/* * 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 "SIMULATION/TOOLS/sim.h" #include "SIMULATION/RF/rf.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/INIT/phy_init.h" #include "PHY/NR_TRANSPORT/nr_transport.h" #include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h" #include "SCHED_NR/sched_nr.h" PHY_VARS_gNB *gNB; PHY_VARS_NR_UE *UE; RAN_CONTEXT_t RC; double cpuf; // dummy functions int nfapi_mode=0; int oai_nfapi_hi_dci0_req(nfapi_hi_dci0_request_t *hi_dci0_req) { return(0);} int oai_nfapi_tx_req(nfapi_tx_request_t *tx_req) { return(0); } int oai_nfapi_dl_config_req(nfapi_dl_config_request_t *dl_config_req) { return(0); } int oai_nfapi_ul_config_req(nfapi_ul_config_request_t *ul_config_req) { return(0); } int oai_nfapi_nr_dl_config_req(nfapi_nr_dl_config_request_t *dl_config_req) {return(0);} uint32_t from_earfcn(int eutra_bandP,uint32_t dl_earfcn) {return(0);} int32_t get_uldl_offset(int eutra_bandP) {return(0);} NR_IF_Module_t *NR_IF_Module_init(int Mod_id){return(NULL);} void exit_function(const char* file, const char* function, const int line,const char *s) { const char * msg= s==NULL ? "no comment": s; printf("Exiting at: %s:%d %s(), %s\n", file, line, function, msg); exit(-1); } // needed for some functions PHY_VARS_NR_UE * PHY_vars_UE_g[1][1]={{NULL}}; int main(int argc, char **argv) { char c; int i,l,aa; double sigma2, sigma2_dB=10,SNR,snr0=-2.0,snr1=2.0; uint8_t snr1set=0; int **txdata; double **s_re,**s_im,**r_re,**r_im; double iqim = 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,n_errors2,n_alamouti; uint8_t transmission_mode = 1,n_tx=1,n_rx=1; uint16_t Nid_cell=0; channel_desc_t *gNB2UE; uint32_t nsymb,tx_lev,tx_lev1 = 0,tx_lev2 = 0; uint8_t extended_prefix_flag=0; int8_t interf1=-21,interf2=-21; FILE *input_fd=NULL,*pbch_file_fd=NULL; char input_val_str[50],input_val_str2[50]; uint8_t frame_mod4,num_pdcch_symbols = 0; SCM_t channel_model=AWGN;//Rayleigh1_anticorr; double pbch_sinr; int pbch_tx_ant; int N_RB_DL=273,mu=1; unsigned char frame_type = 0; unsigned char pbch_phase = 0; int frame=0,subframe=0; int frame_length_complex_samples; int frame_length_complex_samples_no_prefix; NR_DL_FRAME_PARMS *frame_parms; nfapi_nr_config_request_t *gNB_config; int ret; int run_initial_sync=0; int loglvl=OAILOG_WARNING; cpuf = get_cpu_freq_GHz(); if ( load_configmodule(argc,argv) == 0) { exit_fun("[SOFTMODEM] Error, configuration module init failed\n"); } randominit(0); while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:s:S:t:x:y:z:N:F:GR:dP:IL:")) != -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: msg("Unsupported channel model!\n"); exit(-1); } break; case 'i': interf1=atoi(optarg); break; case 'j': interf2=atoi(optarg); break; case 'n': n_trials = atoi(optarg); break; case 's': snr0 = atof(optarg); msg("Setting SNR0 to %f\n",snr0); break; case 'S': snr1 = atof(optarg); snr1set=1; msg("Setting SNR1 to %f\n",snr1); 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)) { msg("Unsupported transmission mode %d\n",transmission_mode); exit(-1); } break; case 'y': n_tx=atoi(optarg); if ((n_tx==0) || (n_tx>2)) { msg("Unsupported number of tx antennas %d\n",n_tx); exit(-1); } break; case 'z': n_rx=atoi(optarg); if ((n_rx==0) || (n_rx>2)) { msg("Unsupported number of rx antennas %d\n",n_rx); exit(-1); } 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\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; break; case 'L': loglvl = 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("-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("-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] = (PHY_VARS_gNB**) malloc(sizeof(PHY_VARS_gNB *)); RC.gNB[0][0] = malloc(sizeof(PHY_VARS_gNB)); gNB = RC.gNB[0][0]; gNB_config = &gNB->gNB_config; 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->N_RB_UL = N_RB_DL; nr_phy_config_request_sim(gNB,N_RB_DL,N_RB_DL,mu); phy_init_nr_gNB(gNB,0,0); double fs,bw; if (mu == 1 && N_RB_DL == 217) { fs = 122.88e6; bw = 80e6; } else if (mu == 1 && N_RB_DL == 245) { fs = 122.88e6; bw = 90e6; } else if (mu == 1 && N_RB_DL == 273) { fs = 122.88e6; bw = 100e6; } else if (mu == 1 && 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); gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model, fs, bw, 0, 0, 0); if (gNB2UE==NULL) { msg("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); if (run_initial_sync==1) UE->is_synchronized = 0; else UE->is_synchronized = 1; UE->perfect_ce = 0; 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) { gNB->pbch_configured = 1; for (int i=0;i<4;i++) gNB->pbch_pdu[i]=i+1; nr_common_signal_procedures (gNB,frame,subframe); /* 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); */ //TODO: loop over slots for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) { if (gNB_config->subframe_config.dl_cyclic_prefix_type.value == 1) { PHY_ofdm_mod(gNB->common_vars.txdataF[aa], txdata[aa], 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], 14, frame_parms); } } } else { printf("Reading %d samples from file to antenna buffer %d\n",frame_length_complex_samples,0); 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_errors2 = 0; n_alamouti = 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 = 10*log10((double)txlev)-SNR; sigma2 = pow(10,sigma2_dB/10); // printf("sigma2 %f (%f dB)\n",sigma2,sigma2_dB); 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_length_complex_samples,1,1); if (gNB->frame_parms.nb_antennas_tx>1) LOG_M("rxsig1.m","rxs1", UE->common_vars.rxdata[1],frame_length_complex_samples,1,1); } if (UE->is_synchronized == 0) { ret = nr_initial_sync(UE, normal_txrx); printf("nr_initial_sync1 returns %d\n",ret); if (ret<0) n_errors++; } else { UE->rx_offset=0; //symbol 1 nr_slot_fep(UE, 5, 0, 0, 0, 1, NR_PBCH_EST); //symbol 2 nr_slot_fep(UE, 6, 0, 0, 0, 1, NR_PBCH_EST); //symbol 3 nr_slot_fep(UE, 7, 0, 0, 0, 1, NR_PBCH_EST); ret = nr_rx_pbch(UE, &UE->proc.proc_rxtx[0], UE->pbch_vars[0], frame_parms, 0, SISO, UE->high_speed_flag); if (ret<0) n_errors++; } } //noise trials printf("SNR %f : n_errors (negative CRC) = %d/%d\n", SNR,n_errors,n_trials); 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); }