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e337a52ee2ced5c8a88685bd529ec2b8a162dc57
openairinterface5g/openair1/SIMULATION/LTE_RELAY/relay_DF_sim.c
T
ghaddab 56c3197b09 License Corrected 
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5713 818b1a75-f10b-46b9-bf7c-635c3b92a50f
2014-08-13 16:22:56 +00:00

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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@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 <execinfo.h>
#include <signal.h>
#include "SIMULATION/TOOLS/defs.h"
#include "PHY/types.h"
#include "PHY/defs.h"
#include "PHY/vars.h"
#include "MAC_INTERFACE/vars.h"
#ifdef IFFT_FPGA
#include "PHY/LTE_REFSIG/mod_table.h"
#endif
#include "ARCH/CBMIMO1/DEVICE_DRIVER/vars.h"
#include "SCHED/defs.h"
#include "SCHED/vars.h"
#include "LAYER2/MAC/vars.h"
#include "OCG_vars.h"
#ifdef XFORMS
#include "forms.h"
#include "../../USERSPACE_TOOLS/SCOPE/lte_scope.h"
#endif
//#define AWGN
//#define NO_DCI
#define BW 7.68
/*
#define RBmask0 0x00fc00fc
#define RBmask1 0x0
#define RBmask2 0x0
#define RBmask3 0x0
*/
PHY_VARS_eNB *PHY_vars_eNB;
PHY_VARS_UE **PHY_vars_UE; // this variable is modified to enable multiple relay nodes (# Relay Node = "num_relay");
void handler(int sig){
void *array[10];
size_t size;
/* get void*'s for all entries on the stack */
size = backtrace(array, 10);
/* print out all the frames to stderr*/
fprintf(stderr, "Error: signal %d:\n", sig);
backtrace_symbols_fd(array, size, 2);
exit(1);
}
#ifdef XFORMS
void do_forms(FD_lte_scope *form, LTE_DL_FRAME_PARMS *frame_parms, short **channel, short **channel_f, short **rx_sig, short **rx_sig_f, short *dlsch_comp, short* dlsch_comp_i, short* dlsch_rho, short *dlsch_llr, int coded_bits_per_codeword){
int i, j, ind, k, s;
float Re, Im;
float mag_sig[NB_ANTENNAS_RX*4*NUMBER_OF_OFDM_CARRIERS*NUMBER_OF_OFDM_SYMBOLS_PER_SLOT];
float sig_time[NB_ANTENNAS_RX*4*NUMBER_OF_OFDM_CARRIERS*NUMBER_OF_OFDM_SYMBOLS_PER_SLOT];
float sig2[FRAME_LENGTH_COMPLEX_SAMPLES], time2[FRAME_LENGTH_COMPLEX_SAMPLES], I[25*12*11*4], Q[25*12*11*4], *llr, *llr_time;
float avg, cum_avg;
llr = malloc(coded_bits_per_codeword*sizeof(float));
llr_time = malloc(coded_bits_per_codeword*sizeof(float));
// Channel frequency response
cum_avg = 0;
ind = 0;
for (j=0; j<4; j++) {
for (i=0; i<frame_parms->nb_antennas_rx; i++) {
for (k=0; k<NUMBER_OF_OFDM_CARRIERS*7; k++){
sig_time[ind] = (float)ind;
Re = (float)(channel_f[(j<<1)+i][2*k]);
Im = (float)(channel_f[(j<<1)+i][2*k+1]);
//mag_sig[ind] = (short) rand();
mag_sig[ind] = (short)10*log10(1.0+((double)Re*Re + (double)Im*Im));
cum_avg += (short)sqrt((double)Re*Re + (double)Im*Im) ;
ind++;
}
// ind += NUMBER_OF_OFDM_CARRIERS/4; // spacing for visualization
}
}
avg = cum_avg/NUMBER_OF_USEFUL_CARRIERS;
