(int argc, char **argv)
frame_parms);
}
}
/*
LOG_M("txsig0.m","txs0", txdata[0],frame_length_complex_samples,1,1);
if (gNB->frame_parms.nb_antennas_tx>1)
LOG_M("txsig1.m","txs1", txdata[1],frame_length_complex_samples,1,1);
*/
int txlev = signal_energy(&txdata[0][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);
printf("txlev %d\n",txlev);
// printf("txlev %d (%f)\n",txlev,10*log10(txlev));
for (i=0; i<frame_length_complex_samples; i++) {
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)])/sqrt((double)txlev);
r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1])/sqrt((double)txlev);
r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
}
}
@@ -467,15 +473,15 @@ int main(int argc, char **argv)
//multipath_channel(gNB2UE,s_re,s_im,r_re,r_im,frame_length_complex_samples,0);
//AWGN
sigma2_dB = -SNR;
sigma2_dB = 10*log10((double)txlev)-SNR;
sigma2 = pow(10,sigma2_dB/10);
printf("sigma2 %f\n",sigma2);
// printf("sigma2 %f (%f dB)\n",sigma2,sigma2_dB);
for (i=0; i<frame_length_complex_samples; i++) {
for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
((short*) UE->common_vars.rxdata[aa])[2*i] = (short) ((r_re[aa][i] +sqrt(sigma2/2)*gaussdouble(0.0,1.0))*512);
((short*) UE->common_vars.rxdata[aa])[2*i+1] = (short) ((r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0))*512);
((short*) UE->common_vars.rxdata[aa])[2*i] = (short) ((r_re[aa][i] + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
((short*) UE->common_vars.rxdata[aa])[2*i+1] = (short) ((r_im[aa][i] + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
}
}
@@ -484,10 +490,49 @@ int main(int argc, char **argv)
if (gNB->frame_parms.nb_antennas_tx>1)
LOG_M("rxsig1.m","rxs1", UE->common_vars.rxdata[1],frame_length_complex_samples,1,1);
}
if (UE->is_synchronized == 0) {
ret = nr_initial_sync(UE, normal_txrx);
printf("nr_initial_sync1 returns %d\n",ret);
if (ret<0) n_errors++;
}
else {
UE->rx_offset=0;
//symbol 1
nr_slot_fep(UE,
5,
0,
0,
0,
1,
NR_PBCH_EST);
//symbol 2
nr_slot_fep(UE,
6,
0,
0,
0,
1,
NR_PBCH_EST);
//symbol 3
nr_slot_fep(UE,
7,
0,
0,
0,
1,
NR_PBCH_EST);
ret = nr_rx_pbch(UE,
&UE->proc.proc_rxtx[0],
UE->pbch_vars[0],
frame_parms,
0,
SISO,
UE->high_speed_flag);
ret = nr_initial_sync(UE, normal_txrx);
printf("nr_initial_sync1 returns %d\n",ret);
}
} //noise trials
printf("SNR %f : n_errors = %d/%d\n", SNR,n_errors,n_trials);