/* * 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> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/mman.h> #include "common/config/config_userapi.h" #include "common/utils/LOG/log.h" #include "common/ran_context.h" #include "PHY/types.h" #include "PHY/defs_nr_common.h" #include "PHY/defs_nr_UE.h" #include "PHY/defs_gNB.h" #include "PHY/NR_REFSIG/refsig_defs_ue.h" #include "PHY/MODULATION/modulation_eNB.h" #include "PHY/MODULATION/modulation_UE.h" #include "PHY/MODULATION/nr_modulation.h" #include "PHY/INIT/phy_init.h" #include "PHY/NR_TRANSPORT/nr_transport_proto.h" #include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h" #include "PHY/NR_UE_ESTIMATION/nr_estimation.h" #include "PHY/phy_vars.h" #include "SCHED_NR/sched_nr.h" #include "openair1/SIMULATION/TOOLS/sim.h" #include "openair1/SIMULATION/RF/rf.h" #include "openair1/SIMULATION/NR_PHY/nr_unitary_defs.h" #include "openair1/SIMULATION/NR_PHY/nr_dummy_functions.c" #include "openair1/PHY/MODULATION/nr_modulation.h" #include <executables/softmodem-common.h> //#define DEBUG_NR_PBCHSIM PHY_VARS_gNB *gNB; PHY_VARS_NR_UE *UE; RAN_CONTEXT_t RC; int32_t uplink_frequency_offset[MAX_NUM_CCs][4]; double cpuf; //uint8_t nfapi_mode = 0; uint16_t NB_UE_INST = 1; // needed for some functions openair0_config_t openair0_cfg[MAX_CARDS]; uint8_t const nr_rv_round_map[4] = {0, 2, 1, 3}; uint8_t const nr_rv_round_map_ue[4] = {0, 2, 1, 3}; uint64_t get_softmodem_optmask(void) {return 0;} softmodem_params_t *get_softmodem_params(void) {return 0;} void init_downlink_harq_status(NR_DL_UE_HARQ_t *dl_harq) {} void nr_phy_config_request_sim_pbchsim(PHY_VARS_gNB *gNB, int N_RB_DL, int N_RB_UL, int mu, int Nid_cell, uint64_t position_in_burst) { NR_DL_FRAME_PARMS *fp = &gNB->frame_parms; nfapi_nr_config_request_scf_t *gNB_config = &gNB->gNB_config; //overwrite for new NR parameters uint64_t rev_burst=0; for (int i=0; i<64; i++) rev_burst |= (((position_in_burst>>(63-i))&0x01)<<i); gNB_config->cell_config.phy_cell_id.value = Nid_cell; gNB_config->ssb_config.scs_common.value = mu; gNB_config->ssb_table.ssb_subcarrier_offset.value = 0; gNB_config->ssb_table.ssb_offset_point_a.value = (N_RB_DL-20)>>1; gNB_config->ssb_table.ssb_mask_list[1].ssb_mask.value = (rev_burst)&(0xFFFFFFFF); gNB_config->ssb_table.ssb_mask_list[0].ssb_mask.value = (rev_burst>>32)&(0xFFFFFFFF); gNB_config->cell_config.frame_duplex_type.value = TDD; gNB_config->ssb_table.ssb_period.value = 1; //10ms gNB_config->carrier_config.dl_grid_size[mu].value = N_RB_DL; gNB_config->carrier_config.ul_grid_size[mu].value = N_RB_UL; gNB_config->carrier_config.num_tx_ant.value = fp->nb_antennas_tx; gNB_config->carrier_config.num_rx_ant.value = fp->nb_antennas_rx; gNB_config->tdd_table.tdd_period.value = 0; //gNB_config->subframe_config.dl_cyclic_prefix_type.value = (fp->Ncp == NORMAL) ? NFAPI_CP_NORMAL : NFAPI_CP_EXTENDED; gNB->mac_enabled = 1; fp->dl_CarrierFreq = 3600000000;//from_nrarfcn(gNB_config->nfapi_config.rf_bands.rf_band[0],gNB_config->nfapi_config.nrarfcn.value); fp->ul_CarrierFreq = 3600000000;//fp->dl_CarrierFreq - (get_uldl_offset(gNB_config->nfapi_config.rf_bands.rf_band[0])*100000); if (mu>2) fp->nr_band = 257; else fp->nr_band = 78; fp->threequarter_fs= 0; gNB_config->carrier_config.dl_bandwidth.value = config_bandwidth(mu, N_RB_DL, fp->nr_band); nr_init_frame_parms(gNB_config, fp); init_symbol_rotation(fp); gNB->configured = 1; LOG_I(PHY,"gNB configured\n"); } int main(int argc, char **argv) { char c; int i,aa,start_symbol; double sigma2, sigma2_dB=10,SNR,snr0=-2.0,snr1=2.0; double cfo=0; uint8_t snr1set=0; int **txdata; double **s_re,**s_im,**r_re,**r_im; //double iqim = 0.0; double ip =0.0; //unsigned char pbch_pdu[6]; // int sync_pos, sync_pos_slot; // FILE *rx_frame_file; FILE *output_fd = NULL; //uint8_t write_output_file=0; //int result; //int freq_offset; // int subframe_offset; // char fname[40], vname[40]; int trial,n_trials=1,n_errors=0,n_errors_payload=0; uint8_t transmission_mode = 1,n_tx=1,n_rx=1; uint16_t Nid_cell=0; uint64_t SSB_positions=0x01; channel_desc_t *gNB2UE; //uint8_t extended_prefix_flag=0; //int8_t interf1=-21,interf2=-21; FILE *input_fd=NULL,*pbch_file_fd=NULL; //uint32_t nsymb,tx_lev,tx_lev1 = 0,tx_lev2 = 0; //char input_val_str[50],input_val_str2[50]; //uint8_t frame_mod4,num_pdcch_symbols = 0; //double pbch_sinr; //int pbch_tx_ant; SCM_t channel_model=AWGN;//Rayleigh1_anticorr; int N_RB_DL=273,mu=1; //unsigned char frame_type = 0; unsigned char pbch_phase = 0; int frame=0; int frame_length_complex_samples; int frame_length_complex_samples_no_prefix; NR_DL_FRAME_PARMS *frame_parms; int ret, payload_ret=0; int run_initial_sync=0; int loglvl=OAILOG_WARNING; float target_error_rate = 0.01; cpuf = get_cpu_freq_GHz(); if ( load_configmodule(argc,argv,CONFIG_ENABLECMDLINEONLY) == 0) { exit_fun("[NR_PBCHSIM] Error, configuration module init failed\n"); } randominit(0); while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:o:s:S:t:x:y:z:M:N:F:GR:dP:IL:m:")) != -1) { switch (c) { /*case 'f': write_output_file=1; output_fd = fopen(optarg,"w"); if (output_fd==NULL) { printf("Error opening %s\n",optarg); exit(-1); } break;*/ /*case 'd': frame_type = 1; 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; default: printf("Unsupported channel model! Exiting.\n"); exit(-1); } break; /*case 'i': interf1=atoi(optarg); break; case 'j': interf2=atoi(optarg); break;*/ case 'n': n_trials = atoi(optarg); break; case 'o': cfo = atof(optarg); #ifdef DEBUG_NR_PBCHSIM printf("Setting CFO to %f Hz\n",cfo); #endif break; case 's': snr0 = atof(optarg); #ifdef DEBUG_NR_PBCHSIM printf("Setting SNR0 to %f\n",snr0); #endif break; case 'S': snr1 = atof(optarg); snr1set=1; #ifdef DEBUG_NR_PBCHSIM printf("Setting SNR1 to %f\n",snr1); #endif break; /* case 't': Td= atof(optarg); break; */ /*case 'p': extended_prefix_flag=1; break;*/ /* case 'r': ricean_factor = pow(10,-.1*atof(optarg)); if (ricean_factor>1) { printf("Ricean factor must be between 0 and 1\n"); exit(-1); } break; */ case 'x': transmission_mode=atoi(optarg); if ((transmission_mode!