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srsLTE
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sync: added new cfocorr object to avoid rebuilding table based on tolerance

This commit is contained in:
Ismael Gomez 2016-10-05 21:45:12 +02:00
parent cbade7d29c
commit 91645c8d65
2 changed files with 11 additions and 1 deletions
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1
srslte/include/srslte/sync/sync.h
View File

@ -84,6 +84,7 @@ typedef struct SRSLTE_API {
uint32_t nof_symbols;
uint32_t cp_len;
srslte_cfo_t cfocorr;
srslte_cfo_t cfocorr2;
sss_alg_t sss_alg;
bool detect_cp;
bool sss_en;

11
srslte/lib/sync/sync.c
View File

@ -78,10 +78,18 @@ int srslte_sync_init(srslte_sync_t *q, uint32_t frame_size, uint32_t max_offset,
fprintf(stderr, "Error initiating CFO\n");
goto clean_exit;
}
if (srslte_cfo_init(&q->cfocorr2, q->frame_size)) {
fprintf(stderr, "Error initiating CFO\n");
goto clean_exit;
}
// Set a CFO tolerance of approx 50 Hz
srslte_cfo_set_tol(&q->cfocorr, 50.0/(15000.0*q->fft_size));
// Set a CFO tolerance of approx 50 Hz
srslte_cfo_set_tol(&q->cfocorr2, 50.0/(15000.0*q->fft_size));
for (int i=0;i<2;i++) {
q->cfo_i_corr[i] = srslte_vec_malloc(sizeof(cf_t)*q->frame_size);
if (!q->cfo_i_corr[i]) {
@ -131,6 +139,7 @@ void srslte_sync_free(srslte_sync_t *q) {
srslte_pss_synch_free(&q->pss);
srslte_sss_synch_free(&q->sss);
srslte_cfo_free(&q->cfocorr);
srslte_cfo_free(&q->cfocorr2);
srslte_cp_synch_free(&q->cp_synch);
for (int i=0;i<2;i++) {
if (q->cfo_i_corr[i]) {
@ -433,7 +442,7 @@ srslte_sync_find_ret_t srslte_sync_find(srslte_sync_t *q, cf_t *input, uint32_t
q->mean_cfo = SRSLTE_VEC_EMA(cfo, q->mean_cfo, q->cfo_ema_alpha);
/* Correct CFO with the averaged CFO estimation */
srslte_cfo_correct(&q->cfocorr, input, q->temp, -q->mean_cfo / q->fft_size);
srslte_cfo_correct(&q->cfocorr2, input, q->temp, -q->mean_cfo / q->fft_size);
input_cfo = q->temp;
}