463 lines
12 KiB
C
463 lines
12 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#include <string.h>
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#include <math.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include "SIMULATION/TOOLS/sim.h"
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#include "SIMULATION/RF/rf.h"
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#include "PHY/types.h"
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#include "PHY/defs_nr_common.h"
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#include "PHY/defs_nr_UE.h"
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#include "PHY/defs_gNB.h"
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#include "PHY/INIT/phy_init.h"
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#include "SCHED_NR/sched_nr.h"
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#include "common/ran_context.h"
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PHY_VARS_gNB *gNB;
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PHY_VARS_NR_UE *UE;
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RAN_CONTEXT_t RC;
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double cpuf;
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// dummy functions
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int nfapi_mode=0;
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int oai_nfapi_hi_dci0_req(nfapi_hi_dci0_request_t *hi_dci0_req) { return(0);}
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int oai_nfapi_tx_req(nfapi_tx_request_t *tx_req) { return(0); }
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int oai_nfapi_dl_config_req(nfapi_dl_config_request_t *dl_config_req) { return(0); }
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int oai_nfapi_ul_config_req(nfapi_ul_config_request_t *ul_config_req) { return(0); }
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int oai_nfapi_nr_dl_config_req(nfapi_nr_dl_config_request_t *dl_config_req) {return(0);}
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uint32_t from_earfcn(int eutra_bandP,uint32_t dl_earfcn) {return(0);}
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int32_t get_uldl_offset(int eutra_bandP) {return(0);}
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NR_IF_Module_t *NR_IF_Module_init(int Mod_id){return(NULL);}
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void exit_fun(const char *s) { exit(-1); }
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int main(int argc, char **argv)
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{
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char c;
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int i,l,aa;
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double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
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uint8_t snr1set=0;
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int **txdata,**txdata1,**txdata2;
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double **s_re,**s_im,**s_re1,**s_im1,**s_re2,**s_im2,**r_re,**r_im,**r_re1,**r_im1,**r_re2,**r_im2;
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double iqim = 0.0;
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unsigned char pbch_pdu[6];
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// int sync_pos, sync_pos_slot;
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// FILE *rx_frame_file;
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FILE *output_fd = NULL;
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uint8_t write_output_file=0;
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//int result;
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int freq_offset;
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// int subframe_offset;
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// char fname[40], vname[40];
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int trial, n_trials, ntrials=1, n_errors,n_errors2,n_alamouti;
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uint8_t transmission_mode = 1,n_tx=1,n_rx=1;
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uint16_t Nid_cell=0;
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int n_frames=1;
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channel_desc_t *gNB2UE;
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uint32_t nsymb,tx_lev,tx_lev1 = 0,tx_lev2 = 0;
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uint8_t extended_prefix_flag=0;
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int8_t interf1=-21,interf2=-21;
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FILE *input_fd=NULL,*pbch_file_fd=NULL;
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char input_val_str[50],input_val_str2[50];
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// double input_val1,input_val2;
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// uint16_t amask=0;
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uint8_t frame_mod4,num_pdcch_symbols = 0;
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uint16_t NB_RB=25;
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SCM_t channel_model=AWGN;//Rayleigh1_anticorr;
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//DCI_ALLOC_t dci_alloc[8];
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uint8_t abstraction_flag=0;//,calibration_flag=0;
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double pbch_sinr;
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int pbch_tx_ant;
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uint8_t N_RB_DL=106,mu=1;
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unsigned char frame_type = 0;
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unsigned char pbch_phase = 0;
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int frame=0,subframe=0;
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int frame_length_complex_samples;
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int frame_length_complex_samples_no_prefix;
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NR_DL_FRAME_PARMS *frame_parms;
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cpuf = get_cpu_freq_GHz();
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if ( load_configmodule(argc,argv) == 0) {
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exit_fun("[SOFTMODEM] Error, configuration module init failed\n");
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}
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logInit();
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while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:s:S:t:x:y:z:N:F:GR:dP:")) != -1) {
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switch (c) {
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case 'f':
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write_output_file=1;
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output_fd = fopen(optarg,"w");
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if (output_fd==NULL) {
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printf("Error opening %s\n",optarg);
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exit(-1);
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}
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break;
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case 'd':
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frame_type = 1;
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break;
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case 'g':
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switch((char)*optarg) {
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case 'A':
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channel_model=SCM_A;
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break;
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case 'B':
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channel_model=SCM_B;
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break;
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case 'C':
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channel_model=SCM_C;
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break;
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case 'D':
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channel_model=SCM_D;
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break;
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case 'E':
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channel_model=EPA;
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break;
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case 'F':
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channel_model=EVA;
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break;
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case 'G':
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channel_model=ETU;
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break;
