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srsLTE
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Removed unused sample offset correction

This commit is contained in:
Ismael Gomez 2018-03-13 18:52:21 +01:00
parent 6ca6919694
commit c2098ad626
8 changed files with 4 additions and 56 deletions
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3
lib/include/srslte/interfaces/ue_interfaces.h
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@ -487,8 +487,7 @@ typedef struct {
uint32_t cfo_ref_mask;
bool average_subframe_enabled;
int time_correct_period;
bool sfo_correct_disable;
std::string sss_algorithm;
std::string sss_algorithm;
float estimator_fil_w;
bool rssi_sensor_enabled;
bool sic_pss_enabled;

7
lib/include/srslte/phy/ue/ue_dl.h
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@ -84,8 +84,6 @@ typedef struct SRSLTE_API {
srslte_ofdm_t fft_mbsfn;
srslte_chest_dl_t chest;
srslte_cfo_t sfo_correct;
srslte_pdsch_cfg_t pdsch_cfg;
srslte_pdsch_cfg_t pmch_cfg;
srslte_softbuffer_rx_t *softbuffers[SRSLTE_MAX_CODEWORDS];
@ -126,8 +124,6 @@ typedef struct SRSLTE_API {
srslte_dci_msg_t pending_ul_dci_msg;
uint16_t pending_ul_dci_rnti;
float sample_offset;
float last_phich_corr;
}srslte_ue_dl_t;
@ -195,9 +191,6 @@ SRSLTE_API int srslte_ue_dl_find_dl_dci_type(srslte_ue_dl_t *q,
SRSLTE_API uint32_t srslte_ue_dl_get_ncce(srslte_ue_dl_t *q);
SRSLTE_API void srslte_ue_dl_set_sample_offset(srslte_ue_dl_t * q,
float sample_offset);
SRSLTE_API int srslte_ue_dl_decode(srslte_ue_dl_t *q,
uint8_t *data[SRSLTE_MAX_CODEWORDS],
uint32_t tm,

30
lib/src/phy/ue/ue_dl.c
View File

@ -71,7 +71,6 @@ int srslte_ue_dl_init(srslte_ue_dl_t *q,
q->pmch_pkt_errors = 0;
q->pmch_pkts_total = 0;
q->pending_ul_dci_rnti = 0;
q->sample_offset = 0;
q->nof_rx_antennas = nof_rx_antennas;
for (int j = 0; j < SRSLTE_MAX_PORTS; j++) {
@ -147,12 +146,7 @@ int srslte_ue_dl_init(srslte_ue_dl_t *q,
goto clean_exit;
}
}
if (srslte_cfo_init(&q->sfo_correct, max_prb*SRSLTE_NRE)) {
fprintf(stderr, "Error initiating SFO correct\n");
goto clean_exit;
}
srslte_cfo_set_tol(&q->sfo_correct, 1e-5f/q->fft[0].symbol_sz);
ret = SRSLTE_SUCCESS;
} else {
fprintf(stderr, "Invalid parametres\n");
@ -178,7 +172,6 @@ void srslte_ue_dl_free(srslte_ue_dl_t *q) {
srslte_pdcch_free(&q->pdcch);
srslte_pdsch_free(&q->pdsch);
srslte_pmch_free(&q->pmch);
srslte_cfo_free(&q->sfo_correct);
for (int i = 0; i < SRSLTE_MAX_TB; i++) {
srslte_softbuffer_rx_free(q->softbuffers[i]);
if (q->softbuffers[i]) {
@ -209,7 +202,6 @@ int srslte_ue_dl_set_cell(srslte_ue_dl_t *q, srslte_cell_t cell)
q->pkt_errors = 0;
q->pkts_total = 0;
q->pending_ul_dci_rnti = 0;
q->sample_offset = 0;
if (q->cell.id != cell.id || q->cell.nof_prb == 0) {
if (q->cell.nof_prb != 0) {
@ -220,11 +212,6 @@ int srslte_ue_dl_set_cell(srslte_ue_dl_t *q, srslte_cell_t cell)
fprintf(stderr, "Error resizing REGs\n");
return SRSLTE_ERROR;
}
if (srslte_cfo_resize(&q->sfo_correct, q->cell.nof_prb*SRSLTE_NRE)) {
fprintf(stderr, "Error resizing SFO correct\n");
return SRSLTE_ERROR;
}
srslte_cfo_set_tol(&q->sfo_correct, 1e-5f/q->fft[0].symbol_sz);
for (int port = 0; port < q->nof_rx_antennas; port++) {
if (srslte_ofdm_rx_set_prb(&q->fft[port], q->cell.cp, q->cell.nof_prb)) {
fprintf(stderr, "Error resizing FFT\n");
@ -348,10 +335,6 @@ void srslte_ue_dl_reset(srslte_ue_dl_t *q) {
bzero(&q->pdsch_cfg, sizeof(srslte_pdsch_cfg_t));
}
void srslte_ue_dl_set_sample_offset(srslte_ue_dl_t * q, float sample_offset) {
q->sample_offset = sample_offset;
}
/** Applies the following operations to a subframe of synchronized samples:
* - OFDM demodulation
* - Channel estimation
@ -395,17 +378,6 @@ int srslte_ue_dl_decode_fft_estimate_noguru(srslte_ue_dl_t *q, cf_t *input[SRSLT
/* Run FFT for all subframe data */
for (int j=0;j<q->nof_rx_antennas;j++) {
srslte_ofdm_rx_sf_ng(&q->fft[j], input[j], q->sf_symbols_m[j]);
/* Correct SFO multiplying by complex exponential in the time domain */
if (q->sample_offset) {
int nsym = SRSLTE_CP_NSYMB(q->cell.cp);
for (int i=0;i<2*nsym;i++) {
srslte_cfo_correct(&q->sfo_correct,
&q->sf_symbols_m[j][i*q->cell.nof_prb*SRSLTE_NRE],
&q->sf_symbols_m[j][i*q->cell.nof_prb*SRSLTE_NRE],
q->sample_offset / q->fft[j].symbol_sz);
}
}
}
return srslte_ue_dl_decode_estimate_mbsfn(q, sf_idx, cfi, SRSLTE_SF_NORM);
} else {

