prachsim.c 23.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
/*
 * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The OpenAirInterface Software Alliance licenses this file to You under
 * the OAI Public License, Version 1.1  (the "License"); you may not use this file
 * except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.openairinterface.org/?page_id=698
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *-------------------------------------------------------------------------------
 * For more information about the OpenAirInterface (OAI) Software Alliance:
 *      contact@openairinterface.org
 */

#include <string.h>
#include <math.h>
#include <unistd.h>
25
#include <pthread.h>
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

#include "common/config/config_userapi.h"
#include "common/utils/LOG/log.h"
#include "common/ran_context.h" 

#include "SIMULATION/TOOLS/sim.h"
#include "SIMULATION/RF/rf.h"
#include "PHY/types.h"
#include "PHY/defs_gNB.h"
#include "PHY/defs_nr_UE.h"
#include "SCHED_NR/sched_nr.h"
#include "SCHED_NR_UE/phy_frame_config_nr.h"
#include "PHY/phy_vars_nr_ue.h"
#include "PHY/NR_REFSIG/refsig_defs_ue.h"
#include "PHY/NR_REFSIG/nr_mod_table.h"
#include "PHY/MODULATION/modulation_eNB.h"
#include "PHY/MODULATION/modulation_UE.h"
#include "PHY/INIT/phy_init.h"
cig's avatar
cig committed
44
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
45
#include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
46
#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
47
#include "nr_unitary_defs.h"
48 49
#include "OCG_vars.h"

50 51
#define NR_PRACH_DEBUG 1
#define PRACH_WRITE_OUTPUT_DEBUG 1
52

53 54 55
PHY_VARS_gNB *gNB;
PHY_VARS_NR_UE *UE;
RAN_CONTEXT_t RC;
56
RU_t *ru;
57 58
double cpuf;
extern uint16_t prach_root_sequence_map0_3[838];
59
uint16_t NB_UE_INST=1;
60
openair0_config_t openair0_cfg[MAX_CARDS];
cig's avatar
cig committed
61
uint8_t nfapi_mode=0;
62
int sl_ahead = 0;
63

64
//void dump_nr_prach_config(NR_DL_FRAME_PARMS *frame_parms,uint8_t subframe);
65

66 67 68
/* temporary dummy implem of get_softmodem_optmask, till basic simulators implemented as device */
uint64_t get_softmodem_optmask(void) {return 0;}
softmodem_params_t *get_softmodem_params(void) {return 0;}
69

70
void pdcp_run (const protocol_ctxt_t *const  ctxt_pP) { return;}
71

72 73 74 75 76 77
boolean_t pdcp_data_ind(const protocol_ctxt_t *const ctxt_pP,
                        const srb_flag_t   srb_flagP,
                        const MBMS_flag_t  MBMS_flagP,
                        const rb_id_t      rb_idP,
                        const sdu_size_t   sdu_buffer_sizeP,
                        mem_block_t *const sdu_buffer_pP) {return(false);}
78

79 80 81
void nr_ip_over_LTE_DRB_preconfiguration(void){}
void pdcp_layer_init(void) {}
int8_t nr_mac_rrc_data_ind_ue(const module_id_t module_id, const int CC_id, const uint8_t gNB_index, const int8_t channel, const uint8_t* pduP, const sdu_size_t pdu_len) {return 0;}
82

