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/*******************************************************************************
OpenAirInterface
Copyright(c) 1999 - 2014 Eurecom
OpenAirInterface is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenAirInterface is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OpenAirInterface.The full GNU General Public License is
included in this distribution in the file called "COPYING". If not,
see <http://www.gnu.org/licenses/>.
Contact Information
OpenAirInterface Admin: openair_admin@eurecom.fr
OpenAirInterface Tech : openair_tech@eurecom.fr
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
*******************************************************************************/
#include <string.h>
#include <math.h>
#include <unistd.h>
#include "SIMULATION/TOOLS/defs.h"
#include "SIMULATION/RF/defs.h"
#include "PHY/types.h"
#include "PHY/defs.h"
#include "PHY/vars.h"
#ifdef EMOS
#include "SCHED/phy_procedures_emos.h"
#endif
#include "SCHED/defs.h"
#include "SCHED/vars.h"
#include "LAYER2/MAC/vars.h"
#include "OCG_vars.h"
int current_dlsch_cqi; //FIXME!
PHY_VARS_eNB *PHY_vars_eNB;
PHY_VARS_UE *PHY_vars_UE;
#define DLSCH_RB_ALLOC 0x1fbf // igore DC component,RB13
extern uint16_t prach_root_sequence_map0_3[838];
void dump_prach_config(LTE_DL_FRAME_PARMS *frame_parms,uint8_t subframe);
int main(int argc, char **argv)
{
char c;
int i,aa,aarx;
double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1=0.0,ue_speed0=0.0,ue_speed1=0.0;
uint8_t snr1set=0;
uint8_t ue_speed1set=0;
//mod_sym_t **txdataF;
int **txdata;
double **s_re,**s_im,**r_re,**r_im;
double iqim=0.0;
int trial; //, ntrials=1;
uint8_t transmission_mode = 1,n_tx=1,n_rx=1;
uint16_t Nid_cell=0;
uint8_t awgn_flag=0;
uint8_t hs_flag=0;
int n_frames=1;
channel_desc_t *UE2eNB;
uint32_t nsymb,tx_lev; //,tx_lev_dB;
uint8_t extended_prefix_flag=0;
// int8_t interf1=-19,interf2=-19;
LTE_DL_FRAME_PARMS *frame_parms;
#ifdef EMOS
fifo_dump_emos emos_dump;
#endif
SCM_t channel_model=Rayleigh1;
// uint8_t abstraction_flag=0,calibration_flag=0;
// double prach_sinr;
uint8_t osf=1,N_RB_DL=25;
uint32_t prach_errors=0;
uint8_t subframe=3;
uint16_t preamble_energy_list[64],preamble_tx=99,preamble_delay_list[64];
uint16_t preamble_max,preamble_energy_max;
PRACH_RESOURCES_t prach_resources;
//uint8_t prach_fmt;
//int N_ZC;
int delay = 0;
double delay_avg=0;
double ue_speed = 0;
int NCS_config = 1,rootSequenceIndex=0;
logInit();
number_of_cards = 1;
openair_daq_vars.rx_rf_mode = 1;
/*
rxdataF = (int **)malloc16(2*sizeof(int*));
rxdataF[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
rxdataF[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
rxdata = (int **)malloc16(2*sizeof(int*));
rxdata[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
rxdata[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
*/
while ((c = getopt (argc, argv, "hHaA:Cr:p:g:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:")) != -1) {
switch (c) {
case 'a':
printf("Running AWGN simulation\n");
awgn_flag = 1;
/* ntrials not used later, no need to set */
//ntrials=1;
break;
case 'd':
delay = atoi(optarg);
break;
case 'g':
switch((char)*optarg) {
case 'A':
channel_model=SCM_A;
break;
case 'B':
channel_model=SCM_B;
break;
case 'C':
channel_model=SCM_C;
break;
case 'D':
channel_model=SCM_D;
break;
case 'E':
channel_model=EPA;
break;
case 'F':
channel_model=EVA;
break;
case 'G':
channel_model=ETU;
break;
case 'H':
channel_model=Rayleigh8;
case 'I':
channel_model=Rayleigh1;
case 'J':
channel_model=Rayleigh1_corr;
case 'K':
channel_model=Rayleigh1_anticorr;
case 'L':
channel_model=Rice8;
case 'M':
channel_model=Rice1;
case 'N':
channel_model=Rayleigh1_800;
break;
default:
msg("Unsupported channel model!\n");
exit(-1);
}
break;
case 'n':
n_frames = 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 'p':
preamble_tx=atoi(optarg);
break;
case 'v':
ue_speed0 = atoi(optarg);
break;
case 'V':
ue_speed1 = atoi(optarg);
ue_speed1set = 1;
break;
case 'Z':
