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@ -70,6 +70,8 @@ typedef struct {
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char *uhd_args;
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float uhd_freq;
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float uhd_gain;
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int udp_port;
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char *udp_address;
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}prog_args_t;
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void args_default(prog_args_t *args) {
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@ -79,10 +81,12 @@ void args_default(prog_args_t *args) {
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args->uhd_args = "";
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args->uhd_freq = -1.0;
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args->uhd_gain = 60.0;
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args->udp_port = -1;
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args->udp_address = "127.0.0.1";
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}
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void usage(prog_args_t *args, char *prog) {
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printf("Usage: %s [agldnrv] -f rx_frequency (in Hz)\n", prog);
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printf("Usage: %s [agldnruv] -f rx_frequency (in Hz)\n", prog);
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printf("\t-a UHD args [Default %s]\n", args->uhd_args);
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printf("\t-g UHD RX gain [Default %.2f dB]\n", args->uhd_gain);
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printf("\t-r RNTI [Default 0x%x]\n",args->rnti);
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@ -93,13 +97,15 @@ void usage(prog_args_t *args, char *prog) {
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printf("\t plots are disabled. Graphics library not available\n");
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#endif
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printf("\t-n nof_subframes [Default %d]\n", args->nof_subframes);
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printf("\t-u remote UDP port to send data (-1 does nothing with it) [Default %d]\n", args->udp_port);
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printf("\t-U remote UDP address to send data [Default %s]\n", args->udp_address);
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printf("\t-v [set verbose to debug, default none]\n");
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}
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void parse_args(prog_args_t *args, int argc, char **argv) {
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int opt;
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args_default(args);
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while ((opt = getopt(argc, argv, "agldnvrf")) != -1) {
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while ((opt = getopt(argc, argv, "agldnvrfuU")) != -1) {
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switch (opt) {
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case 'a':
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args->uhd_args = argv[optind];
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@ -119,6 +125,12 @@ void parse_args(prog_args_t *args, int argc, char **argv) {
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case 'l':
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args->force_N_id_2 = atoi(argv[optind]);
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break;
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case 'u':
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args->udp_port = atoi(argv[optind]);
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break;
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case 'U':
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args->udp_address = argv[optind];
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break;
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case 'd':
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args->disable_plots = true;
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break;
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@ -138,7 +150,7 @@ void parse_args(prog_args_t *args, int argc, char **argv) {
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/**********************************************************************/
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/* TODO: Do something with the output data */
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uint8_t data[10000], data_unpacked[1000];
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uint8_t data[10000], data_packed[10000];
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bool go_exit = false;
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@ -156,7 +168,7 @@ int cuhd_recv_wrapper(void *h, void *data, uint32_t nsamples) {
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extern float mean_exec_time;
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enum receiver_state { DECODE_MIB, DECODE_SIB} state;
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enum receiver_state { DECODE_MIB, DECODE_PDSCH} state;
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int main(int argc, char **argv) {
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@ -174,8 +186,17 @@ int main(int argc, char **argv) {
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int n;
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uint8_t bch_payload[BCH_PAYLOAD_LEN], bch_payload_unpacked[BCH_PAYLOAD_LEN];
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uint32_t sfn_offset;
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udpsink_t udp_sink;
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parse_args(&prog_args, argc, argv);
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if (prog_args.udp_port > 0) {
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if (udpsink_init(&udp_sink, prog_args.udp_address, prog_args.udp_port)) {
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fprintf(stderr, "Error initiating UDP socket to %s:%d\n", prog_args.udp_address, prog_args.udp_port);
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exit(-1);
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}
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}
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printf("Opening UHD device...\n");
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if (cuhd_open(prog_args.uhd_args, &uhd)) {
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fprintf(stderr, "Error opening uhd\n");
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@ -216,7 +237,7 @@ int main(int argc, char **argv) {
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fprintf(stderr, "Error initiating ue_sync\n");
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exit(-1);
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}
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if (ue_dl_init(&ue_dl, cell, 1234)) { // This is the User RNTI
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if (ue_dl_init(&ue_dl, cell, prog_args.rnti==SIRNTI?1:prog_args.rnti)) { // This is the User RNTI
