int main(int argc, char **argv) { int nf, sf_idx, N_id_2; cf_t pss_signal[PSS_LEN]; float sss_signal0[SSS_LEN]; // for subframe 0 float sss_signal5[SSS_LEN]; // for subframe 5 pbch_mib_t mib; ra_pdsch_t ra_dl; ra_prb_t prb_alloc; refsignal_t refs[NSLOTS_X_FRAME]; int i, n; char *data; cf_t *sf_symbols[MAX_PORTS]; dci_msg_t dci_msg; dci_location_t locations[NSUBFRAMES_X_FRAME][10]; #ifdef DISABLE_UHD if (argc < 3) { usage(argv[0]); exit(-1); } #endif parse_args(argc, argv); N_id_2 = cell.id % 3; sf_n_re = 2 * CPNORM_NSYMB * cell.nof_prb * RE_X_RB; sf_n_samples = 2 * SLOT_LEN(lte_symbol_sz(cell.nof_prb)); /* this *must* be called after setting slot_len_* */ base_init(); /* Generate PSS/SSS signals */ pss_generate(pss_signal, N_id_2); sss_generate(sss_signal0, sss_signal5, cell.id); /* Generate CRS signals */ for (i = 0; i < NSLOTS_X_FRAME; i++) { if (refsignal_init_LTEDL(&refs[i], 0, i, cell)) { fprintf(stderr, "Error initiating CRS slot=%d\n", i); return -1; } } mib.nof_ports = cell.nof_ports; mib.nof_prb = cell.nof_prb; mib.phich_length = PHICH_NORM; mib.phich_resources = R_1; mib.sfn = 0; for (i = 0; i < MAX_PORTS; i++) { // now there's only 1 port sf_symbols[i] = sf_buffer; } #ifndef DISABLE_UHD if (!output_file_name) { printf("Set TX rate: %.2f MHz\n", cuhd_set_tx_srate(uhd, lte_sampling_freq_hz(cell.nof_prb)) / 1000000); printf("Set TX gain: %.1f dB\n", cuhd_set_tx_gain(uhd, uhd_gain)); printf("Set TX freq: %.2f MHz\n", cuhd_set_tx_freq(uhd, uhd_freq) / 1000000); } #endif bzero(&ra_dl, sizeof(ra_pdsch_t)); ra_dl.harq_process = 0; ra_dl.mcs_idx = mcs_idx; ra_dl.ndi = 0; ra_dl.rv_idx = 0; ra_dl.alloc_type = alloc_type0; ra_dl.type0_alloc.rbg_bitmask = 0xffffffff; dci_msg_pack_pdsch(&ra_dl, &dci_msg, Format1, cell.nof_prb, false); ra_prb_get_dl(&prb_alloc, &ra_dl, cell.nof_prb); ra_prb_get_re_dl(&prb_alloc, cell.nof_prb, 1, cell.nof_prb<10?(cfi+1):cfi, CPNORM); ra_mcs_from_idx_dl(mcs_idx, cell.nof_prb, &ra_dl.mcs); ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb); /* Initiate valid DCI locations */ for (i=0;i<NSUBFRAMES_X_FRAME;i++) { pdcch_ue_locations(&pdcch, locations[i], 10, i, cfi, 1234); } data = malloc(sizeof(char) * ra_dl.mcs.tbs); if (!data) { perror("malloc"); exit(-1); } nf = 0; if (pdsch_harq_setup(&harq_process, ra_dl.mcs, &prb_alloc)) { fprintf(stderr, "Error configuring HARQ process\n"); exit(-1); } while (nf < nof_frames || nof_frames == -1) { for (sf_idx = 0; sf_idx < NSUBFRAMES_X_FRAME && (nf < nof_frames || nof_frames == -1); sf_idx++) { bzero(sf_buffer, sizeof(cf_t) * sf_n_re); if (sf_idx == 0 || sf_idx == 5) { pss_put_slot(pss_signal, sf_buffer, cell.nof_prb, CPNORM); sss_put_slot(sf_idx ? sss_signal5 : sss_signal0, sf_buffer, cell.nof_prb, CPNORM); } if (sf_idx == 0) { pbch_encode(&pbch, &mib, sf_symbols); } for (n=0;n<2;n++) { refsignal_put(&refs[2*sf_idx+n], &sf_buffer[n*sf_n_re/2]); } pcfich_encode(&pcfich, cfi, sf_symbols, sf_idx); INFO("SF: %d, Generating %d random bits\n", sf_idx, ra_dl.mcs.tbs); for (i=0;i<ra_dl.mcs.tbs;i++) { data[i] = rand()%2; } INFO("Puttting DCI to location: n=%d, L=%d\n", locations[sf_idx][0].ncce, locations[sf_idx][0].L); if (pdcch_encode(&pdcch, &dci_msg, locations[sf_idx][0], 1234, sf_symbols, sf_idx, cfi)) { fprintf(stderr, "Error encoding DCI message\n"); exit(-1); } if (pdsch_encode(&pdsch, data, sf_symbols, sf_idx, &harq_process, ra_dl.rv_idx)) { fprintf(stderr, "Error encoding PDSCH\n"); exit(-1); } /* Transform to OFDM symbols */ lte_ifft_run_sf(&ifft, sf_buffer, output_buffer); /* send to file or usrp */ if (output_file_name) { filesink_write(&fsink, output_buffer, sf_n_samples); usleep(5000); } else { #ifndef DISABLE_UHD vec_sc_prod_cfc(output_buffer, uhd_amp, output_buffer, sf_n_samples); cuhd_send(uhd, output_buffer, sf_n_samples, true); #endif } nf++; } mib.sfn = (mib.sfn + 1) % 1024; printf("SFN: %4d\r", mib.sfn); fflush(stdout); } base_free(); printf("Done\n"); exit(0); }
int main(int argc, char **argv) { pcfich_t pcfich; regs_t regs; int i, j; cf_t *ce[MAX_PORTS]; int nof_re; cf_t *slot_symbols[MAX_PORTS]; uint32_t cfi, cfi_rx, nsf; int cid, max_cid; float corr_res; parse_args(argc,argv); nof_re = CPNORM_NSYMB * cell.nof_prb * RE_X_RB; /* init memory */ for (i=0;i<MAX_PORTS;i++) { ce[i] = malloc(sizeof(cf_t) * nof_re); if (!ce[i]) { perror("malloc"); exit(-1); } for (j=0;j<nof_re;j++) { ce[i][j] = 1; } slot_symbols[i] = malloc(sizeof(cf_t) * nof_re); if (!slot_symbols[i]) { perror("malloc"); exit(-1); } } if (cell.id == 1000) { cid = 0; max_cid = 503; } else { cid = cell.id; max_cid = cell.id; } while(cid <= max_cid) { cell.id = cid; printf("Testing CellID=%d...\n", cid); if (regs_init(®s, cell)) { fprintf(stderr, "Error initiating regs\n"); exit(-1); } if (pcfich_init(&pcfich, ®s, cell)) { fprintf(stderr, "Error creating PBCH object\n"); exit(-1); } for (nsf=0;nsf<10;nsf++) { for (cfi=1;cfi<4;cfi++) { pcfich_encode(&pcfich, cfi, slot_symbols, nsf); /* combine outputs */ for (i=1;i<cell.nof_ports;i++) { for (j=0;j<nof_re;j++) { slot_symbols[0][j] += slot_symbols[i][j]; } } if (pcfich_decode(&pcfich, slot_symbols[0], ce, 0, nsf, &cfi_rx, &corr_res)<0) { exit(-1); } INFO("cfi_tx: %d, cfi_rx: %d, ns: %d, distance: %f\n", cfi, cfi_rx, nsf, corr_res); } } pcfich_free(&pcfich); regs_free(®s); cid++; } for (i=0;i<MAX_PORTS;i++) { free(ce[i]); free(slot_symbols[i]); } printf("OK\n"); exit(0); }