//fl_set_xyplot_ybounds(form->channel_f,30,70);
fl_set_xyplot_data(form->channel_f,sig_time,mag_sig,ind,"","","");
/*
// channel time resonse
cum_avg = 0;
ind = 0;
for (k=0; k<1; k++){
for (j=0; j<1; j++) {
for (i=0; i<frame_parms->ofdm_symbol_size; i++){
sig_time[ind] = (float)ind;
Re = (float)(channel[k+2*j][2*i]);
Im = (float)(channel[k+2*j][2*i+1]);
//mag_sig[ind] = (short) rand();
mag_sig[ind] = (short)10*log10(1.0+((double)Re*Re + (double)Im*Im));
cum_avg += (short)sqrt((double)Re*Re + (double)Im*Im) ;
ind++;
}
}
}
//fl_set_xyplot_ybounds(form->channel_t_im,10,90);
fl_set_xyplot_data(form->channel_t_im,sig_time,mag_sig,ind,"","","");
*/
// channel_t_re = rx_sig_f[0]
//for (i=0; i<FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX; i++) {
for (i=0; i<NUMBER_OF_OFDM_CARRIERS*frame_parms->symbols_per_tti/2; i++) {
sig2[i] = 10*log10(1.0+(double) ((rx_sig_f[0][4*i])*(rx_sig_f[0][4*i])+(rx_sig_f[0][4*i+1])*(rx_sig_f[0][4*i+1])));
time2[i] = (float) i;
}
//fl_set_xyplot_ybounds(form->channel_t_re,10,90);
fl_set_xyplot_data(form->channel_t_re,time2,sig2,NUMBER_OF_OFDM_CARRIERS*frame_parms->symbols_per_tti,"","","");
//fl_set_xyplot_data(form->channel_t_re,time2,sig2,FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,"","","");
// channel_t_im = rx_sig[0]
//if (frame_parms->nb_antennas_rx>1) {
for (i=0; i<FRAME_LENGTH_COMPLEX_SAMPLES; i++) {
//for (i=0; i<NUMBER_OF_OFDM_CARRIERS*frame_parms->symbols_per_tti/2; i++) {
sig2[i] = 10*log10(1.0+(double) ((rx_sig[0][2*i])*(rx_sig[0][2*i])+(rx_sig[0][2*i+1])*(rx_sig[0][2*i+1])));
time2[i] = (float) i;
}
//fl_set_xyplot_ybounds(form->channel_t_im,0,100);
//fl_set_xyplot_data(form->channel_t_im,&time2[640*12*6],&sig2[640*12*6],640*12,"","","");
fl_set_xyplot_data(form->channel_t_im,time2,sig2,FRAME_LENGTH_COMPLEX_SAMPLES,"","","");
//}
/*
// PBCH LLR
j=0;
for(i=0;i<1920;i++) {
llr[j] = (float) pbch_llr[i];
llr_time[j] = (float) j;
//if (i==63)
// i=127;
//else if (i==191)
// i=319;
j++;
}
fl_set_xyplot_data(form->decoder_input,llr_time,llr,1920,"","","");
//fl_set_xyplot_ybounds(form->decoder_input,-100,100);
// PBCH I/Q
j=0;
for(i=0;i<12*12;i++) {
I[j] = pbch_comp[2*i];
Q[j] = pbch_comp[2*i+1];
j++;
//if (i==47)
// i=96;
//else if (i==191)
// i=239;
}
fl_set_xyplot_data(form->scatter_plot,I,Q,12*12,"","","");
//fl_set_xyplot_xbounds(form->scatter_plot,-100,100);
//fl_set_xyplot_ybounds(form->scatter_plot,-100,100);
// PDCCH I/Q
j=0;
for(i=0;i<12*25*3;i++) {
I[j] = pdcch_comp[2*i];
Q[j] = pdcch_comp[2*i+1];
j++;
//if (i==47)
// i=96;
//else if (i==191)
// i=239;
}
fl_set_xyplot_data(form->scatter_plot1,I,Q,12*25*3,"","","");
//fl_set_xyplot_xbounds(form->scatter_plot,-100,100);
//fl_set_xyplot_ybounds(form->scatter_plot,-100,100);
*/
// DLSCH LLR
for(i=0; i<coded_bits_per_codeword; i++) {
llr[i] = (float) dlsch_llr[i];
