C++ (Cpp) srslte_sss_put_slotの例

コード例 #1

ファイル: enb_dl.c プロジェクト: srsLTE/srsLTE

static void put_sync(srslte_enb_dl_t* q)
{
  uint32_t sf_idx = q->dl_sf.tti % 10;

  if (sf_idx == 0 || sf_idx == 5) {
    for (int p = 0; p < q->cell.nof_ports; p++) {
      srslte_pss_put_slot(q->pss_signal, q->sf_symbols[p], q->cell.nof_prb, q->cell.cp);
      srslte_sss_put_slot(sf_idx ? q->sss_signal5 : q->sss_signal0, q->sf_symbols[p],
                          q->cell.nof_prb, q->cell.cp);
    }
  }  
}

コード例 #2

ファイル: simple_tx.c プロジェクト: sdnnfv/srsLTE

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);
}