int main(int argc, char **argv) { ra_pdsch_t ra_dl; int i; int nof_frames; int ret; char *data; dci_location_t locations[10]; uint32_t nof_locations; dci_msg_t dci_msg; data = malloc(10000); if (argc < 3) { usage(argv[0]); exit(-1); } parse_args(argc,argv); if (base_init()) { fprintf(stderr, "Error initializing memory\n"); exit(-1); } if (rnti == SIRNTI) { INFO("Initializing common search space for SI-RNTI\n",0); nof_locations = pdcch_common_locations(&pdcch, locations, 10, cfi); } else { // For ue-specific, generate locations for subframe 5 INFO("Initializing user-specific search space for RNTI: 0x%x\n", rnti); nof_locations = pdcch_ue_locations(&pdcch, locations, 10, 5, cfi, rnti); } ret = -1; nof_frames = 0; do { filesource_read(&fsrc, input_buffer, flen); if (nof_frames == 5) { INFO("Reading %d samples sub-frame %d\n", flen, nof_frames); lte_fft_run_sf(&fft, input_buffer, fft_buffer); if (fmatlab) { fprintf(fmatlab, "infft%d=", nof_frames); vec_fprint_c(fmatlab, input_buffer, flen); fprintf(fmatlab, ";\n"); fprintf(fmatlab, "outfft%d=", nof_frames); vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB); vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB); fprintf(fmatlab, ";\n"); vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB); } /* Get channel estimates for each port */ for (i=0;i<cell.nof_ports;i++) { chest_ce_slot_port(&chest, fft_buffer, ce[i], 2*nof_frames, i); chest_ce_slot_port(&chest, &fft_buffer[CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB], &ce[i][CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB], 2*nof_frames+1, i); if (fmatlab) { chest_fprint(&chest, fmatlab, 2*nof_frames+1, i); } } uint16_t crc_rem = 0; for (i=0;i<nof_locations && crc_rem != rnti;i++) { if (pdcch_extract_llr(&pdcch, fft_buffer, ce, locations[i], nof_frames, cfi)) { fprintf(stderr, "Error extracting LLRs\n"); return -1; } if (pdcch_decode_msg(&pdcch, &dci_msg, Format1A, &crc_rem)) { fprintf(stderr, "Error decoding DCI msg\n"); return -1; } } if (crc_rem == rnti) { if (dci_msg_to_ra_dl(&dci_msg, rnti, 1234, cell, cfi, &ra_dl)) { fprintf(stderr, "Error unpacking PDSCH scheduling DCI message\n"); goto goout; } if (pdsch_harq_setup(&harq_process, ra_dl.mcs, &ra_dl.prb_alloc)) { fprintf(stderr, "Error configuring HARQ process\n"); goto goout; } if (pdsch_decode(&pdsch, fft_buffer, ce, data, nof_frames%10, &harq_process, ra_dl.rv_idx)) { fprintf(stderr, "Error decoding PDSCH\n"); goto goout; } else { printf("PDSCH Decoded OK!\n"); } } } nof_frames++; } while (nof_frames <= max_frames); ret = 0; goout: base_free(); exit(ret); }
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) { ra_pdsch_t ra_dl; int i; int frame_cnt; int ret; dci_location_t locations[MAX_CANDIDATES]; uint32_t nof_locations; dci_msg_t dci_msg; if (argc < 3) { usage(argv[0]); exit(-1); } parse_args(argc,argv); if (base_init()) { fprintf(stderr, "Error initializing memory\n"); exit(-1); } ret = -1; frame_cnt = 0; do { filesource_read(&fsrc, input_buffer, flen); INFO("Reading %d samples sub-frame %d\n", flen, frame_cnt); lte_fft_run_sf(&fft, input_buffer, fft_buffer); /* Get channel estimates for each port */ chest_dl_estimate(&chest, fft_buffer, ce, frame_cnt %10); uint16_t crc_rem = 0; if (pdcch_extract_llr(&pdcch, fft_buffer, ce, chest_dl_get_noise_estimate(&chest), frame_cnt %10, cfi)) { fprintf(stderr, "Error extracting LLRs\n"); return -1; } if (rnti == SIRNTI) { INFO("Initializing common search space for SI-RNTI\n",0); nof_locations = pdcch_common_locations(&pdcch, locations, MAX_CANDIDATES, cfi); } else { INFO("Initializing user-specific search space for RNTI: 0x%x\n", rnti); nof_locations = pdcch_ue_locations(&pdcch, locations, MAX_CANDIDATES, frame_cnt %10, cfi, rnti); } for (i=0;i<nof_locations && crc_rem != rnti;i++) { if (pdcch_decode_msg(&pdcch, &dci_msg, &locations[i], dci_format, &crc_rem)) { fprintf(stderr, "Error decoding DCI msg\n"); return -1; } } if (crc_rem == rnti) { dci_msg_type_t type; if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti, 1234)) { fprintf(stderr, "Can't get DCI message type\n"); exit(-1); } printf("MSG %d: ",i); dci_msg_type_fprint(stdout, type); switch(type.type) { case PDSCH_SCHED: bzero(&ra_dl, sizeof(ra_pdsch_t)); if (dci_msg_unpack_pdsch(&dci_msg, &ra_dl, cell.nof_prb, rnti != SIRNTI)) { fprintf(stderr, "Can't unpack PDSCH message\n"); } else { ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb); if (ra_dl.alloc_type == alloc_type2 && ra_dl.type2_alloc.mode == t2_loc && ra_dl.type2_alloc.riv == 11 && ra_dl.rv_idx == 0 && ra_dl.harq_process == 0 && ra_dl.mcs_idx == 2) { printf("This is the file signal.1.92M.amar.dat\n"); ret = 0; } } break; default: fprintf(stderr, "Unsupported message type\n"); break; } } frame_cnt++; } while (frame_cnt <= max_frames); base_free(); exit(ret); }