llr_time[i] = (float) i;
}
fl_set_xyplot_data(form->demod_out, llr_time, llr, coded_bits_per_codeword, "", "", "");
fl_set_xyplot_ybounds(form->demod_out, -1000, 1000);
// DLSCH I/Q
j=0;
for (s=0; s<frame_parms->symbols_per_tti; s++) {
for(i=0; i<12*25; i++) {
I[j] = dlsch_comp[(2*25*12*s)+2*i];
Q[j] = dlsch_comp[(2*25*12*s)+2*i+1];
j++;
}
//if (s==2)
// s=3;
//else if (s==5)
// s=6;
//else if (s==8)
// s=9;
}
fl_set_xyplot_data(form->scatter_plot, I, Q, j, "", "", "");
fl_set_xyplot_xbounds(form->scatter_plot, -2000, 2000);
fl_set_xyplot_ybounds(form->scatter_plot, -2000, 2000);
// DLSCH I/Q
j=0;
for (s=0; s<frame_parms->symbols_per_tti; s++) {
for(i=0; i<12*25; i++) {
I[j] = dlsch_comp_i[(2*25*12*s)+2*i];
Q[j] = dlsch_comp_i[(2*25*12*s)+2*i+1];
j++;
}
//if (s==2)
// s=3;
//else if (s==5)
// s=6;
//else if (s==8)
// s=9;
}
fl_set_xyplot_data(form->scatter_plot1, I, Q, j, "", "", "");
fl_set_xyplot_xbounds(form->scatter_plot1, -2000, 2000);
fl_set_xyplot_ybounds(form->scatter_plot1, -2000, 2000);
// DLSCH I/Q
j=0;
for (s=0;s<frame_parms->symbols_per_tti;s++) {
for(i=0;i<12*25;i++) {
I[j] = dlsch_rho[(2*25*12*s)+2*i];
Q[j] = dlsch_rho[(2*25*12*s)+2*i+1];
j++;
}
//if (s==2)
// s=3;
//else if (s==5)
// s=6;
//else if (s==8)
// s=9;
}
fl_set_xyplot_data(form->scatter_plot2, I, Q, j, "", "", "");
//fl_set_xyplot_xbounds(form->scatter_plot2,-1000,1000);
//fl_set_xyplot_ybounds(form->scatter_plot2,-1000,1000);
free(llr);
free(llr_time);
}
#endif
// In the following function the first parameter ("unsigned char num_relay") is added for # RN in the Parallel Relay Network (PRN);
void lte_param_init(unsigned char num_relay, unsigned char N_tx, unsigned char N_rx, unsigned char transmission_mode, uint8_t extended_prefix_flag, uint16_t Nid_cell, uint8_t tdd_config, uint8_t N_RB_DL, uint8_t osf) {
LTE_DL_FRAME_PARMS *lte_frame_parms;
int i;
unsigned int j;
printf("Start lte_param_init\n");
PHY_vars_eNB = (PHY_VARS_eNB *)malloc(sizeof(PHY_VARS_eNB));
//PHY_vars_UE = malloc(sizeof(PHY_VARS_UE));
PHY_vars_UE = (PHY_VARS_UE **)malloc(num_relay * sizeof(PHY_VARS_UE *));
if (!(PHY_vars_eNB && PHY_vars_UE)){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
for(j=0; j<num_relay; j++){
PHY_vars_UE[j] = (PHY_VARS_UE *)malloc(sizeof(PHY_VARS_UE));
if (!(PHY_vars_UE[j])){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
}
//PHY_config = (PHY_CONFIG *)malloc(sizeof(PHY_CONFIG));
mac_xface = (MAC_xface *)malloc(sizeof(MAC_xface));
if (mac_xface == NULL){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
randominit(0);
set_taus_seed(0);
lte_frame_parms = &(PHY_vars_eNB->lte_frame_parms);
lte_frame_parms->N_RB_DL = N_RB_DL; //50 for 10MHz and 25 for 5 MHz
lte_frame_parms->N_RB_UL = N_RB_DL;
lte_frame_parms->Ncp = extended_prefix_flag;
lte_frame_parms->Nid_cell = Nid_cell;
