532 lines
17 KiB
C
532 lines
17 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 "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.h"
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#include "PHY/vars.h"
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#include "SCHED/defs.h"
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#include "SCHED/vars.h"
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#include "LAYER2/MAC/vars.h"
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#include "OCG_vars.h"
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#include "unitary_defs.h"
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int current_dlsch_cqi; //FIXME!
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PHY_VARS_eNB *eNB;
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PHY_VARS_UE *UE;
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#define DLSCH_RB_ALLOC 0x1fbf // igore DC component,RB13
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double cpuf;
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extern uint16_t prach_root_sequence_map0_3[838];
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void dump_prach_config(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);
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int main(int argc, char **argv) {
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char c;
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int i,aa,aarx;
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double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1=0.0,ue_speed0=0.0,ue_speed1=0.0;
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uint8_t snr1set=0;
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uint8_t ue_speed1set=0;
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//mod_sym_t **txdataF;
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int **txdata;
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double **s_re,**s_im,**r_re,**r_im;
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double iqim=0.0;
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int trial; //, ntrials=1;
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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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uint8_t awgn_flag=0;
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uint8_t hs_flag=0;
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int n_frames=1;
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channel_desc_t *UE2eNB;
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uint32_t nsymb,tx_lev; //,tx_lev_dB;
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uint8_t extended_prefix_flag=0;
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// int8_t interf1=-19,interf2=-19;
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LTE_DL_FRAME_PARMS *frame_parms;
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SCM_t channel_model=Rayleigh1;
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// uint8_t abstraction_flag=0,calibration_flag=0;
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// double prach_sinr;
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uint8_t osf=1,N_RB_DL=25;
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uint32_t prach_errors=0;
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uint8_t subframe=3;
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uint16_t preamble_energy_list[64],preamble_tx=99,preamble_delay_list[64];
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uint16_t preamble_max,preamble_energy_max;
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PRACH_RESOURCES_t prach_resources;
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//uint8_t prach_fmt;
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//int N_ZC;
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int delay = 0;
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double delay_avg=0;
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double ue_speed = 0;
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int NCS_config = 1,rootSequenceIndex=0;
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int threequarter_fs = 0;
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cpuf = get_cpu_freq_GHz();
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logInit();
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number_of_cards = 1;
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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) {
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switch (c) {
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case 'a':
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printf("Running AWGN simulation\n");
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awgn_flag = 1;
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/* ntrials not used later, no need to set */
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//ntrials=1;
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break;
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case 'd':
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delay = atoi(optarg);
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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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case 'H':
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channel_model=Rayleigh8;
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break;
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case 'I':
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channel_model=Rayleigh1;
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break;
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case 'J':
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channel_model=Rayleigh1_corr;
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break;
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case 'K':
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channel_model=Rayleigh1_anticorr;
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break;
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case 'L':
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channel_model=Rice8;
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break;
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case 'M':
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channel_model=Rice1;
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break;
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case 'N':
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channel_model=Rayleigh1_800;
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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 'E':
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threequarter_fs=1;
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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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case 'p':
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preamble_tx=atoi(optarg);
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break;
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case 'v':
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ue_speed0 = atoi(optarg);
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break;
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case 'V':
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ue_speed1 = atoi(optarg);
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ue_speed1set = 1;
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break;
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case 'Z':
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NCS_config = atoi(optarg);
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if ((NCS_config > 15) || (NCS_config < 0))
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printf("Illegal NCS_config %d, (should be 0-15)\n",NCS_config);
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break;
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case 'H':
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printf("High-Speed Flag enabled\n");
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hs_flag = 1;