83
int main(int argc, char **argv){
84 85

  char c;
86 87 88 89 90 91 92 93 94
  double sigma2, sigma2_dB = 0, SNR, snr0 = -2.0, snr1 = 0.0, ue_speed0 = 0.0, ue_speed1 = 0.0;
  double **s_re, **s_im, **r_re, **r_im, iqim = 0.0, delay_avg = 0, ue_speed = 0, fs, bw;
  int i, aa, aarx, **txdata, trial, n_frames = 1, prach_start, rx_prach_start; //, ntrials=1;
  int N_RB_UL = 106, delay = 0, NCS_config = 13, rootSequenceIndex = 1, threequarter_fs = 0, mu = 1, fd_occasion = 0, loglvl = OAILOG_INFO, numRA = 0, prachStartSymbol = 0;
  uint8_t snr1set = 0, ue_speed1set = 0, transmission_mode = 1, n_tx = 1, n_rx = 1, awgn_flag = 0, msg1_frequencystart = 0, num_prach_fd_occasions = 1, prach_format;
  uint8_t frame = 1, subframe = 19, config_index = 98, prach_sequence_length = 1, num_root_sequences = 16, restrictedSetConfig = 0, N_dur, N_t_slot, start_symbol;
  uint16_t Nid_cell = 0, preamble_tx = 0, preamble_delay, format, format0, format1;
  uint32_t tx_lev = 10000, prach_errors = 0, samp_count; //,tx_lev_dB;
  uint64_t SSB_positions = 0x01, absoluteFrequencyPointA = 640000;
95 96 97
  //  int8_t interf1=-19,interf2=-19;
  //  uint8_t abstraction_flag=0,calibration_flag=0;
  //  double prach_sinr;
98 99 100 101
  //  uint32_t nsymb;
  //  uint16_t preamble_max, preamble_energy_max;

  NR_DL_FRAME_PARMS *frame_parms;
102
  NR_PRACH_RESOURCES_t prach_resources;
103 104 105 106
  nfapi_nr_prach_config_t *prach_config;
  nfapi_nr_prach_pdu_t *prach_pdu;
  fapi_nr_prach_config_t *ue_prach_config;
  fapi_nr_ul_config_prach_pdu *ue_prach_pdu;
107

108 109
  channel_desc_t *UE2gNB;
  SCM_t channel_model = Rayleigh1;
110 111
  cpuf = get_cpu_freq_GHz();

112
  if ( load_configmodule(argc,argv,CONFIG_ENABLECMDLINEONLY) == 0) {
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183
    exit_fun("[SOFTMODEM] Error, configuration module init failed\n");
  }

  randominit(0);

  while ((c = getopt (argc, argv, "hHaA:Cr:p:g:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:E")) != -1) {
    switch (c) {
    case 'a':
      printf("Running AWGN simulation\n");
      awgn_flag = 1;
      /* ntrials not used later, no need to set */
      //ntrials=1;
      break;

    case 'd':
      delay = atoi(optarg);
      break;

    case 'g':
      switch((char)*optarg) {
      case 'A':
        channel_model=SCM_A;
        break;

      case 'B':
        channel_model=SCM_B;
        break;

      case 'C':
        channel_model=SCM_C;
        break;

      case 'D':
        channel_model=SCM_D;
        break;

      case 'E':
        channel_model=EPA;
        break;

      case 'F':
        channel_model=EVA;
        break;

      case 'G':
        channel_model=ETU;
        break;

      case 'H':
        channel_model=Rayleigh8;

      case 'I':
        channel_model=Rayleigh1;

      case 'J':
        channel_model=Rayleigh1_corr;

      case 'K':
        channel_model=Rayleigh1_anticorr;

      case 'L':
        channel_model=Rice8;

      case 'M':
        channel_model=Rice1;

      case 'N':
        channel_model=Rayleigh1_800;
        break;

      default:
184
        printf("Unsupported channel model!\n");
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
        exit(-1);
      }

      break;

    case 'E':
      threequarter_fs=1;
      break;

    case 'n':
      n_frames = atoi(optarg);
      break;

    case 's':
      snr0 = atof(optarg);
200
      printf("Setting SNR0 to %f\n",snr0);
201 202 203 204 205
      break;

    case 'S':
      snr1 = atof(optarg);
      snr1set=1;
206
      printf("Setting SNR1 to %f\n",snr1);
207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231
      break;

    case 'p':
      preamble_tx=atoi(optarg);
      break;

    case 'v':
      ue_speed0 = atoi(optarg);
      break;

    case 'V':
      ue_speed1 = atoi(optarg);
      ue_speed1set = 1;
      break;

    case 'Z':
      NCS_config = atoi(optarg);

      if ((NCS_config > 15) || (NCS_config < 0))
        printf("Illegal NCS_config %d, (should be 0-15)\n",NCS_config);

      break;

    case 'H':
      printf("High-Speed Flag enabled\n");
232
      restrictedSetConfig = 1;
233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248
      break;

    case 'L':
      rootSequenceIndex = atoi(optarg);

      if ((rootSequenceIndex < 0) || (rootSequenceIndex > 837))
        printf("Illegal rootSequenceNumber %d, (should be 0-837)\n",rootSequenceIndex);

