C++ (Cpp) srslte_regs_set_cfi示例

示例#1

文件： ue_dl.c 项目： guyt101z/srsLTE

int srslte_ue_dl_decode_estimate(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t *cfi) {
  float cfi_corr; 
  if (q && cfi && sf_idx < SRSLTE_NSUBFRAMES_X_FRAME) {
    
    /* Get channel estimates for each port */
    srslte_chest_dl_estimate(&q->chest, q->sf_symbols, q->ce, sf_idx);

    /* First decode PCFICH and obtain CFI */
    if (srslte_pcfich_decode(&q->pcfich, q->sf_symbols, q->ce, 
                      srslte_chest_dl_get_noise_estimate(&q->chest), sf_idx, cfi, &cfi_corr)<0) {
      fprintf(stderr, "Error decoding PCFICH\n");
      return SRSLTE_ERROR;
    }

    INFO("Decoded CFI=%d with correlation %.2f, sf_idx=%d\n", *cfi, cfi_corr, sf_idx);

    if (srslte_regs_set_cfi(&q->regs, *cfi)) {
      fprintf(stderr, "Error setting CFI\n");
      return SRSLTE_ERROR;
    }
    
    return SRSLTE_SUCCESS; 
  } else {
    return SRSLTE_ERROR_INVALID_INPUTS; 
  }
}

示例#2

文件： pdcch_file_test.c 项目： CodaCarlson/srsLTE

int base_init() {
  int i;

  if (srslte_filesource_init(&fsrc, input_file_name, SRSLTE_COMPLEX_FLOAT_BIN)) {
    fprintf(stderr, "Error opening file %s\n", input_file_name);
    exit(-1);
  }

  flen = 2 * (SRSLTE_SLOT_LEN(srslte_symbol_sz(cell.nof_prb)));

  input_buffer = malloc(flen * sizeof(cf_t));
  if (!input_buffer) {
    perror("malloc");
    exit(-1);
  }

  fft_buffer = malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
  if (!fft_buffer) {
    perror("malloc");
    return -1;
  }

  for (i=0;i<SRSLTE_MAX_PORTS;i++) {
    ce[i] = malloc(SRSLTE_SF_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
    if (!ce[i]) {
      perror("malloc");
      return -1;
    }
  }

  if (srslte_chest_dl_init(&chest, cell)) {
    fprintf(stderr, "Error initializing equalizer\n");
    return -1;
  }

  if (srslte_ofdm_rx_init(&fft, cell.cp, cell.nof_prb)) {
    fprintf(stderr, "Error initializing FFT\n");
    return -1;
  }

  if (srslte_regs_init(&regs, cell)) {
    fprintf(stderr, "Error initiating regs\n");
    return -1;
  }

  if (srslte_regs_set_cfi(&regs, cfi)) {
    fprintf(stderr, "Error setting CFI %d\n", cfi);
    return -1;
  }
  if (srslte_pdcch_init(&pdcch, &regs, cell)) {
    fprintf(stderr, "Error creating PDCCH object\n");
    exit(-1);
  }
  
  DEBUG("Memory init OK\n",0);
  return 0;
}