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change timing advance to only affect the TX timestamp, not the position in the "txdata" buffer

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This commit is contained in:
Thomas Schlichter
2020-08-22 10:21:36 +02:00
parent 1ca238dc19
commit b0903e2079
6 changed files with 24 additions and 110 deletions
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executables/nr-ue.c
+1 -1
View File
@@ -797,7 +797,7 @@ void *UE_thread(void *arg) {
timestamp+
UE->frame_parms.get_samples_slot_timestamp(slot_nr,
&UE->frame_parms,DURATION_RX_TO_TX - RX_NB_TH) - firstSymSamp -
openair0_cfg[0].tx_sample_advance,
openair0_cfg[0].tx_sample_advance - UE->N_TA_offset - UE->timing_advance,
txp,
writeBlockSize,
UE->frame_parms.nb_antennas_tx,
executables/nr-uesoftmodem.c
-6
View File
@@ -767,13 +767,7 @@ int main( int argc, char **argv ) {
for(int CC_id=0; CC_id<MAX_NUM_CCs; CC_id++) {
PHY_vars_UE_g[0][CC_id]->rf_map.card=0;
PHY_vars_UE_g[0][CC_id]->rf_map.chain=CC_id+chain_offset;
#if defined(OAI_USRP) || defined(OAI_ADRV9371_ZC706)
PHY_vars_UE_g[0][CC_id]->hw_timing_advance = timing_advance;
PHY_vars_UE_g[0][CC_id]->timing_advance = timing_advance;
#else
PHY_vars_UE_g[0][CC_id]->hw_timing_advance = 160;
#endif
}
init_NR_UE_threads(1);
openair1/PHY/NR_UE_TRANSPORT/nr_prach.c
+8 -47
View File
@@ -71,7 +71,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
int16_t prach_tmp[98304*2*4] __attribute__((aligned(32)));
int16_t Ncp = 0, amp, *prach, *prach2, *prachF, *Xu;
int32_t Xu_re, Xu_im, samp_count;
int32_t Xu_re, Xu_im;
int prach_start, prach_sequence_length, i, prach_len, dftlen, mu, kbar, K, n_ra_prb, k;
//int restricted_Type;
@@ -103,22 +103,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
nrUE_config->prach_config.num_prach_fd_occasions_list[fd_occasion].prach_root_sequence_index,
ue->X_u);
if (mu == 0)
samp_count = fp->samples_per_subframe;
else
samp_count = (slot%(fp->slots_per_subframe/2)) ? fp->samples_per_slotN0 : fp->samples_per_slot0;
#ifdef OAI_USRP
prach_start = (ue->rx_offset + slot*samp_count - ue->hw_timing_advance - ue->N_TA_offset);
#else //normal case (simulation)
prach_start = slot*samp_count - ue->N_TA_offset;
#endif
if (prach_start<0)
prach_start += (fp->samples_per_subframe*NR_NUMBER_OF_SUBFRAMES_PER_FRAME);
if (prach_start >= (fp->samples_per_subframe*NR_NUMBER_OF_SUBFRAMES_PER_FRAME))
prach_start -= (fp->samples_per_subframe*NR_NUMBER_OF_SUBFRAMES_PER_FRAME);
prach_start = fp->get_samples_slot_timestamp(slot, fp, 0);
// First compute physical root sequence
/************************************************************************
@@ -796,40 +781,16 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
}
#ifdef NR_PRACH_DEBUG
LOG_I(PHY, "PRACH [UE %d] N_RB_UL %d prach_start %d, prach_len %d, rx_offset %d, hw_timing_advance %d, N_TA_offset %d\n", Mod_id,
LOG_I(PHY, "PRACH [UE %d] N_RB_UL %d prach_start %d, prach_len %d\n", Mod_id,
fp->N_RB_UL,
prach_start,
prach_len,
ue->rx_offset,
ue->hw_timing_advance,
ue->N_TA_offset);
prach_len);
#endif
#if defined(OAI_USRP) || defined(OAI_BLADERF) || defined(OAI_LMSSDR)
int j, overflow = prach_start + prach_len - NR_NUMBER_OF_SUBFRAMES_PER_FRAME*fp->samples_per_subframe;
#ifdef NR_PRACH_DEBUG
LOG_I( PHY, "PRACH [UE %d] overflow = %d\n", Mod_id, overflow);
#endif
// prach_start=414.730, overflow=-39470 prach_len=6600 fp->samples_per_subframe*NR_NUMBER_OF_SUBFRAMES_PER_FRAME 460.800 prach_start+prach_len 421.330 fp->samples_per_subframe 46080
// from prach_start=414.730 to prach_start+prach_len 421.330
for (i = prach_start, j = 0; i < min(fp->samples_per_subframe*NR_NUMBER_OF_SUBFRAMES_PER_FRAME, prach_start + prach_len); i++, j++) {
((int16_t*)ue->common_vars.txdata[0])[2*i] = prach[2*j];
((int16_t*)ue->common_vars.txdata[0])[2*i+1] = prach[2*j+1];
}
for (i = 0; i < overflow; i++,j++) {
((int16_t*)ue->common_vars.txdata[0])[2*i] = prach[2*j];
((int16_t*)ue->common_vars.txdata[0])[2*i+1] = prach[2*j+1];
}
#else // simulators