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default:
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msg("Unsupported channel model!\n");
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exit(-1);
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}
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break;
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case 'i':
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interf1=atoi(optarg);
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break;
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case 'j':
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interf2=atoi(optarg);
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break;
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case 'n':
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n_frames = atoi(optarg);
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break;
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case 's':
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snr0 = atof(optarg);
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msg("Setting SNR0 to %f\n",snr0);
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break;
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case 'S':
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snr1 = atof(optarg);
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snr1set=1;
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msg("Setting SNR1 to %f\n",snr1);
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break;
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/*
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case 't':
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Td= atof(optarg);
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break;
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*/
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case 'p':
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extended_prefix_flag=1;
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break;
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/*
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case 'r':
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ricean_factor = pow(10,-.1*atof(optarg));
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if (ricean_factor>1) {
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printf("Ricean factor must be between 0 and 1\n");
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exit(-1);
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}
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break;
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*/
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case 'x':
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transmission_mode=atoi(optarg);
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if ((transmission_mode!=1) &&
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(transmission_mode!=2) &&
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(transmission_mode!=6)) {
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msg("Unsupported transmission mode %d\n",transmission_mode);
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exit(-1);
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}
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break;
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case 'y':
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n_tx=atoi(optarg);
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if ((n_tx==0) || (n_tx>2)) {
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msg("Unsupported number of tx antennas %d\n",n_tx);
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exit(-1);
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}
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break;
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case 'z':
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n_rx=atoi(optarg);
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if ((n_rx==0) || (n_rx>2)) {
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msg("Unsupported number of rx antennas %d\n",n_rx);
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exit(-1);
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}
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break;
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case 'A':
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abstraction_flag=1;
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ntrials=10000;
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msg("Running Abstraction test\n");
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pbch_file_fd=fopen(optarg,"r");
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if (pbch_file_fd==NULL) {
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printf("Problem with filename %s\n",optarg);
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exit(-1);
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}
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break;
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// case 'C':
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// calibration_flag=1;
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// msg("Running Abstraction calibration for Bias removal\n");
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// break;
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case 'N':
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Nid_cell = atoi(optarg);
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break;
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case 'R':
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N_RB_DL = atoi(optarg);
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break;
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case 'F':
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input_fd = fopen(optarg,"r");
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if (input_fd==NULL) {
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printf("Problem with filename %s\n",optarg);
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exit(-1);
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}
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break;
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case 'P':
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pbch_phase = atoi(optarg);
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if (pbch_phase>3)
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printf("Illegal PBCH phase (0-3) got %d\n",pbch_phase);
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break;
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default:
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case 'h':
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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",
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argv[0]);
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printf("-h This message\n");
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printf("-p Use extended prefix mode\n");
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printf("-d Use TDD\n");
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printf("-n Number of frames to simulate\n");
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printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB. If n_frames is 1 then just SNR is simulated\n");
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printf("-S Ending SNR, runs from SNR0 to SNR1\n");
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printf("-t Delay spread for multipath channel\n");
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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");
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printf("-x Transmission mode (1,2,6 for the moment)\n");
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printf("-y Number of TX antennas used in eNB\n");
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printf("-z Number of RX antennas used in UE\n");
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printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n");
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printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n");
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printf("-N Nid_cell\n");
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printf("-R N_RB_DL\n");
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printf("-O oversampling factor (1,2,4,8,16)\n");
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printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n");
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// printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n");
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printf("-f Output filename (.txt format) for Pe/SNR results\n");