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fprintf(stderr, "Error initiating UE downlink processing module\n");
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exit(-1);
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}
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@ -240,13 +261,12 @@ int main(int argc, char **argv) {
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}
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#endif
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cuhd_start_rx_stream(uhd);
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// Variables for measurements
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uint32_t nframes=0;
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float rsrp=0.0, rsrq=0.0, snr=0.0;
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bool decode_pdsch;
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/* Main loop */
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while (!go_exit && (sf_cnt < prog_args.nof_subframes || prog_args.nof_subframes == -1)) {
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@ -271,18 +291,39 @@ int main(int argc, char **argv) {
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bcch_bch_unpack(bch_payload, BCH_PAYLOAD_LEN, &cell, &sfn);
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printf("Decoded MIB. SFN: %d, offset: %d\n", sfn, sfn_offset);
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sfn = (sfn + sfn_offset)%1024;
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state = DECODE_SIB;
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state = DECODE_PDSCH;
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}
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}
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break;
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case DECODE_SIB:
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/* We are looking for SI Blocks, search only in appropiate places */
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case DECODE_PDSCH:
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if (prog_args.rnti != SIRNTI) {
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decode_pdsch = true;
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} else {
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/* We are looking for SIB1 Blocks, search only in appropiate places */
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if ((ue_sync_get_sfidx(&ue_sync) == 5 && (sfn%2)==0)) {
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n = ue_dl_decode_sib(&ue_dl, sf_buffer, data, ue_sync_get_sfidx(&ue_sync),
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decode_pdsch = true;
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} else {
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decode_pdsch = false;
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}
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}
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if (decode_pdsch) {
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if (prog_args.rnti != SIRNTI) {
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n = ue_dl_decode(&ue_dl, sf_buffer, data_packed, ue_sync_get_sfidx(&ue_sync));
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} else {
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n = ue_dl_decode_sib(&ue_dl, sf_buffer, data_packed, ue_sync_get_sfidx(&ue_sync),
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((int) ceilf((float)3*(((sfn)/2)%4)/2))%4);
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}
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if (n < 0) {
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fprintf(stderr, "Error decoding UE DL\n");fflush(stdout);
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exit(-1);
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} else if (n > 0) {
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/* Send data if socket active */
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if (prog_args.udp_port > 0) {
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bit_unpack_vector(data_packed, data, n);
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if (udpsink_write(&udp_sink, data, 1+(n-1)/8) < 0) {
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fprintf(stderr, "Error sending data through UDP socket\n");
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}
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}
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}
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nof_trials++;
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@ -363,12 +404,12 @@ void init_plots() {
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plot_real_init(&poutfft);
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plot_real_setTitle(&poutfft, "Output FFT - Magnitude");
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plot_real_setLabels(&poutfft, "Index", "dB");
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plot_real_setYAxisScale(&poutfft, -60, 0);
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plot_real_setYAxisScale(&poutfft, -40, 40);
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plot_real_init(&pce);
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plot_real_setTitle(&pce, "Channel Response - Magnitude");
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plot_real_setLabels(&pce, "Index", "dB");
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plot_real_setYAxisScale(&pce, -60, 0);
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plot_real_setYAxisScale(&pce, -40, 40);
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plot_real_init(&p_sync);
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plot_real_setTitle(&p_sync, "PSS Cross-Corr abs value");
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@ -376,13 +417,13 @@ void init_plots() {
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plot_scatter_init(&pscatequal);
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plot_scatter_setTitle(&pscatequal, "PDSCH - Equalized Symbols");
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plot_scatter_setXAxisScale(&pscatequal, -2, 2);
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plot_scatter_setYAxisScale(&pscatequal, -2, 2);
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plot_scatter_setXAxisScale(&pscatequal, -4, 4);
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plot_scatter_setYAxisScale(&pscatequal, -4, 4);
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plot_scatter_init(&pscatequal_pdcch);
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plot_scatter_setTitle(&pscatequal_pdcch, "PDCCH - Equalized Symbols");
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plot_scatter_setXAxisScale(&pscatequal_pdcch, -2, 2);
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plot_scatter_setYAxisScale(&pscatequal_pdcch, -2, 2);
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plot_scatter_setXAxisScale(&pscatequal_pdcch, -4, 4);
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plot_scatter_setYAxisScale(&pscatequal_pdcch, -4, 4);
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}
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ismagom
10 years ago