/* This thread listens for set_rx_gain commands to the USRP */ static void* thread_gain_fcn(void *h) { cuhd_handler *handler = static_cast < cuhd_handler * >(h); while(1) { pthread_mutex_lock(&handler->mutex); while(handler->cur_rx_gain == handler->new_rx_gain && handler->cur_tx_gain == handler->new_tx_gain) { pthread_cond_wait(&handler->cond, &handler->mutex); } if (handler->new_rx_gain != handler->cur_rx_gain) { handler->cur_rx_gain = handler->new_rx_gain; cuhd_set_rx_gain(h, handler->cur_rx_gain); } if (handler->tx_gain_same_rx) { cuhd_set_tx_gain(h, handler->cur_rx_gain+handler->tx_rx_gain_offset); } else if (handler->new_tx_gain != handler->cur_tx_gain) { handler->cur_tx_gain = handler->new_tx_gain; cuhd_set_tx_gain(h, handler->cur_tx_gain); } pthread_mutex_unlock(&handler->mutex); } }
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) { int nf, ns, 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; refsignal_t refs[NSLOTS_X_FRAME]; int i; cf_t *slot1_symbols[MAX_PORTS_CTRL]; #ifdef DISABLE_UHD if (argc < 3) { usage(argv[0]); exit(-1); } #endif parse_args(argc,argv); N_id_2 = cell_id%3; slot_n_re = CPNORM_NSYMB * nof_prb * RE_X_RB; slot_n_samples = SLOT_LEN_CPNORM(lte_symbol_sz(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_id, CPNORM, nof_prb)) { fprintf(stderr, "Error initiating CRS slot=%d\n", i); return -1; } } mib.nof_ports = 1; mib.nof_prb = 6; mib.phich_length = PHICH_NORM; mib.phich_resources = R_1; mib.sfn = 0; for (i=0;i<MAX_PORTS_CTRL;i++) { // now there's only 1 port slot1_symbols[i] = slot_buffer; } #ifndef DISABLE_UHD if (!output_file_name) { printf("Set TX rate: %.2f MHz\n", cuhd_set_tx_srate(uhd, UHD_SAMP_FREQ)/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 nf = 0; while(nf<nof_frames || nof_frames == -1) { for (ns=0;ns<NSLOTS_X_FRAME;ns++) { bzero(slot_buffer, sizeof(cf_t) * slot_n_re); switch(ns) { case 0: // tx pss/sss case 10: // tx pss/sss pss_put_slot(pss_signal, slot_buffer, nof_prb, CPNORM); sss_put_slot(ns?sss_signal5:sss_signal0, slot_buffer, nof_prb, CPNORM); break; case 1: // tx pbch pbch_encode(&pbch, &mib, slot1_symbols, 1); break; default: // transmit zeros break; } refsignal_put(&refs[ns], slot_buffer); /* Transform to OFDM symbols */ lte_ifft_run(&ifft, slot_buffer, output_buffer); /* send to file or usrp */ if (output_file_name) { filesink_write(&fsink, output_buffer, slot_n_samples); usleep(5000); } else { #ifndef DISABLE_UHD vec_sc_prod_cfc(output_buffer, uhd_amp, output_buffer, slot_n_samples); cuhd_send(uhd, output_buffer, slot_n_samples, 1); #endif } } mib.sfn=(mib.sfn+1)%1024; printf("SFN: %4d\r", mib.sfn);fflush(stdout); nf++; } base_free(); printf("Done\n"); exit(0); }
int main(int argc, char **argv) { int sf_idx=0, N_id_2=0; cf_t pss_signal[SRSLTE_PSS_LEN]; float sss_signal0[SRSLTE_SSS_LEN]; // for subframe 0 float sss_signal5[SRSLTE_SSS_LEN]; // for subframe 5 int i; #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 * SRSLTE_CP_NORM_NSYMB * cell.nof_prb * SRSLTE_NRE; sf_n_samples = 2 * SRSLTE_SLOT_LEN(srslte_symbol_sz(cell.nof_prb)); cell.phich_length = SRSLTE_PHICH_NORM; cell.phich_resources = SRSLTE_PHICH_R_1; /* this *must* be called after setting slot_len_* */ base_init(); /* Generate PSS/SSS signals */ srslte_pss_generate(pss_signal, N_id_2); srslte_sss_generate(sss_signal0, sss_signal5, cell.id); printf("Set TX rate: %.2f MHz\n", cuhd_set_tx_srate(uhd, srslte_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); uint32_t nbits; srslte_modem_table_t modulator; srslte_modem_table_init(&modulator); srslte_modem_table_lte(&modulator, modulation); srslte_tcod_t turbocoder; srslte_tcod_init(&turbocoder, SRSLTE_TCOD_MAX_LEN_CB); srslte_dft_precoding_t