      break;

    case 'x':
      transmission_mode=atoi(optarg);

      if ((transmission_mode!=1) &&
          (transmission_mode!=2) &&
          (transmission_mode!=6)) {
249
        printf("Unsupported transmission mode %d\n",transmission_mode);
250 251 252 253 254 255 256 257 258
        exit(-1);
      }

      break;

    case 'y':
      n_tx=atoi(optarg);

      if ((n_tx==0) || (n_tx>2)) {
259
        printf("Unsupported number of tx antennas %d\n",n_tx);
260 261 262 263 264 265 266 267 268
        exit(-1);
      }

      break;

    case 'z':
      n_rx=atoi(optarg);

      if ((n_rx==0) || (n_rx>2)) {
269
        printf("Unsupported number of rx antennas %d\n",n_rx);
270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312
        exit(-1);
      }

      break;

    case 'N':
      Nid_cell = atoi(optarg);
      break;

    case 'R':
      N_RB_UL = atoi(optarg);
      break;

    case 'F':
      break;

    default:
    case 'h':
      printf("%s -h(elp) -a(wgn on) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n",
             argv[0]);
      printf("-h This message\n");
      printf("-a Use AWGN channel and not multipath\n");
      printf("-n Number of frames to simulate\n");
      printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB.  If n_frames is 1 then just SNR is simulated\n");
      printf("-S Ending SNR, runs from SNR0 to SNR1\n");
      printf("-g [A,B,C,D,E,F,G,I,N] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) or Rayleigh1 (I) or Rayleigh1_800 (N) models (ignores delay spread and Ricean factor)\n");
      printf("-z Number of RX antennas used in gNB\n");
      printf("-N Nid_cell\n");
      printf("-O oversampling factor (1,2,4,8,16)\n");
      //    printf("-f PRACH format (0=1,1=2,2=3,3=4)\n");
      printf("-d Channel delay \n");
      printf("-v Starting UE velocity in km/h, runs from 'v' to 'v+50km/h'. If n_frames is 1 just 'v' is simulated \n");
      printf("-V Ending UE velocity in km/h, runs from 'v' to 'V'");
      printf("-L rootSequenceIndex (0-837)\n");
      printf("-Z NCS_config (ZeroCorrelationZone) (0-15)\n");
      printf("-H Run with High-Speed Flag enabled \n");
      printf("-R Number of PRB (6,15,25,50,75,100)\n");
      printf("-F Input filename (.txt format) for RX conformance testing\n");
      exit (-1);
      break;
    }
  }

313
  // Configure log
314 315 316 317 318
  logInit();
  set_glog(loglvl);
  T_stdout = 1;
  SET_LOG_DEBUG(PRACH); 

319
  // Configure gNB and RU
320 321 322
  RC.gNB = (PHY_VARS_gNB**) malloc(2*sizeof(PHY_VARS_gNB *));
  RC.gNB[0] = malloc(sizeof(PHY_VARS_gNB));
  memset(RC.gNB[0],0,sizeof(PHY_VARS_gNB));
323 324 325 326 327 328

  RC.ru = (RU_t**) malloc(2*sizeof(RU_t *));
  RC.ru[0] = (RU_t*) malloc(sizeof(RU_t ));
  memset(RC.ru[0],0,sizeof(RU_t));
  RC.nb_RU = 1;

329 330 331 332 333 334
  gNB          = RC.gNB[0];
  ru           = RC.ru[0];
  frame_parms  = &gNB->frame_parms;
  prach_config = &gNB->gNB_config.prach_config;
  prach_pdu    = &gNB->prach_vars.list[0].pdu;
  frame_parms  = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
335 336 337 338 339 340

  s_re = malloc(2*sizeof(double*));
  s_im = malloc(2*sizeof(double*));
  r_re = malloc(2*sizeof(double*));
  r_im = malloc(2*sizeof(double*));

