int srslte_sss_synch_init(srslte_sss_synch_t *q, uint32_t fft_size) {
if (q != NULL &&
fft_size <= 2048)
{
uint32_t N_id_2;
srslte_sss_tables_t sss_tables;
bzero(q, sizeof(srslte_sss_synch_t));
if (srslte_dft_plan(&q->dftp_input, fft_size, SRSLTE_DFT_FORWARD, SRSLTE_DFT_COMPLEX)) {
srslte_sss_synch_free(q);
return SRSLTE_ERROR;
}
srslte_dft_plan_set_mirror(&q->dftp_input, true);
srslte_dft_plan_set_dc(&q->dftp_input, true);
q->fft_size = fft_size;
generate_N_id_1_table(q->N_id_1_table);
for (N_id_2=0;N_id_2<3;N_id_2++) {
generate_sss_all_tables(&sss_tables, N_id_2);
convert_tables(&q->fc_tables[N_id_2], &sss_tables);
}
q->N_id_2 = 0;
return SRSLTE_SUCCESS;
}
return SRSLTE_ERROR_INVALID_INPUTS;
}
int initialize() {
input_len=0;
param_get_int_name("input_len",&input_len);
sss_pos_in_frame=960-2*137;
param_get_int_name("sss_pos_in_frame",&sss_pos_in_frame);
sss_pos_in_symbol=33;
param_get_int_name("sss_pos_in_symbol",&sss_pos_in_symbol);
correlation_threshold=3000;
param_get_int_name("correlation_threshold",&correlation_threshold);
N_id_2=0;
param_get_int_name("N_id_2",&N_id_2);
dft_plan(SSS_DFT_LEN,COMPLEX_2_COMPLEX,FORWARD,&plan);
plan.options = DFT_MIRROR_POS | DFT_DC_OFFSET;
generate_sss_all_tables(&sss_tables,N_id_2);
convert_tables(&sss_tables);
#ifdef _COMPILE_ALOE
sf_pm_idx = oesr_get_variable_idx(ctx, "ctrl","subframe_rx");
if (sf_pm_idx < 0) {
moderror("Error getting remote parameter subframe_rx\n");
}
moddebug("Remote subframe_rx parameter is a at %d\n",sf_pm_idx);
#endif
first=1;
return 0;
}
/** Initializes the SSS sequences for the given N_id_2 */
int sss_synch_set_N_id_2(sss_synch_t *q, int N_id_2) {
if (N_id_2 < 0 || N_id_2 > 2) {
fprintf(stderr, "Invalid N_id_2 %d\n", N_id_2);
return -1;
}
struct sss_tables sss_tables;
generate_sss_all_tables(&sss_tables,N_id_2);
convert_tables(&q->fc_tables, &sss_tables);
return 0;
}