=1) && (transmission_mode!=2) && (transmission_mode!=6)) { printf("Unsupported transmission mode %d. Exiting.\n",transmission_mode); exit(-1); } break; case 'y': n_tx=atoi(optarg); if ((n_tx==0) || (n_tx>2)) { printf("Unsupported number of TX antennas %d. Exiting.\n", n_tx); exit(-1); } break; case 'z': n_rx=atoi(optarg); if ((n_rx==0) || (n_rx>2)) { printf("Unsupported number of RX antennas %d. Exiting.\n", n_rx); exit(-1); } break; case 'M': SSB_positions = atoi(optarg); break; case 'N': Nid_cell = atoi(optarg); break; case 'R': N_RB_DL = atoi(optarg); break; case 'F': input_fd = fopen(optarg,"r"); if (input_fd==NULL) { printf("Problem with filename %s. Exiting.\n", optarg); exit(-1); } break; case 'P': pbch_phase = atoi(optarg); if (pbch_phase>3) printf("Illegal PBCH phase (0-3) got %d\n",pbch_phase); break; case 'I': run_initial_sync=1; target_error_rate=0.1; break; case 'L': loglvl = atoi(optarg); break; case 'm': mu = atoi(optarg); break; default: case 'h': printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -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("-p Use extended prefix mode\n"); //printf("-d Use TDD\n"); printf("-n Number of frames to simulate\n"); printf("-m Numerology index\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("-t Delay spread for multipath channel\n"); printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n"); printf("-x Transmission mode (1,2,6 for the moment)\n"); printf("-y Number of TX antennas used in eNB\n"); printf("-z Number of RX antennas used in UE\n"); //printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n"); //printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n"); printf("-o Carrier frequency offset in Hz\n"); printf("-M Multiple SSB positions in burst\n"); printf("-N Nid_cell\n"); printf("-R N_RB_DL\n"); printf("-O oversampling factor (1,2,4,8,16)\n"); printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n"); //printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n"); //printf("-f Output filename (.txt format) for Pe/SNR results\n"); printf("-F Input filename (.txt format) for RX conformance testing\n"); exit (-1); break; } } logInit(); set_glog(loglvl); T_stdout = 1; if (snr1set==0) snr1 = snr0+10; printf("Initializing gNodeB for mu %d, N_RB_DL %d\n",mu,N_RB_DL); RC.gNB = (PHY_VARS_gNB**) malloc(sizeof(PHY_VARS_gNB *)); RC.gNB[0] = malloc(sizeof(PHY_VARS_gNB)); gNB = RC.gNB[0]; frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH) frame_parms->nb_antennas_tx = n_tx; frame_parms->nb_antennas_rx = n_rx; frame_parms->N_RB_DL = N_RB_DL; frame_parms->Nid_cell = Nid_cell; frame_parms->nushift = Nid_cell%4; frame_parms->ssb_type = nr_ssb_type_C; nr_phy_config_request_sim_pbchsim(gNB,N_RB_DL,N_RB_DL,mu,Nid_cell,SSB_positions); phy_init_nr_gNB(gNB,0,1); nr_set_ssb_first_subcarrier(&gNB->gNB_config,frame_parms); uint8_t n_hf = 0; int cyclic_prefix_type = NFAPI_CP_NORMAL; double fs=0, eps; double scs = 30000; double bw = 100e6; switch (mu) { case 1: scs = 30000; frame_parms->Lmax = 8; if (N_RB_DL == 217) { fs = 122.88e6; bw = 80e6; } else if (N_RB_DL == 245) { fs = 122.88e6; bw = 90e6; } else if (N_RB_DL == 273) { fs = 122.88e6; bw = 100e6; } else if (N_RB_DL == 106) { fs = 61.44e6; bw = 40e6; } else AssertFatal(1==0,"Unsupported numerology for mu %d, N_RB %d\n",mu, N_RB_DL); break; case 3: frame_parms->Lmax = 64; scs = 120000; if (N_RB_DL == 66) { fs = 122.88e6; bw = 100e6; } else AssertFatal(1==0,"Unsupported numerology for mu %d, N_RB %d\n",mu, N_RB_DL); break; } // cfo with respect to sub-carrier spacing eps = cfo/scs; // computation of integer and fractional FO to compare with estimation results int IFO; if(eps!=0.0){ printf("Introducing a CFO of %lf relative to SCS of %d kHz\n",eps,(int)(scs/1000)); if (eps>0) IFO=(int)(eps+0.5); else IFO=(int)(eps-0.5); printf("FFO = %lf; IFO = %d\n",eps-IFO,IFO); } gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model, fs, bw, 300e-9, 0, 0, 0, 0); if (gNB2UE==NULL) { printf("Problem generating channel model. Exiting.\n"); exit(-1); } frame_length_complex_samples = frame_parms->samples_per_subframe*NR_NUMBER_OF_SUBFRAMES_PER_FRAME; frame_length_complex_samples_no_prefix = frame_parms->samples_per_subframe_wCP; s_re = malloc(2*sizeof(double*)); s_im = malloc(2*sizeof(double*)); r_re = malloc(2*sizeof(double*)); r_im = malloc(2*sizeof(double*)); txdata = malloc(2*sizeof(int*)); 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)); printf("Allocating %d samples for txdata\n",frame_length_complex_samples); txdata[i] = malloc(frame_length_complex_samples*sizeof(int)); bzero(r_re[i],frame_length_complex_samples*sizeof(int)); } if (pbch_file_fd!=NULL) { load_pbch_desc(pbch_file_fd); } //configure UE UE = malloc(sizeof(PHY_VARS_NR_UE)); memcpy(&UE->frame_parms,frame_parms,sizeof(NR_DL_FRAME_PARMS)); //phy_init_nr_top(UE); //called from init_nr_ue_signal if (run_initial_sync==1) UE->is_synchronized = 0; else UE->is_synchronized = 1; UE->perfect_ce = 0; if(eps!=0.0) UE->UE_fo_compensation = 1; // if a frequency offset is set then perform fo estimation and compensation if (init_nr_ue_signal(UE, 1, 0) != 0) { printf("Error at UE NR initialisation\n"); exit(-1); } nr_gold_pbch(UE); // generate signal if (input_fd==NULL) { for (i=0; i<frame_parms->Lmax; i++) { if((SSB_positions >> i) & 0x01) { gNB->ssb[i].ssb_pdu.ssb_pdu_rel15.bchPayload = 0x55dd33; gNB->ssb[i].ssb_pdu.ssb_pdu_rel15.SsbBlockIndex = i; start_symbol = nr_get_ssb_start_symbol(frame_parms,i); int slot = start_symbol/14; for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) memset(gNB->common_vars.txdataF[aa],0,frame_parms->samples_per_slot_wCP*sizeof(int32_t)); nr_common_signal_procedures (gNB,frame,slot,gNB->ssb[i].ssb_pdu); for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) { if (cyclic_prefix_type == 1) { PHY_ofdm_mod(gNB->common_vars.txdataF[aa], &txdata[aa][frame_parms->get_samples_slot_timestamp(slot,frame_parms,0)], frame_parms->ofdm_symbol_size, 12, frame_parms->nb_prefix_samples, CYCLIC_PREFIX); } else { /*nr_normal_prefix_mod(gNB->common_vars.txdataF[aa], &txdata[aa][frame_parms->get_samples_slot_timestamp(slot,frame_parms,0)], 14, frame_parms);*/ PHY_ofdm_mod(gNB->common_vars.txdataF[aa], (int*)&txdata[aa][frame_parms->get_samples_slot_timestamp(slot,frame_parms,0)], frame_parms->ofdm_symbol_size, 1, frame_parms->nb_prefix_samples0, CYCLIC_PREFIX); apply_nr_rotation(frame_parms, (int16_t*)&txdata[aa][frame_parms->get_samples_slot_timestamp(slot,frame_parms,0)], slot, 0, 1, frame_parms->ofdm_symbol_size+frame_parms->nb_prefix_samples0); PHY_ofdm_mod(&gNB->common_vars.txdataF[aa][frame_parms->ofdm_symbol_size], (int*)&txdata[aa][frame_parms->get_samples_slot_timestamp(slot,frame_parms,0)+frame_parms->nb_prefix_samples0+frame_parms->ofdm_symbol_size], frame_parms->ofdm_symbol_size, 13, frame_parms->nb_prefix_samples, CYCLIC_PREFIX); apply_nr_rotation(frame_parms, (int16_t*)&txdata[aa][frame_parms->get_samples_slot_timestamp(slot,frame_parms,0)+frame_parms->nb_prefix_samples0+frame_parms->ofdm_symbol_size], slot, 1, 13, frame_parms->ofdm_symbol_size+frame_parms->nb_prefix_samples); } } } } LOG_M("txsigF0.m","txsF0", gNB->common_vars.txdataF[0],frame_length_complex_samples_no_prefix,1,1); if (gNB->frame_parms.nb_antennas_tx>1) LOG_M("txsigF1.m","txsF1", gNB->common_vars.txdataF[1],frame_length_complex_samples_no_prefix,1,1); } else { printf("Reading %d samples from file to antenna buffer %d\n",frame_length_complex_samples,0); UE->UE_fo_compensation = 1; // perform fo compensation when samples from file are used if (fread(txdata[0], sizeof(int32_t), frame_length_complex_samples, input_fd) != frame_length_complex_samples) { printf("error reading from file\n"); //exit(-1); } } LOG_M("txsig0.m","txs0", txdata[0],frame_length_complex_samples,1,1); if (gNB->frame_parms.nb_antennas_tx>1) LOG_M("txsig1.m","txs1", txdata[1],frame_length_complex_samples,1,1); if (output_fd) fwrite(txdata[0],sizeof(int32_t),frame_length_complex_samples,output_fd); /*int txlev = signal_energy(&txdata[0][5*frame_parms->ofdm_symbol_size + 4*frame_parms->nb_prefix_samples + frame_parms->nb_prefix_samples0], frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples); printf("txlev %d (%f)\n",txlev,10*log10(txlev));*/ for (i=0; i<frame_length_complex_samples; i++) { for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) { r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]); r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]); } } for (SNR=snr0; SNR<snr1; SNR+=.2) { n_errors = 0; n_errors_payload = 0; for (trial=0; trial<n_trials; trial++) { // multipath channel //multipath_channel(gNB2UE,s_re,s_im,r_re,r_im,frame_length_complex_samples,0); //AWGN sigma2_dB = 20*log10((double)AMP/4)-SNR; sigma2 = pow(10,sigma2_dB/10); //printf("sigma2 %f (%f dB), tx_lev %f (%f dB)\n",sigma2,sigma2_dB,txlev,10*log10((double)txlev)); if(eps!=0.0) rf_rx(r_re, // real part of txdata r_im, // imag part of txdata NULL, // interference real part NULL, // interference imag part 0, // interference power frame_parms->nb_antennas_rx, // number of rx antennas frame_length_complex_samples, // number of samples in frame 1.0e9/fs, //sampling time (ns) cfo, // frequency offset in Hz 0.0, // drift (not implemented) 0.0, // noise figure (not implemented) 0.0, // rx gain in dB ? 