341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447
  frame_parms->nb_antennas_tx   = n_tx;
  frame_parms->nb_antennas_rx   = n_rx;
  frame_parms->N_RB_DL          = N_RB_UL;
  frame_parms->N_RB_UL          = N_RB_UL;
  frame_parms->threequarter_fs  = threequarter_fs;
  frame_parms->frame_type       = TDD;
  frame_parms->freq_range       = nr_FR1;
  frame_parms->numerology_index = mu;

  nr_phy_config_request_sim(gNB, N_RB_UL, N_RB_UL, mu, Nid_cell, SSB_positions);

  //nsymb = (frame_parms->Ncp == 0) ? 14 : 12;

  printf("FFT Size %d, Extended Prefix %d, Samples per subframe %d, Frame type %s, Frequency Range %s\n",
         NUMBER_OF_OFDM_CARRIERS,
         frame_parms->Ncp,
         frame_parms->samples_per_subframe,
         frame_parms->frame_type == FDD ? "FDD" : "TDD",
         frame_parms->freq_range == nr_FR1 ? "FR1" : "FR2");

  ru->nr_frame_parms = frame_parms;
  ru->if_south       = LOCAL_RF;
  ru->nb_tx          = n_tx;
  ru->nb_rx          = n_rx;

  gNB->gNB_config.carrier_config.num_tx_ant.value = 1;
  gNB->gNB_config.carrier_config.num_rx_ant.value = 1;
  gNB->gNB_config.tdd_table.tdd_period.value = 6;

  gNB->gNB_config.prach_config.num_prach_fd_occasions.value = num_prach_fd_occasions;
  gNB->gNB_config.prach_config.num_prach_fd_occasions_list = (nfapi_nr_num_prach_fd_occasions_t *) malloc(num_prach_fd_occasions*sizeof(nfapi_nr_num_prach_fd_occasions_t));

  gNB->proc.slot_rx       = subframe;

  get_nr_prach_info_from_index(config_index,
                               (int)frame,
                               (int)subframe,
                               absoluteFrequencyPointA,
                               mu,
                               frame_parms->frame_type,
                               &format,
                               &start_symbol,
                               &N_t_slot,
                               &N_dur);

  format0 = format&0xff;      // first column of format from table
  format1 = (format>>8)&0xff; // second column of format from table

  if (format1 != 0xff) {
    switch(format0) {
      case 0xa1:
        prach_format = 9;
        break;
      case 0xa2:
        prach_format = 10;
        break;
      case 0xa3:
        prach_format = 11;
        break;
    default:
      AssertFatal(1==0, "Only formats A1/B1 A2/B2 A3/B3 are valid for dual format");
    }
  } else {
    switch(format0) {
      case 0xa1:
        prach_format = 0;
        break;
      case 0xa2:
        prach_format = 1;
        break;
      case 0xa3:
        prach_format = 2;
        break;
      case 0xb1:
        prach_format = 3;
        break;
      case 0xb2:
        prach_format = 4;
        break;
      case 0xb3:
        prach_format = 5;
        break;
      case 0xb4:
        prach_format = 6;
        break;
      case 0xc0:
        prach_format = 7;
        break;
      case 0xc2:
        prach_format = 8;
        break;
      case 0:
        // long formats are handled @ PHY
        break;
      case 1:
        // long formats are handled @ PHY
        break;
      case 2:
        // long formats are handled @ PHY
        break;
      case 3:
        // long formats are handled @ PHY
        break;
    default:
      AssertFatal(1==0, "Invalid PRACH format");
    }
  }
448

449 450 451 452 453 454 455
  prach_config->num_prach_fd_occasions_list[fd_occasion].prach_root_sequence_index.value = rootSequenceIndex;
  prach_config->num_prach_fd_occasions_list[fd_occasion].k1.value                        = msg1_frequencystart;
  prach_config->restricted_set_config.value                                              = restrictedSetConfig;
  prach_config->prach_sequence_length.value                                              = prach_sequence_length;
  prach_config->num_prach_fd_occasions_list[fd_occasion].num_root_sequences.value        = num_root_sequences;
  prach_pdu->num_cs                                                                      = get_NCS(NCS_config, format0, restrictedSetConfig);
  prach_pdu->prach_format                                                                = prach_format;
456 457

  memcpy((void*)&ru->config,(void*)&RC.gNB[0]->gNB_config,sizeof(ru->config));
458 459
  RC.nb_nr_L1_inst=1;
  phy_init_nr_gNB(gNB,0,0);
460
  nr_phy_init_RU(ru);
461 462
  gNB->common_vars.rxdata = ru->common.rxdata;
  set_tdd_config_nr(&gNB->gNB_config, mu, 7, 6, 2, 4);
463