for (i=0; i<prach_len; i++) {
((int16_t*)(&ue->common_vars.txdata[0][prach_start]))[2*i] = prach[2*i];
((int16_t*)(&ue->common_vars.txdata[0][prach_start]))[2*i+1] = prach[2*i+1];
}
#endif
for (i=0; i<prach_len; i++) {
((int16_t*)(&ue->common_vars.txdata[0][prach_start]))[2*i] = prach[2*i];
((int16_t*)(&ue->common_vars.txdata[0][prach_start]))[2*i+1] = prach[2*i+1];
}
//printf("----------------------\n");
//for(int ii = prach_start; ii<2*(prach_start + prach_len); ii++){
openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
+14 -54
View File
@@ -434,22 +434,12 @@ uint8_t nr_ue_pusch_common_procedures(PHY_VARS_NR_UE *UE,
int tx_offset, ap;
int32_t **txdata;
int32_t **txdataF;
int timing_advance;
uint8_t Nl = UE->ulsch[thread_id][gNB_id][0]->harq_processes[harq_pid]->pusch_pdu.nrOfLayers; // cw 0
/////////////////////////IFFT///////////////////////
///////////
#if defined(EXMIMO) || defined(OAI_USRP) || defined(OAI_BLADERF) || defined(OAI_LMSSDR) || defined(OAI_ADRV9371_ZC706)
timing_advance = UE->timing_advance;
#else
timing_advance = 0;
#endif
tx_offset = frame_parms->get_samples_slot_timestamp(slot,frame_parms,0) - timing_advance;
if (tx_offset < 0)
tx_offset += frame_parms->samples_per_frame;
tx_offset = frame_parms->get_samples_slot_timestamp(slot, frame_parms, 0);
// clear the transmit data array for the current subframe
/*for (int aa=0; aa<UE->frame_parms.nb_antennas_tx; aa++) {
@@ -461,49 +451,19 @@ uint8_t nr_ue_pusch_common_procedures(PHY_VARS_NR_UE *UE,
txdata = UE->common_vars.txdata;
txdataF = UE->common_vars.txdataF;
if(UE->N_TA_offset > tx_offset) {
int32_t *tmp_idft_out = (int32_t*)malloc16(frame_parms->get_samples_per_slot(slot, frame_parms) * sizeof(int32_t));
for(ap = 0; ap < Nl; ap++) {
if (frame_parms->Ncp == 1) { // extended cyclic prefix
PHY_ofdm_mod(txdataF[ap],
tmp_idft_out,
frame_parms->ofdm_symbol_size,
12,
frame_parms->nb_prefix_samples,
CYCLIC_PREFIX);
} else { // normal cyclic prefix
nr_normal_prefix_mod(txdataF[ap],
tmp_idft_out,
14,
frame_parms);
}
memcpy((void *) &txdata[ap][frame_parms->samples_per_frame - UE->N_TA_offset + tx_offset],
(void *) tmp_idft_out,
(UE->N_TA_offset - tx_offset) * sizeof(int32_t));
memcpy((void *) &txdata[ap][0],
(void *) &tmp_idft_out[UE->N_TA_offset - tx_offset],
(frame_parms->get_samples_per_slot(slot, frame_parms) - UE->N_TA_offset + tx_offset) * sizeof(int32_t));
}
free(tmp_idft_out);
} else { // UE->N_TA_offset <= tx_offset
for (ap = 0; ap < Nl; ap++) {
if (frame_parms->Ncp == 1) { // extended cyclic prefix
PHY_ofdm_mod(txdataF[ap],
&txdata[ap][tx_offset-UE->N_TA_offset],
frame_parms->ofdm_symbol_size,
12,
frame_parms->nb_prefix_samples,
CYCLIC_PREFIX);
} else { // normal cyclic prefix
nr_normal_prefix_mod(txdataF[ap],
&txdata[ap][tx_offset-UE->N_TA_offset],
14,
frame_parms);
}
for (ap = 0; ap < Nl; ap++) {
if (frame_parms->Ncp == 1) { // extended cyclic prefix
PHY_ofdm_mod(txdataF[ap],
&txdata[ap][tx_offset],
frame_parms->ofdm_symbol_size,
12,
frame_parms->nb_prefix_samples,
CYCLIC_PREFIX);
} else { // normal cyclic prefix
nr_normal_prefix_mod(txdataF[ap],
&txdata[ap][tx_offset],
14,
frame_parms);
}
}
openair1/PHY/defs_nr_UE.h
-1
View File
@@ -1022,7 +1022,6 @@ typedef struct {
/// Timing Advance updates variables
/// Timing advance update computed from the TA command signalled from gNB
int timing_advance;
int hw_timing_advance;
int N_TA_offset; ///timing offset used in TDD
NR_UL_TIME_ALIGNMENT_t ul_time_alignment[NUMBER_OF_CONNECTED_gNB_MAX];
openair1/SIMULATION/NR_PHY/prachsim.c
+1 -1
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@@ -603,7 +603,7 @@ int main(int argc, char **argv){
/* tx_lev_dB not used later, no need to set */
//tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
prach_start = subframe*frame_parms->samples_per_subframe-UE->N_TA_offset;
prach_start = subframe*frame_parms->samples_per_subframe;
#ifdef NR_PRACH_DEBUG
LOG_M("txsig0.m", "txs0", &txdata[0][subframe*frame_parms->samples_per_subframe], frame_parms->samples_per_subframe, 1, 1);