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break;
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case 'L':
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rootSequenceIndex = atoi(optarg);
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if ((rootSequenceIndex < 0) || (rootSequenceIndex > 837))
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printf("Illegal rootSequenceNumber %d, (should be 0-837)\n",rootSequenceIndex);
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break;
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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 '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 'O':
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osf = atoi(optarg);
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break;
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case 'F':
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break;
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default:
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case 'h':
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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",
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argv[0]);
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printf("-h This message\n");
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printf("-a Use AWGN channel and not multipath\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("-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");
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printf("-z Number of RX antennas used in eNB\n");
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printf("-N Nid_cell\n");
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printf("-O oversampling factor (1,2,4,8,16)\n");
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// printf("-f PRACH format (0=1,1=2,2=3,3=4)\n");
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printf("-d Channel delay \n");
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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");
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printf("-V Ending UE velocity in km/h, runs from 'v' to 'V'");
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printf("-L rootSequenceIndex (0-837)\n");
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printf("-Z NCS_config (ZeroCorrelationZone) (0-15)\n");
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printf("-H Run with High-Speed Flag enabled \n");
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printf("-R Number of PRB (6,15,25,50,75,100)\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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if (transmission_mode==2)
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n_tx=2;
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lte_param_init(n_tx,
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n_tx,
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n_rx,
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transmission_mode,
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extended_prefix_flag,
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FDD,
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Nid_cell,
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3,
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N_RB_DL,
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threequarter_fs,
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osf,
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0);
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if (snr1set==0) {
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if (n_frames==1)
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snr1 = snr0+.1;
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else
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snr1 = snr0+5.0;
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}
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if (ue_speed1set==0) {
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if (n_frames==1)
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ue_speed1 = ue_speed0+10;
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else
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ue_speed1 = ue_speed0+50;
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}
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printf("SNR0 %f, SNR1 %f\n",snr0,snr1);
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frame_parms = &eNB->frame_parms;
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txdata = UE->common_vars.txdata;
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printf("txdata %p\n",&txdata[0][subframe*frame_parms->samples_per_tti]);
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s_re = malloc(2*sizeof(double *));
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s_im = 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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nsymb = (frame_parms->Ncp == 0) ? 14 : 12;
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printf("FFT Size %d, Extended Prefix %d, Samples per subframe %d, Symbols per subframe %d\n",NUMBER_OF_OFDM_CARRIERS,
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frame_parms->Ncp,frame_parms->samples_per_tti,nsymb);
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msg("[SIM] Using SCM/101\n");
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UE2eNB = new_channel_desc_scm(UE->frame_parms.nb_antennas_tx,
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eNB->frame_parms.nb_antennas_rx,
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channel_model,
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N_RB2sampling_rate(eNB->frame_parms.N_RB_UL),
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N_RB2channel_bandwidth(eNB->frame_parms.N_RB_UL),
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0.0,
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delay,
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0, 0);
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if (UE2eNB==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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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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UE->frame_parms.prach_config_common.rootSequenceIndex=rootSequenceIndex;
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UE->frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex=0;
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UE->frame_parms.prach_config_common.prach_ConfigInfo.zeroCorrelationZoneConfig=NCS_config;
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UE->frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=hs_flag;
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UE->frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
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eNB->frame_parms.prach_config_common.rootSequenceIndex=rootSequenceIndex;
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eNB->frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex=0;
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eNB->frame_parms.prach_config_common.prach_ConfigInfo.zeroCorrelationZoneConfig=NCS_config;
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eNB->frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=hs_flag;
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eNB->frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
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eNB->node_function = eNodeB_3GPP;
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eNB->proc.subframe_rx = subframe;
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eNB->proc.subframe_prach = subframe;
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/* N_ZC not used later, so prach_fmt is also useless, don't set */
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//prach_fmt = get_prach_fmt(eNB->frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex,
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// eNB->frame_parms.frame_type);