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printf("-F Input filename (.txt format) for RX conformance testing\n");
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exit (-1);
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break;
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}
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}
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s_re = malloc(2*sizeof(double*));
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s_im = malloc(2*sizeof(double*));
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s_re1 = malloc(2*sizeof(double*));
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s_im1 = malloc(2*sizeof(double*));
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s_re2 = malloc(2*sizeof(double*));
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s_im2 = malloc(2*sizeof(double*));
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r_re = malloc(2*sizeof(double*));
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r_im = malloc(2*sizeof(double*));
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r_re1 = malloc(2*sizeof(double*));
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r_im1 = malloc(2*sizeof(double*));
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r_re2 = malloc(2*sizeof(double*));
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r_im2 = malloc(2*sizeof(double*));
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gNB2UE = new_channel_desc_scm(n_tx,
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n_rx,
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channel_model,
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61.44e6, //N_RB2sampling_rate(N_RB_DL),
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40e6, //N_RB2channel_bandwidth(N_RB_DL),
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0,
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0,
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0);
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if (gNB2UE==NULL) {
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msg("Problem generating channel model. Exiting.\n");
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exit(-1);
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}
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RC.gNB = (PHY_VARS_gNB***) malloc(sizeof(PHY_VARS_gNB **));
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RC.gNB[0] = (PHY_VARS_gNB**) malloc(sizeof(PHY_VARS_gNB *));
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RC.gNB[0][0] = malloc(sizeof(PHY_VARS_gNB));
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gNB = RC.gNB[0][0];
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frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
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//NR_PHY_Config_t *phy_config = malloc(sizeof(NR_PHY_Config_t));
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nr_phy_config_request_sim(gNB);
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phy_init_nr_gNB(gNB,0,0);
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frame_length_complex_samples = frame_parms->samples_per_subframe;
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frame_length_complex_samples_no_prefix = frame_parms->samples_per_subframe_wCP;
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for (i=0; i<2; i++) {
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s_re[i] = malloc(frame_length_complex_samples*sizeof(double));
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bzero(s_re[i],frame_length_complex_samples*sizeof(double));
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s_im[i] = malloc(frame_length_complex_samples*sizeof(double));
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bzero(s_im[i],frame_length_complex_samples*sizeof(double));
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r_re[i] = malloc(frame_length_complex_samples*sizeof(double));
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bzero(r_re[i],frame_length_complex_samples*sizeof(double));
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r_im[i] = malloc(frame_length_complex_samples*sizeof(double));
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bzero(r_im[i],frame_length_complex_samples*sizeof(double));
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}
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if (pbch_file_fd!=NULL) {
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load_pbch_desc(pbch_file_fd);
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}
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if (input_fd==NULL) {
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nr_common_signal_procedures (gNB,frame,subframe);
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}
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LOG_M("txsigF0.m","txsF0", gNB->common_vars.txdataF[0],frame_length_complex_samples_no_prefix,1,1);
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if (gNB->frame_parms.nb_antennas_tx>1)
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LOG_M("txsigF1.m","txsF1", gNB->common_vars.txdataF[1],frame_length_complex_samples_no_prefix,1,1);
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// multipath channel
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/*
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for (i=0; i<frame_length_complex_samples; i++) {
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for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
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s_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
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s_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
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}
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}
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*/
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for (SNR=snr0; SNR<snr1; SNR+=.2) {
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n_errors = 0;
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n_errors2 = 0;
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n_alamouti = 0;
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for (trial=0; trial<n_trials; trial++) {
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multipath_channel(gNB2UE,s_re,s_im,r_re,r_im,frame_length_complex_samples,0);
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sigma2_dB = 10*log10((double)tx_lev) +10*log10((double)gNB->frame_parms.ofdm_symbol_size/(double)(12*NB_RB)) - SNR;
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if (n_frames==1)
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printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f,%f,%f\n",sigma2_dB,SNR,
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10*log10((double)tx_lev),
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10*log10((double)tx_lev1),
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10*log10((double)tx_lev2));
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//AWGN
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sigma2 = pow(10,sigma2_dB/10);
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//printf("n_trial %d\n",n_trials);
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for (i=0; i<frame_length_complex_samples; i++) {
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for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
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((short*) UE->common_vars.rxdata[aa])[2*i] = (short) ((r_re[aa][i] +sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
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((short*) UE->common_vars.rxdata[aa])[2*i+1] = (short) ((r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
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}
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}
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} //noise trials
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} // NSR
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for (i=0; i<2; i++) {
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free(s_re[i]);
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free(s_im[i]);
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free(r_re[i]);
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free(r_im[i]);
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}
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free(s_re);
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free(s_im);
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free(r_re);
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free(r_im);
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if (write_output_file)
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fclose(output_fd);
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return(n_errors);
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}
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