void profiler_replace_free(void*ptr, size_t size) { sync_free(ptr); RETURN_IF_PROFILER_OFF(); do { volatile int oldval,newval; oldval = prof.total_allocated; newval = oldval-size; if(sync_do_compare_and_swap(&(prof.total_allocated), oldval, newval)) { break; } } while(1); }
int sync_init(sync_t *q, uint32_t frame_size, uint32_t fft_size) { int ret = LIBLTE_ERROR_INVALID_INPUTS; if (q != NULL && frame_size <= 307200 && fft_size_isvalid(fft_size)) { ret = LIBLTE_ERROR; bzero(q, sizeof(sync_t)); q->detect_cp = true; q->cp = CPNORM; q->mean_peak_value = 0.0; q->sss_en = true; q->correct_cfo = true; q->mean_cfo = 0; q->N_id_2 = 1000; q->N_id_1 = 1000; q->fft_size = fft_size; q->frame_size = frame_size; q->sss_alg = SSS_PARTIAL_3; if (pss_synch_init_fft(&q->pss, frame_size, fft_size)) { fprintf(stderr, "Error initializing PSS object\n"); goto clean_exit; } if (sss_synch_init(&q->sss, fft_size)) { fprintf(stderr, "Error initializing SSS object\n"); goto clean_exit; } if (cfo_init(&q->cfocorr, frame_size)) { fprintf(stderr, "Error initiating CFO\n"); goto clean_exit; } DEBUG("SYNC init with frame_size=%d and fft_size=%d\n", frame_size, fft_size); ret = LIBLTE_SUCCESS; } else { fprintf(stderr, "Invalid parameters frame_size: %d, fft_size: %d\n", frame_size, fft_size); } clean_exit: if (ret == LIBLTE_ERROR) { sync_free(q); } return ret; }
int main(int argc, char **argv) { int N_id_2, ns, find_ns; cf_t *buffer, *fft_buffer; cf_t pss_signal[PSS_LEN]; float sss_signal0[SSS_LEN]; // for subframe 0 float sss_signal5[SSS_LEN]; // for subframe 5 int cid, max_cid; uint32_t find_idx; sync_t sync; lte_fft_t ifft; parse_args(argc, argv); buffer = malloc(sizeof(cf_t) * FLEN); if (!buffer) { perror("malloc"); exit(-1); } fft_buffer = malloc(sizeof(cf_t) * 2 * FLEN); if (!fft_buffer) { perror("malloc"); exit(-1); } if (lte_ifft_init(&ifft, cp, 6)) { fprintf(stderr, "Error creating iFFT object\n"); exit(-1); } if (sync_init(&sync, FLEN, 128, 128)) { fprintf(stderr, "Error initiating PSS/SSS\n"); return -1; } sync_set_threshold(&sync, 1, 1); if (cell_id == -1) { cid = 0; max_cid = 49; } else { cid = cell_id; max_cid = cell_id; } while(cid <= max_cid) { N_id_2 = cid%3; /* Generate PSS/SSS signals */ pss_generate(pss_signal, N_id_2); sss_generate(sss_signal0, sss_signal5, cid); for (ns=0;ns<2;ns++) { memset(buffer, 0, sizeof(cf_t) * FLEN); pss_put_slot(pss_signal, buffer, 6, cp); sss_put_slot(ns?sss_signal5:sss_signal0, buffer, 6, cp); /* Transform to OFDM symbols */ memset(fft_buffer, 0, sizeof(cf_t) * 2 * FLEN); lte_ifft_run_slot(&ifft, buffer, &fft_buffer[offset]); sync_find(&sync, fft_buffer, &find_idx); find_ns = sync_get_slot_id(&sync); printf("cell_id: %d find: %d, offset: %d, ns=%d find_ns=%d\n", cid, find_idx, offset, ns, find_ns); if (find_idx != offset + 960) { printf("offset != find_offset: %d != %d\n", find_idx, offset + 960); exit(-1); } if (ns*10 != find_ns) { printf("ns != find_ns\n", 10 * ns, find_ns); exit(-1); } if (sync_get_cp(&sync) != cp) { printf("Detected CP should be %s\n", CP_ISNORM(cp)?"Normal":"Extended"); exit(-1); } } cid++; } free(fft_buffer); free(buffer); sync_free(&sync); lte_ifft_free(&ifft); printf("Ok\n"); exit(0); }
int main(int argc, char **argv) { int frame_cnt, valid_frames; int freq; int cell_id; sync_t sfind, strack; float max_peak_to_avg; float sfo; int find_idx, track_idx, last_found; enum sync_state state; int n; filesink_t fs; if (argc < 3) { usage(argv[0]); exit(-1); } parse_args(argc,argv); if (base_init(FLEN)) { fprintf(stderr, "Error initializing memory\n"); exit(-1); } if (sync_init(&sfind, FLEN)) { fprintf(stderr, "Error initiating PSS/SSS\n"); exit(-1); } sync_pss_det_peak_to_avg(&sfind); if (sync_init(&strack, track_len)) { fprintf(stderr, "Error initiating PSS/SSS\n"); exit(-1); } sync_pss_det_peak_to_avg(&strack); nof_bands = lte_band_get_fd_band(band, channels, earfcn_start, earfcn_end, MAX_EARFCN); printf("RSSI scan: %d freqs in band %d, RSSI threshold %.2f dBm\n", nof_bands, band, rssi_threshold); n = rssi_scan(); if (n == -1) { exit(-1); } printf("\nDone. Starting PSS search on %d channels\n", n); usleep(500000); INFO("Setting sampling frequency %.2f MHz\n", (float) SAMP_FREQ/MHZ); cuhd_set_rx_srate(uhd, SAMP_FREQ); cuhd_set_rx_gain(uhd, uhd_gain); print_to_matlab(); filesink_init(&fs, "test.dat", COMPLEX_FLOAT_BIN); freq=0; state = INIT; find_idx = 0; max_peak_to_avg = 0; last_found = 0; frame_cnt = 0; while(freq<nof_bands) { /* scan only bands above rssi_threshold */ if (!IS_SIGNAL(freq)) { INFO("[%3d/%d]: Skipping EARFCN %d %.2f MHz RSSI %.2f dB\n", freq, nof_bands, channels[freq].id, channels[freq].fd,10*log10f(rssi[freq]) + 30); freq++; } else { if (state == TRACK || state == FIND) { cuhd_recv(uhd, &input_buffer[FLEN], FLEN, 1); } switch(state) { case INIT: DEBUG("Stopping receiver...\n",0); cuhd_stop_rx_stream(uhd); /* set freq */ cuhd_set_rx_freq(uhd, (double) channels[freq].fd * MHZ); cuhd_rx_wait_lo_locked(uhd); DEBUG("Set freq to %.3f MHz\n", (double) channels[freq].fd); DEBUG("Starting receiver...\n",0); cuhd_start_rx_stream(uhd); /* init variables */ frame_cnt = 0; max_peak_to_avg = -99; cell_id = -1; /* receive first frame */ cuhd_recv(uhd, input_buffer, FLEN, 1); /* set find_threshold and go to FIND state */ sync_set_threshold(&sfind, find_threshold); sync_force_N_id_2(&sfind, -1); state = FIND; break; case FIND: /* find peak in all frame */ find_idx = sync_run(&sfind, &input_buffer[FLEN]); DEBUG("[%3d/%d]: PAR=%.2f\n", freq, nof_bands, sync_get_peak_to_avg(&sfind)); if (find_idx != -1) { /* if found peak, go to track and set lower threshold */ frame_cnt = -1; last_found = 0; sync_set_threshold(&strack, track_threshold); sync_force_N_id_2(&strack, sync_get_N_id_2(&sfind)); state = TRACK; INFO("[%3d/%d]: EARFCN %d Freq. %.2f MHz PSS found PAR %.2f dB\n", freq, nof_bands, channels[freq].id, channels[freq].fd, 10*log10f(sync_get_peak_to_avg(&sfind))); } else { if (frame_cnt >= nof_frames_find) { state = INIT; printf("[%3d/%d]: EARFCN %d Freq. %.2f MHz No PSS found\r", freq, nof_bands, channels[freq].id, channels[freq].fd, frame_cnt - last_found); if (VERBOSE_ISINFO()) { printf("\n"); } freq++; } } break; case TRACK: INFO("Tracking PSS find_idx %d offset %d\n", find_idx, find_idx + track_len); filesink_write(&fs, &input_buffer[FLEN+find_idx+track_len], track_len); track_idx = sync_run(&strack, &input_buffer[FLEN + find_idx - track_len]); p2a_v[frame_cnt] = sync_get_peak_to_avg(&strack); /* save cell id for the best peak-to-avg */ if (p2a_v[frame_cnt] > max_peak_to_avg) { max_peak_to_avg = p2a_v[frame_cnt]; cell_id = sync_get_cell_id(&strack); } if (track_idx != -1) { cfo_v[frame_cnt] = sync_get_cfo(&strack); last_found = frame_cnt; find_idx += track_idx - track_len; idx_v[frame_cnt] = find_idx; } else { idx_v[frame_cnt] = -1; cfo_v[frame_cnt] = 0.0; } /* if we missed to many PSS it is not a cell, next freq */ if (frame_cnt - last_found > max_track_lost) { INFO("\n[%3d/%d]: EARFCN %d Freq. %.2f MHz %d frames lost\n", freq, nof_bands, channels[freq].id, channels[freq].fd, frame_cnt - last_found); state = INIT; freq++; } else if (frame_cnt >= nof_frames_track) { state = DONE; } break; case DONE: cfo[freq] = mean_valid(idx_v, cfo_v, frame_cnt); p2a[freq] = mean_valid(idx_v, p2a_v, frame_cnt); valid_frames = preprocess_idx(idx_v, idx_valid, t, frame_cnt); sfo = sfo_estimate_period(idx_valid, t, valid_frames, FLEN_PERIOD); printf("\n[%3d/%d]: FOUND EARFCN %d Freq. %.2f MHz. " "PAR %2.2f dB, CFO=%+.2f KHz, SFO=%+2.3f KHz, CELL_ID=%3d\n", freq, nof_bands, channels[freq].id, channels[freq].fd, 10*log10f(p2a[freq]), cfo[freq] * 15, sfo / 1000, cell_id); state = INIT; freq++; break; } if (state == TRACK || (state == FIND && frame_cnt)) { memcpy(input_buffer, &input_buffer[FLEN], FLEN * sizeof(cf_t)); } frame_cnt++; } } print_to_matlab(); sync_free(&sfind); base_free(); printf("\n\nDone\n"); exit(0); }