dft_precod; srslte_dft_precoding_init(&dft_precod, 12); nbits = srslte_cbsegm_cbindex(sf_n_samples/8/srslte_mod_bits_x_symbol(modulation)/3 - 12); uint32_t ncoded_bits = sf_n_samples/8/srslte_mod_bits_x_symbol(modulation); uint8_t *data = malloc(sizeof(uint8_t)*nbits); uint8_t *data_enc = malloc(sizeof(uint8_t)*ncoded_bits); cf_t *symbols = malloc(sizeof(cf_t)*sf_n_samples); bzero(data_enc, sizeof(uint8_t)*ncoded_bits); while (1) { for (sf_idx = 0; sf_idx < SRSLTE_NSUBFRAMES_X_FRAME; sf_idx++) { bzero(sf_buffer, sizeof(cf_t) * sf_n_re); #ifdef kk if (sf_idx == 0 || sf_idx == 5) { srslte_pss_put_slot(pss_signal, sf_buffer, cell.nof_prb, SRSLTE_CP_NORM); srslte_sss_put_slot(sf_idx ? sss_signal5 : sss_signal0, sf_buffer, cell.nof_prb, SRSLTE_CP_NORM); /* Transform to OFDM symbols */ srslte_ofdm_tx_sf(&ifft, sf_buffer, output_buffer); float norm_factor = (float) sqrtf(cell.nof_prb)/15; srslte_vec_sc_prod_cfc(output_buffer, uhd_amp*norm_factor, output_buffer, SRSLTE_SF_LEN_PRB(cell.nof_prb)); } else { #endif /* Generate random data */ for (i=0;i<nbits;i++) { data[i] = rand()%2; } srslte_tcod_encode(&turbocoder, data, data_enc, nbits); srslte_mod_modulate(&modulator, data_enc, symbols, ncoded_bits); srslte_interp_linear_offset_cabs(symbols, output_buffer, 8, sf_n_samples/8, 0, 0); // } /* send to usrp */ srslte_vec_sc_prod_cfc(output_buffer, uhd_amp, output_buffer, sf_n_samples); cuhd_send(uhd, output_buffer, sf_n_samples, true); } } base_free(); printf("Done\n"); exit(0); }
int main(int argc, char **argv) { parse_args(argc, argv); srslte_prach_t *p = (srslte_prach_t*)malloc(sizeof(srslte_prach_t)); bool high_speed_flag = false; cf_t preamble[MAX_LEN]; memset(preamble, 0, sizeof(cf_t)*MAX_LEN); srslte_prach_init(p, srslte_symbol_sz(nof_prb), preamble_format, root_seq_idx, high_speed_flag, zero_corr_zone); uint32_t flen = srslte_sampling_freq_hz(nof_prb)/1000; printf("Generating PRACH\n"); bzero(preamble, flen*sizeof(cf_t)); srslte_prach_gen(p, seq_idx, frequency_offset, preamble); uint32_t prach_len = p->N_seq; srslte_vec_save_file("generated",preamble,prach_len*sizeof(cf_t)); cf_t *buffer = malloc(sizeof(cf_t)*flen*nof_frames); // Send through UHD void *uhd; printf("Opening UHD device...\n"); if (cuhd_open(uhd_args, &uhd)) { fprintf(stderr, "Error opening uhd\n"); exit(-1); } printf("Subframe len: %d samples\n", flen); printf("Set TX/RX rate: %.2f MHz\n", cuhd_set_rx_srate(uhd, srslte_sampling_freq_hz(nof_prb)) / 1000000); printf("Set RX gain: %.1f dB\n", cuhd_set_rx_gain(uhd, uhd_gain)); printf("Set TX gain: %.1f dB\n", cuhd_set_tx_gain(uhd, uhd_gain)); printf("Set TX/RX freq: %.2f MHz\n", cuhd_set_rx_freq(uhd, uhd_freq) / 1000000); cuhd_set_tx_srate(uhd, srslte_sampling_freq_hz(nof_prb)); cuhd_set_tx_freq_offset(uhd, uhd_freq, 8e6); sleep(1); cf_t *zeros = calloc(sizeof(cf_t),flen); FILE *f = NULL; if (output_filename) { f = fopen(output_filename, "w"); } srslte_timestamp_t tstamp; cuhd_start_rx_stream(uhd); uint32_t nframe=0; while(nframe<nof_frames) { printf("Rx subframe %d\n", nframe); cuhd_recv_with_time(uhd, &buffer[flen*nframe], flen, true, &tstamp.full_secs, &tstamp.frac_secs); nframe++; if (nframe==9 || nframe==8) { srslte_timestamp_add(&tstamp, 0, 2e-3); if (nframe==8) { cuhd_send_timed2(uhd, zeros, flen, tstamp.full_secs, tstamp.frac_secs, true, false); printf("Transmitting zeros\n"); } else { cuhd_send_timed2(uhd, preamble, flen, tstamp.full_secs, tstamp.frac_secs, true, true); printf("Transmitting PRACH\n"); } } } if (f) { fwrite(&buffer[10*flen], flen*sizeof(cf_t), 1, f); } if (f) { fclose(f); } srslte_prach_free(p); free(p); printf("Done\n"); exit(0); }