NCS_config = atoi(optarg);
if ((NCS_config > 15) || (NCS_config < 0))
printf("Illegal NCS_config %d, (should be 0-15)\n",NCS_config);
break;
case 'H':
printf("High-Speed Flag enabled\n");
hs_flag = 1;
break;
case 'L':
rootSequenceIndex = atoi(optarg);
if ((rootSequenceIndex < 0) || (rootSequenceIndex > 837))
printf("Illegal rootSequenceNumber %d, (should be 0-837)\n",rootSequenceIndex);
break;
case 'x':
transmission_mode=atoi(optarg);
if ((transmission_mode!=1) &&
(transmission_mode!=2) &&
(transmission_mode!=6)) {
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 'O':
osf = atoi(optarg);
break;
case 'F':
break;
default:
case 'h':
printf("%s -h(elp) -a(wgn on) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n",
argv[0]);
printf("-h This message\n");
printf("-a Use AWGN channel and not multipath\n");
printf("-n Number of frames to simulate\n");
printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB. If n_frames is 1 then just SNR is simulated\n");
printf("-S Ending SNR, runs from SNR0 to SNR1\n");
printf("-g [A,B,C,D,E,F,G,I,N] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) or Rayleigh1 (I) or Rayleigh1_800 (N) models (ignores delay spread and Ricean factor)\n");
printf("-z Number of RX antennas used in eNB\n");
printf("-N Nid_cell\n");
printf("-O oversampling factor (1,2,4,8,16)\n");
// printf("-f PRACH format (0=1,1=2,2=3,3=4)\n");
printf("-d Channel delay \n");
printf("-v Starting UE velocity in km/h, runs from 'v' to 'v+50km/h'. If n_frames is 1 just 'v' is simulated \n");
printf("-V Ending UE velocity in km/h, runs from 'v' to 'V'");
printf("-L rootSequenceIndex (0-837)\n");
printf("-Z NCS_config (ZeroCorrelationZone) (0-15)\n");
printf("-H Run with High-Speed Flag enabled \n");
printf("-R Number of PRB (6,15,25,50,75,100)\n");
printf("-F Input filename (.txt format) for RX conformance testing\n");
exit (-1);
break;
}
}
if (transmission_mode==2)
n_tx=2;
lte_param_init(n_tx,
n_rx,
transmission_mode,
extended_prefix_flag,
FDD,
Nid_cell,
3,
N_RB_DL,
0,
osf,
0);
if (snr1set==0) {
if (n_frames==1)
snr1 = snr0+.1;
else
snr1 = snr0+5.0;
}
if (ue_speed1set==0) {
if (n_frames==1)
ue_speed1 = ue_speed0+10;
else
ue_speed1 = ue_speed0+50;
}
printf("SNR0 %f, SNR1 %f\n",snr0,snr1);
frame_parms = &PHY_vars_eNB->lte_frame_parms;
txdata = PHY_vars_UE->lte_ue_common_vars.txdata;
printf("txdata %p\n",&txdata[0][subframe*frame_parms->samples_per_tti]);
s_re = malloc(2*sizeof(double*));
s_im = malloc(2*sizeof(double*));
r_re = malloc(2*sizeof(double*));
r_im = malloc(2*sizeof(double*));
nsymb = (frame_parms->Ncp == 0) ? 14 : 12;
printf("FFT Size %d, Extended Prefix %d, Samples per subframe %d, Symbols per subframe %d\n",NUMBER_OF_OFDM_CARRIERS,
frame_parms->Ncp,frame_parms->samples_per_tti,nsymb);
msg("[SIM] Using SCM/101\n");
UE2eNB = new_channel_desc_scm(PHY_vars_UE->lte_frame_parms.nb_antennas_tx,
PHY_vars_eNB->lte_frame_parms.nb_antennas_rx,
channel_model,
N_RB2sampling_rate(PHY_vars_eNB->lte_frame_parms.N_RB_UL),
N_RB2channel_bandwidth(PHY_vars_eNB->lte_frame_parms.N_RB_UL),
0.0,
delay,
0);
if (UE2eNB==NULL) {
msg("Problem generating channel model. Exiting.\n");
exit(-1);
}
for (i=0; i<2; i++) {
s_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_re[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_im[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_re[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_im[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
}
PHY_vars_UE->lte_frame_parms.prach_config_common.rootSequenceIndex=rootSequenceIndex;
PHY_vars_UE->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex=0;
PHY_vars_UE->lte_frame_parms.prach_config_common.prach_ConfigInfo.zeroCorrelationZoneConfig=NCS_config;
PHY_vars_UE->lte_frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=hs_flag;
PHY_vars_UE->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
PHY_vars_eNB->lte_frame_parms.prach_config_common.rootSequenceIndex=rootSequenceIndex;
PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex=0;
PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.zeroCorrelationZoneConfig=NCS_config;
PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=hs_flag;
PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
/* N_ZC not used later, so prach_fmt is also useless, don't set */
//prach_fmt = get_prach_fmt(PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_ConfigIndex,
// PHY_vars_eNB->lte_frame_parms.frame_type);
/* N_ZC not used later, no need to set */
//N_ZC = (prach_fmt <4)?839:139;
compute_prach_seq(&PHY_vars_eNB->lte_frame_parms.prach_config_common,PHY_vars_eNB->lte_frame_parms.frame_type,PHY_vars_eNB->X_u);
compute_prach_seq(&PHY_vars_UE->lte_frame_parms.prach_config_common,PHY_vars_UE->lte_frame_parms.frame_type,PHY_vars_UE->X_u);
PHY_vars_UE->lte_ue_prach_vars[0]->amp = AMP;
PHY_vars_UE->prach_resources[0] = &prach_resources;
if (preamble_tx == 99)
preamble_tx = (uint16_t)(taus()&0x3f);
if (n_frames == 1)
printf("raPreamble %d\n",preamble_tx);
PHY_vars_UE->prach_resources[0]->ra_PreambleIndex = preamble_tx;
PHY_vars_UE->prach_resources[0]->ra_TDD_map_index = 0;
tx_lev = generate_prach(PHY_vars_UE,
0, //eNB_id,
subframe,
0); //Nf
/* tx_lev_dB not used later, no need to set */
//tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
write_output("txsig0_new.m","txs0", &txdata[0][subframe*frame_parms->samples_per_tti],frame_parms->samples_per_tti,1,1);
//write_output("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
// multipath channel
dump_prach_config(&PHY_vars_eNB->lte_frame_parms,subframe);
for (i=0; i<2*frame_parms->samples_per_tti; i++) {
for (aa=0; aa<1; aa++) {
if (awgn_flag == 0) {
s_re[aa][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)]);
s_im[aa][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)+1]);
} else {
for (aarx=0; aarx<PHY_vars_eNB->lte_frame_parms.nb_antennas_rx; aarx++) {
if (aa==0) {
r_re[aarx][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)]);
r_im[aarx][i] = ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)+1]);
} else {
r_re[aarx][i] += ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)]);
r_im[aarx][i] += ((double)(((short *)&txdata[aa][subframe*frame_parms->samples_per_tti]))[(i<<1)+1]);
}
}
}
}
}
for (SNR=snr0; SNR<snr1; SNR+=.2) {
for (ue_speed=ue_speed0; ue_speed<ue_speed1; ue_speed+=10) {
delay_avg = 0.0;
// max Doppler shift
UE2eNB->max_Doppler = 1.9076e9*(ue_speed/3.6)/3e8;
printf("n_frames %d SNR %f\n",n_frames,SNR);
prach_errors=0;
for (trial=0; trial<n_frames; trial++) {
sigma2_dB = 10*log10((double)tx_lev) - SNR;
if (n_frames==1)
printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f\n",sigma2_dB,SNR,10*log10((double)tx_lev));
//AWGN
sigma2 = pow(10,sigma2_dB/10);
// printf("Sigma2 %f (sigma2_dB %f)\n",sigma2,sigma2_dB);
if (awgn_flag == 0) {
multipath_tv_channel(UE2eNB,s_re,s_im,r_re,r_im,
2*frame_parms->samples_per_tti,0);
}
if (n_frames==1) {
printf("rx_level data symbol %f, tx_lev %f\n",
10*log10(signal_energy_fp(r_re,r_im,1,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0)),
10*log10(tx_lev));
}
for (i=0; i<frame_parms->samples_per_tti; i++) {
for (aa=0; aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_rx; aa++) {
((short*) &PHY_vars_eNB->lte_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*) &PHY_vars_eNB->lte_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(PHY_vars_eNB,
subframe,
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]);
write_output("prach0.m","prach0", &txdata[0][subframe*frame_parms->samples_per_tti],frame_parms->samples_per_tti,1,1);
write_output("prachF0.m","prachF0", &PHY_vars_eNB->lte_eNB_prach_vars.prachF[0],24576,1,1);
write_output("rxsig0.m","rxs0",
&PHY_vars_eNB->lte_eNB_common_vars.rxdata[0][0][subframe*frame_parms->samples_per_tti],
frame_parms->samples_per_tti,1,1);
write_output("rxsigF0.m","rxsF0", &PHY_vars_eNB->lte_eNB_common_vars.rxdataF[0][0][0],512*nsymb*2,2,1);
write_output("prach_preamble.m","prachp",&PHY_vars_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);
*/