464
  // Configure UE
465 466 467 468 469 470
  UE = malloc(sizeof(PHY_VARS_NR_UE));
  memset((void*)UE,0,sizeof(PHY_VARS_NR_UE));
  PHY_vars_UE_g = malloc(2*sizeof(PHY_VARS_NR_UE**));
  PHY_vars_UE_g[0] = malloc(2*sizeof(PHY_VARS_NR_UE*));
  PHY_vars_UE_g[0][0] = UE;
  memcpy(&UE->frame_parms,frame_parms,sizeof(NR_DL_FRAME_PARMS));
471 472 473
  UE->nrUE_config.prach_config.num_prach_fd_occasions_list = (fapi_nr_num_prach_fd_occasions_t *) malloc(num_prach_fd_occasions*sizeof(fapi_nr_num_prach_fd_occasions_t));

  if (init_nr_ue_signal(UE, 1, 0) != 0){
474 475 476 477
    printf("Error at UE NR initialisation\n");
    exit(-1);
  }

478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503
  ue_prach_pdu           = &UE->prach_vars[0]->prach_pdu;
  ue_prach_config        = &UE->nrUE_config.prach_config;
  UE->prach_resources[0] = &prach_resources;
  txdata                 = UE->common_vars.txdata;

  UE->prach_vars[0]->amp        = AMP;
  ue_prach_pdu->root_seq_id     = rootSequenceIndex;
  ue_prach_pdu->num_cs          = get_NCS(NCS_config, format0, restrictedSetConfig);
  ue_prach_pdu->restricted_set  = restrictedSetConfig;
  ue_prach_pdu->freq_msg1       = msg1_frequencystart;
  ue_prach_pdu->prach_format    = prach_format;

  ue_prach_config->prach_sub_c_spacing                                                = mu;
  ue_prach_config->prach_sequence_length                                              = prach_sequence_length;
  ue_prach_config->restricted_set_config                                              = restrictedSetConfig;
  ue_prach_config->num_prach_fd_occasions_list[fd_occasion].num_root_sequences        = num_root_sequences;
  ue_prach_config->num_prach_fd_occasions_list[fd_occasion].prach_root_sequence_index = rootSequenceIndex;
  ue_prach_config->num_prach_fd_occasions_list[fd_occasion].k1                        = msg1_frequencystart;

  if (preamble_tx == 99)
    preamble_tx = (uint16_t)(taus()&0x3f);

  if (n_frames == 1)
    printf("raPreamble %d\n",preamble_tx);

  UE->prach_resources[0]->ra_PreambleIndex = preamble_tx;
504

505 506 507
  // Configure channel
  bw = N_RB_UL*(180e3)*(1 << frame_parms->numerology_index);
  AssertFatal(bw<=122.88e6,"Illegal channel bandwidth %f (mu %d,N_RB_UL %d)\n", bw, frame_parms->numerology_index, N_RB_UL);
508

509 510 511 512 513 514
  if (bw <= 30.72e6)
    fs = 30.72e6;
  else if (bw <= 61.44e6)
    fs = 61.44e6;
  else if (bw <= 122.88e6)
    fs = 122.88e6;
515 516 517 518 519 520

  LOG_I(PHY,"Running with bandwidth %f Hz, fs %f samp/s, FRAME_LENGTH_COMPLEX_SAMPLES %d\n",bw,fs,FRAME_LENGTH_COMPLEX_SAMPLES);

  UE2gNB = new_channel_desc_scm(UE->frame_parms.nb_antennas_tx,
                                gNB->frame_parms.nb_antennas_rx,
                                channel_model,
521 522
                                fs,
                                bw,
523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544
                                0.0,
                                delay,
                                0);

  if (UE2gNB==NULL) {
    printf("Problem generating channel model. Exiting.\n");
    exit(-1);
  }

  for (i=0; i<2; i++) {

    s_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    bzero(s_re[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    s_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    bzero(s_im[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));

    r_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    bzero(r_re[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    r_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
    bzero(r_im[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
  }