200, // 3rd order non-linearity in dB ? &ip, // initial phase 30.0e3, // phase noise cutoff in kHz -500.0, // phase noise amplitude in dBc 0.0, // IQ imbalance (dB), 0.0); // IQ phase imbalance (rad) for (i=0; i<frame_length_complex_samples; i++) { for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) { ((short*) UE->common_vars.rxdata[aa])[2*i] = (short) ((r_re[aa][i] + sqrt(sigma2/2)*gaussdouble(0.0,1.0))); ((short*) UE->common_vars.rxdata[aa])[2*i+1] = (short) ((r_im[aa][i] + sqrt(sigma2/2)*gaussdouble(0.0,1.0))); } } if (n_trials==1) { LOG_M("rxsig0.m","rxs0", UE->common_vars.rxdata[0],frame_parms->samples_per_frame,1,1); if (gNB->frame_parms.nb_antennas_tx>1) LOG_M("rxsig1.m","rxs1", UE->common_vars.rxdata[1],frame_parms->samples_per_frame,1,1); } if (UE->is_synchronized == 0) { UE_nr_rxtx_proc_t proc={0}; ret = nr_initial_sync(&proc, UE, 1); printf("nr_initial_sync1 returns %d\n",ret); if (ret<0) n_errors++; } else { UE_nr_rxtx_proc_t proc={0}; UE->rx_offset=0; uint8_t ssb_index = 0; while (!((SSB_positions >> ssb_index) & 0x01)) ssb_index++; // to select the first transmitted ssb UE->symbol_offset = nr_get_ssb_start_symbol(frame_parms,ssb_index); int ssb_slot = (UE->symbol_offset/14)+(n_hf*(frame_parms->slots_per_frame>>1)); for (int i=UE->symbol_offset+1; i<UE->symbol_offset+4; i++) { nr_slot_fep(UE, &proc, i%frame_parms->symbols_per_slot, ssb_slot); nr_pbch_channel_estimation(UE,&proc,0,ssb_slot,i%frame_parms->symbols_per_slot,i-(UE->symbol_offset+1),ssb_index%8,n_hf); } ret = nr_rx_pbch(UE, &proc, UE->pbch_vars[0], frame_parms, 0, ssb_index%8, SISO, UE->high_speed_flag); if (ret==0) { //UE->rx_ind.rx_indication_body->mib_pdu.ssb_index; //not yet detected automatically //UE->rx_ind.rx_indication_body->mib_pdu.ssb_length; //Lmax, not yet detected automatically uint8_t gNB_xtra_byte=0; for (int i=0; i<8; i++) gNB_xtra_byte |= ((gNB->pbch.pbch_a>>(31-i))&1)<<(7-i); payload_ret = (UE->pbch_vars[0]->xtra_byte == gNB_xtra_byte); for (i=0;i<3;i++){ payload_ret += (UE->pbch_vars[0]->decoded_output[i] == ((gNB->ssb[ssb_index].ssb_pdu.ssb_pdu_rel15.bchPayload>>(8*i)) & 0xff)); } //printf("xtra byte gNB: 0x%02x UE: 0x%02x\n",gNB_xtra_byte, UE->pbch_vars[0]->xtra_byte); //printf("ret %d\n", payload_ret); if (payload_ret!=4) n_errors_payload++; } if (ret!=0) n_errors++; } } //noise trials printf("SNR %f: trials %d, n_errors_crc = %d, n_errors_payload %d\n", SNR,n_trials,n_errors,n_errors_payload); if (((float)n_errors/(float)n_trials <= target_error_rate) && (n_errors_payload==0)) { printf("PBCH test OK\n"); break; } if (n_trials==1) break; } // NSR for (i=0; i<2; i++) { free(s_re[i]); free(s_im[i]); free(r_re[i]); free(r_im[i]); free(txdata[i]); } free(s_re); free(s_im); free(r_re); free(r_im); free(txdata); if (output_fd) fclose(output_fd); if (input_fd) fclose(input_fd); return(n_errors); }