/* the gateway function */ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]) { srslte_cell_t cell; srslte_pss_synch_t pss; cf_t *input_symbols; int frame_len; if (nrhs < NOF_INPUTS) { help(); return; } srslte_use_standard_symbol_size(true); if (mexutils_read_cell(ENBCFG, &cell)) { help(); return; } /* Allocate input buffers */ frame_len = mexutils_read_cf(INPUT, &input_symbols); if (frame_len < 0) { mexErrMsgTxt("Error reading input symbols\n"); return; } if (nrhs == NOF_INPUTS+1) { frame_len = (int) mxGetScalar(prhs[NOF_INPUTS]); } if (srslte_pss_synch_init_fft(&pss, frame_len, srslte_symbol_sz(cell.nof_prb))) { fprintf(stderr, "Error initiating PSS\n"); exit(-1); } if (srslte_pss_synch_set_N_id_2(&pss, cell.id%3)) { fprintf(stderr, "Error setting N_id_2=%d\n",cell.id%3); exit(-1); } srslte_pss_synch_set_ema_alpha(&pss, 1.0); int peak_idx = srslte_pss_synch_find_pss(&pss, input_symbols, NULL); if (nlhs >= 1) { plhs[0] = mxCreateDoubleScalar(peak_idx); } if (nlhs >= 2) { mexutils_write_cf(pss.conv_output, &plhs[1], frame_len, 1); } srslte_pss_synch_free(&pss); free(input_symbols); return; }
void srslte_sync_set_em_alpha(srslte_sync_t *q, float alpha) { srslte_pss_synch_set_ema_alpha(&q->pss, alpha); }