545 546 547 548 549
  // compute PRACH sequence
  compute_nr_prach_seq(prach_config->prach_sequence_length.value,
                       prach_config->num_prach_fd_occasions_list[fd_occasion].num_root_sequences.value,
                       prach_config->num_prach_fd_occasions_list[fd_occasion].prach_root_sequence_index.value,
                       gNB->X_u);
550

551 552 553 554
  compute_nr_prach_seq(ue_prach_config->prach_sequence_length,
                       ue_prach_config->num_prach_fd_occasions_list[fd_occasion].num_root_sequences,
                       ue_prach_config->num_prach_fd_occasions_list[fd_occasion].prach_root_sequence_index,
                       UE->X_u);
555

556
  /*tx_lev = generate_nr_prach(UE,
557
			     0, //gNB_id,
cig's avatar
cig committed
558
			     subframe); */ //commented for testing purpose
559

560
  UE_nr_rxtx_proc_t proc={0};
561 562
  proc.frame_tx  = frame;
  proc.nr_tti_tx = subframe;
563
  nr_ue_prach_procedures(UE,&proc,0,0);
564 565 566 567

  /* tx_lev_dB not used later, no need to set */
  //tx_lev_dB = (unsigned int) dB_fixed(tx_lev);

568 569 570 571 572 573 574 575 576 577 578
  if (mu == 0)
    samp_count = frame_parms->samples_per_subframe;
  else
    samp_count = (subframe%(frame_parms->slots_per_subframe/2)) ? frame_parms->samples_per_slotN0 : frame_parms->samples_per_slot0;

  prach_start = subframe*samp_count - UE->N_TA_offset;

  #ifdef NR_PRACH_DEBUG
    LOG_M("txsig0.m", "txs0", &txdata[0][prach_start], samp_count, 1, 1);
    //LOG_M("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
  #endif
579 580

  // multipath channel
581
  // dump_nr_prach_config(&gNB->frame_parms,subframe);
582

583
  for (i = 0; i < samp_count<<1; i++) {
584 585
    for (aa=0; aa<1; aa++) {
      if (awgn_flag == 0) {
586 587
        s_re[aa][i] = ((double)(((short *)&txdata[aa][prach_start]))[(i<<1)]);
        s_im[aa][i] = ((double)(((short *)&txdata[aa][prach_start]))[(i<<1)+1]);
588 589 590
      } else {
        for (aarx=0; aarx<gNB->frame_parms.nb_antennas_rx; aarx++) {
          if (aa==0) {
591 592
            r_re[aarx][i] = ((double)(((short *)&txdata[aa][prach_start]))[(i<<1)]);
            r_im[aarx][i] = ((double)(((short *)&txdata[aa][prach_start]))[(i<<1)+1]);
593
          } else {
594 595
            r_re[aarx][i] += ((double)(((short *)&txdata[aa][prach_start]))[(i<<1)]);
            r_im[aarx][i] += ((double)(((short *)&txdata[aa][prach_start]))[(i<<1)+1]);
596 597 598 599 600 601
          }
        }
      }
    }
  }

602 603 604 605 606 607 608 609
  if (snr1set == 0) {
    if (n_frames == 1)
      snr1 = snr0 + .1;
    else
      snr1 = snr0 + 5.0;
  }

  printf("SNR0 %f, SNR1 %f\n", snr0, snr1);
610

611 612 613 614 615 616 617 618
  if (ue_speed1set == 0) {
    if (n_frames == 1)
      ue_speed1 = ue_speed0 + 10;
    else
      ue_speed1 = ue_speed0 + 50;
  }

  rx_prach_start = subframe*frame_parms->get_samples_per_slot(subframe,frame_parms);
619

Thomas Schlichter's avatar
Thomas Schlichter committed
620
  for (SNR=snr0; SNR<snr1; SNR+=.1) {
621 622 623 624 625 626 627 628 629
    for (ue_speed=ue_speed0; ue_speed<ue_speed1; ue_speed+=10) {
      delay_avg = 0.0;
      // max Doppler shift
      UE2gNB->max_Doppler = 1.9076e9*(ue_speed/3.6)/3e8;
      printf("n_frames %d SNR %f\n",n_frames,SNR);
      prach_errors=0;

      for (trial=0; trial<n_frames; trial++) {

630 631
        uint16_t preamble_rx, preamble_energy, N_ZC;