3
srsue/hdr/phy/phch_worker.h
View File

@ -54,8 +54,7 @@ public:
void set_tti(uint32_t tti, uint32_t tx_tti);
void set_tx_time(srslte_timestamp_t tx_time, uint32_t next_offset);
void set_cfo(float cfo);
void set_sample_offset(float sample_offset);
void set_ul_params(bool pregen_disabled = false);
void set_crnti(uint16_t rnti);
void enable_pregen_signals(bool enabled);

4
srsue/src/main.cc
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@ -258,10 +258,6 @@ void parse_args(all_args_t *args, int argc, char *argv[]) {
bpo::value<int>(&args->expert.phy.time_correct_period)->default_value(5),
"Period for sampling time offset correction.")
("expert.sfo_correct_disable",
bpo::value<bool>(&args->expert.phy.sfo_correct_disable)->default_value(false),
"Disables phase correction before channel estimation.")
("expert.sss_algorithm",
bpo::value<string>(&args->expert.phy.sss_algorithm)->default_value("full"),
"Selects the SSS estimation algorithm.")

2
srsue/src/phy/phch_recv.cc
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@ -636,8 +636,6 @@ void phch_recv::run_thread()
worker->set_cfo(ul_dl_factor * metrics.cfo / 15000);
worker_com->set_sync_metrics(metrics);
worker->set_sample_offset(srslte_ue_sync_get_sfo(&ue_sync)/1000);
/* Compute TX time: Any transmission happens in TTI+4 thus advance 4 ms the reception time */
srslte_timestamp_t rx_time, tx_time, tx_time_prach;
srslte_ue_sync_get_last_timestamp(&ue_sync, &rx_time);

8
srsue/src/phy/phch_worker.cc
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@ -190,14 +190,6 @@ void phch_worker::set_cfo(float cfo_)
cfo = cfo_;
}
void phch_worker::set_sample_offset(float sample_offset)
{
if (phy->args->sfo_correct_disable) {
sample_offset = 0;
}
srslte_ue_dl_set_sample_offset(&ue_dl, sample_offset);
}
void phch_worker::set_crnti(uint16_t rnti)
{
srslte_ue_dl_set_rnti(&ue_dl, rnti);

3
srsue/src/phy/phy.cc
View File

@ -97,8 +97,7 @@ void phy::set_default_args(phy_args_t *args)
args->cfo_integer_enabled = false;
args->cfo_correct_tol_hz = 50;
args->time_correct_period = 5;
args->sfo_correct_disable = false;
args->sss_algorithm = "full";
args->sss_algorithm = "full";
args->estimator_fil_w = 0.1;
}