Exemplo n.º 1
0
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);
}
Exemplo n.º 2
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);
}