632 633 634 635 636 637 638 639 640 641
        sigma2_dB = 10*log10((double)tx_lev) - SNR;

        if (n_frames==1)
          printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f\n",sigma2_dB,SNR,10*log10((double)tx_lev));

        //AWGN
        sigma2 = pow(10,sigma2_dB/10);
        //  printf("Sigma2 %f (sigma2_dB %f)\n",sigma2,sigma2_dB);

        if (awgn_flag == 0) {
642
          multipath_tv_channel(UE2gNB, s_re, s_im, r_re, r_im, frame_parms->samples_per_tti<<1, 0);
643 644 645 646 647 648 649 650
        }

        if (n_frames==1) {
          printf("rx_level data symbol %f, tx_lev %f\n",
                 10*log10(signal_energy_fp(r_re,r_im,1,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0)),
                 10*log10(tx_lev));
        }

651 652 653 654
        for (i = 0; i< frame_parms->get_samples_per_slot(subframe,frame_parms); i++) {
          for (aa = 0; aa < frame_parms->nb_antennas_rx; aa++) {
            ((short*) &gNB->common_vars.rxdata[aa][rx_prach_start])[2*i] = (short) (.167*(r_re[aa][i] +sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
            ((short*) &gNB->common_vars.rxdata[aa][rx_prach_start])[2*i+1] = (short) (.167*(r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
655 656
          }
        }
657 658 659 660 661 662 663 664 665 666

        rx_nr_prach_ru(ru, prach_format, numRA, prachStartSymbol, frame, subframe);

        gNB->prach_vars.rxsigF = ru->prach_rxsigF;

        rx_nr_prach(gNB, prach_pdu, frame, subframe, &preamble_rx, &preamble_energy, &preamble_delay);

        printf(" preamble_energy %d preamble_rx %d preamble_tx %d \n", preamble_energy, preamble_rx, preamble_tx);

        if (preamble_rx != preamble_tx)
667
          prach_errors++;
668
        else
669
          delay_avg += (double)preamble_delay;
670 671

        N_ZC = (prach_sequence_length) ? 139 : 839;
672 673

        if (n_frames==1) {
674 675 676 677 678 679 680 681 682 683
          printf("preamble %d (tx %d) : energy %d, delay %d\n",preamble_rx,preamble_tx,preamble_energy,preamble_delay);
          #ifdef NR_PRACH_DEBUG
            LOG_M("prach0.m","prach0", &txdata[0][prach_start], samp_count, 1, 1);
            LOG_M("prachF0.m","prachF0", &gNB->prach_vars.prachF[0], N_ZC, 1, 1);
            LOG_M("rxsig0.m","rxs0", &gNB->common_vars.rxdata[0][rx_prach_start], frame_parms->samples_per_subframe, 1, 1);
            //LOG_M("ru_rxsig0.m","rxs0", &ru->common.rxdata[0][rx_prach_start], frame_parms->samples_per_subframe, 1, 1);
            LOG_M("rxsigF0.m","rxsF0", gNB->prach_vars.rxsigF[0], N_ZC, 1, 1);
            LOG_M("prach_preamble.m","prachp", &gNB->X_u[0], N_ZC, 1, 1);
            LOG_M("ue_prach_preamble.m","prachp", &UE->X_u[0], N_ZC, 1, 1);
          #endif
684 685
        }
      }
686
      printf("SNR %f dB, UE Speed %f km/h: errors %d/%d (delay %f)\n", SNR, ue_speed, prach_errors, n_frames, delay_avg/(double)(n_frames-prach_errors));
Thomas Schlichter's avatar
Thomas Schlichter committed
687 688
      if (prach_errors)
        break;
689
    } // UE Speed loop
Thomas Schlichter's avatar
Thomas Schlichter committed
690 691 692 693
    if (!prach_errors) {
      printf("PRACH test OK\n");
      break;
    }
694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709
  } //SNR loop

  for (i=0; i<2; i++) {
    free(s_re[i]);
    free(s_im[i]);
    free(r_re[i]);
    free(r_im[i]);
  }

  free(s_re);
  free(s_im);
  free(r_re);
  free(r_im);

  return(0);
}