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/* N_ZC not used later, no need to set */
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//N_ZC = (prach_fmt <4)?839:139;
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compute_prach_seq(&eNB->frame_parms.prach_config_common,eNB->frame_parms.frame_type,eNB->X_u);
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compute_prach_seq(&UE->frame_parms.prach_config_common,UE->frame_parms.frame_type,UE->X_u);
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UE->prach_vars[0]->amp = AMP;
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UE->prach_resources[0] = &prach_resources;
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if (preamble_tx == 99)
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preamble_tx = (uint16_t)(taus()&0x3f);
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if (n_frames == 1)
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printf("raPreamble %d\n",preamble_tx);
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UE->prach_resources[0]->ra_PreambleIndex = preamble_tx;
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UE->prach_resources[0]->ra_TDD_map_index = 0;
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tx_lev = generate_prach(UE,
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0, //eNB_id,
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subframe,
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0); //Nf
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/* tx_lev_dB not used later, no need to set */
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//tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
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LOG_M("txsig0_new.m","txs0", &txdata[0][subframe*frame_parms->samples_per_tti],frame_parms->samples_per_tti,1,1);
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//LOG_M("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
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// multipath channel
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dump_prach_config(&eNB->frame_parms,subframe);
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for (i=0; i<2*frame_parms->samples_per_tti; i++) {
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for (aa=0; aa<1; aa++) {
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if (awgn_flag == 0) {
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s_re[aa][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)]);
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s_im[aa][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)+1]);
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} else {
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for (aarx=0; aarx<eNB->frame_parms.nb_antennas_rx; aarx++) {
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if (aa==0) {
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r_re[aarx][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)]);
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r_im[aarx][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)+1]);
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} else {
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r_re[aarx][i] += ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)]);
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r_im[aarx][i] += ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)+1]);
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}
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}
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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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for (ue_speed=ue_speed0; ue_speed<ue_speed1; ue_speed+=10) {
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delay_avg = 0.0;
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// max Doppler shift
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UE2eNB->max_Doppler = 1.9076e9*(ue_speed/3.6)/3e8;
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printf("n_frames %d SNR %f\n",n_frames,SNR);
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prach_errors=0;
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for (trial=0; trial<n_frames; trial++) {
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sigma2_dB = 10*log10((double)tx_lev) - SNR;
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if (n_frames==1)
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printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f\n",sigma2_dB,SNR,10*log10((double)tx_lev));
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//AWGN
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sigma2 = pow(10,sigma2_dB/10);
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// printf("Sigma2 %f (sigma2_dB %f)\n",sigma2,sigma2_dB);
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if (awgn_flag == 0) {
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multipath_tv_channel(UE2eNB,s_re,s_im,r_re,r_im,
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2*frame_parms->samples_per_tti,0);
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}
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if (n_frames==1) {
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printf("rx_level data symbol %f, tx_lev %f\n",
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10*log10(signal_energy_fp(r_re,r_im,1,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0)),
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10*log10(tx_lev));
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}
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for (i=0; i<frame_parms->samples_per_tti; i++) {
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for (aa=0; aa<eNB->frame_parms.nb_antennas_rx; aa++) {
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((short *) &eNB->common_vars.rxdata[0][aa][subframe*frame_parms->samples_per_tti])[2*i] = (short) (.167*(r_re[aa][i] +sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
|
|
((short *) &eNB->common_vars.rxdata[0][aa][subframe*frame_parms->samples_per_tti])[2*i+1] = (short) (.167*(r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
|
|
}
|
|
}
|
|
|
|
rx_prach(eNB,
|
|
preamble_energy_list,
|
|
preamble_delay_list,
|
|
0, //Nf
|
|
0); //tdd_mapindex
|
|
preamble_energy_max = preamble_energy_list[0];
|
|
preamble_max = 0;
|
|
|
|
for (i=1; i<64; i++) {
|
|
if (preamble_energy_max < preamble_energy_list[i]) {
|
|
// printf("preamble %d => %d\n",i,preamble_energy_list[i]);
|
|
preamble_energy_max = preamble_energy_list[i];
|
|
preamble_max = i;
|
|
}
|
|
}
|
|
|
|
if (preamble_max!=preamble_tx)
|
|
prach_errors++;
|
|
else {
|
|
delay_avg += (double)preamble_delay_list[preamble_max];
|
|
}
|
|
|
|
if (n_frames==1) {
|
|
for (i=0; i<64; i++)
|
|
if (i==preamble_tx)
|
|
printf("****** preamble %d : energy %d, delay %d\n",i,preamble_energy_list[i],preamble_delay_list[i]);
|
|
else
|
|
printf("preamble %d : energy %d, delay %d\n",i,preamble_energy_list[i],preamble_delay_list[i]);
|
|
|
|
LOG_M("prach0.m","prach0", &txdata[0][subframe*frame_parms->samples_per_tti],frame_parms->samples_per_tti,1,1);
|
|
LOG_M("prachF0.m","prachF0", &eNB->prach_vars.prachF[0],24576,1,1);
|
|
LOG_M("rxsig0.m","rxs0",
|
|
&eNB->common_vars.rxdata[0][0][subframe*frame_parms->samples_per_tti],
|
|
frame_parms->samples_per_tti,1,1);
|
|
LOG_M("rxsigF0.m","rxsF0", eNB->prach_vars.rxsigF[0],6144,1,1);
|
|
LOG_M("prach_preamble.m","prachp",&eNB->X_u[0],839,1,1);
|
|
}
|
|
}
|
|
|
|
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));
|
|
//printf("(%f,%f)\n",ue_speed,(double)prach_errors/(double)n_frames);
|
|
} // UE Speed loop
|
|
|
|
//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));
|
|
// printf("(%f,%f)\n",SNR,(double)prach_errors/(double)n_frames);
|
|
} //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);
|
|
lte_sync_time_free();
|
|
return(0);
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
for (i=1;i<4;i++)
|
|
memcpy((void *)&PHY_vars->tx_vars[0].TX_DMA_BUFFER[i*12*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES_NO_PREFIX*2],
|
|
(void *)&PHY_vars->tx_vars[0].TX_DMA_BUFFER[0],
|
|
12*OFDM_SYMBOL_SIZE_SAMPLES_NO_PREFIX*2);
|
|
*/
|
|
|