lte_frame_parms->nushift = 0;
lte_frame_parms->nb_antennas_tx = N_tx;
lte_frame_parms->nb_antennas_rx = N_rx;
lte_frame_parms->phich_config_common.phich_resource = oneSixth;
lte_frame_parms->tdd_config = tdd_config;
lte_frame_parms->frame_type = 1;
// lte_frame_parms->Csrs = 2;
// lte_frame_parms->Bsrs = 0;
// lte_frame_parms->kTC = 0;44
// lte_frame_parms->n_RRC = 0;
lte_frame_parms->mode1_flag = (transmission_mode == 1) ? 1 : 0;
init_frame_parms(lte_frame_parms,osf);
//copy_lte_parms_to_phy_framing(lte_frame_parms, &(PHY_config->PHY_framing));
phy_init_top(lte_frame_parms); //allocation
lte_frame_parms->twiddle_fft = twiddle_fft;
lte_frame_parms->twiddle_ifft = twiddle_ifft;
lte_frame_parms->rev = rev;
for(j=0; j<num_relay; j++){
PHY_vars_UE[j]->is_secondary_ue = 0;
PHY_vars_UE[j]->lte_frame_parms = *lte_frame_parms;
}
//PHY_vars_UE->is_secondary_ue = 0;
//PHY_vars_UE->lte_frame_parms = *lte_frame_parms;
PHY_vars_eNB->lte_frame_parms = *lte_frame_parms;
phy_init_lte_top(lte_frame_parms);
dump_frame_parms(lte_frame_parms);
for (i=0; i<3; i++)
for(j=0; j<num_relay; j++){
lte_gold(lte_frame_parms, PHY_vars_UE[j]->lte_gold_table[i], i);
}
for(j=0; j<num_relay; j++){
phy_init_lte_ue(&PHY_vars_UE[j]->lte_frame_parms,
&PHY_vars_UE[j]->lte_ue_common_vars,
PHY_vars_UE[j]->lte_ue_dlsch_vars,
PHY_vars_UE[j]->lte_ue_dlsch_vars_SI,
PHY_vars_UE[j]->lte_ue_dlsch_vars_ra,
PHY_vars_UE[j]->lte_ue_pbch_vars,
PHY_vars_UE[j]->lte_ue_pdcch_vars,
PHY_vars_UE[j],
0);
}
phy_init_lte_eNB(&PHY_vars_eNB->lte_frame_parms,
&PHY_vars_eNB->lte_eNB_common_vars,
PHY_vars_eNB->lte_eNB_ulsch_vars,
0,
PHY_vars_eNB,
1,
0);
printf("Done lte_param_init\n");
}
//DCI2_5MHz_2A_M10PRB_TDD_t DLSCH_alloc_pdu2_2A[2];
DCI2_5MHz_2D_M10PRB_TDD_t DLSCH_alloc_pdu2_2D[2];
#define UL_RB_ALLOC 0x1ff;
#define CCCH_RB_ALLOC computeRIV(PHY_vars_eNB->lte_frame_parms.N_RB_UL, 0, 2)
//#define DLSCH_RB_ALLOC 0x1fbf // igore DC component, RB13
#define DLSCH_RB_ALLOC 0x1fff // all 25 RBs
//#define DLSCH_RB_ALLOC 0x0001
int main(int argc, char **argv) {
char c;
int k, i, j, aa, aarx;
int s, Kr, Kr_bytes;
double sigma2, sigma2_dB = 10, SNR, snr0 = -2.0, snr1, rate;
double snr_step = 1, snr_int = 20;
//int **txdataF, **txdata;
int **txdata;
#ifdef IFFT_FPGA
int **txdataF2;
int ind;
#endif
LTE_DL_FRAME_PARMS *frame_parms;
double **s_re, **s_im;
double ***r_re, ***r_im; // 3-D received signal matrices in the form of r_re[# of RN][][], r_im[# of RN][][];
double forgetting_factor = 0.0; // in [0,1] 0 means a new channel every time, 1 means keep the same channel
double hold_channel = 0; // use hold_channel=1 instead of forgetting_factor=1 (more efficient)
double iqim = 0.0;
uint8_t extended_prefix_flag=0, transmission_mode=1, n_tx=1, n_rx=1;
uint16_t Nid_cell=0;
int eNB_id = 0, eNB_id_i = NUMBER_OF_eNB_MAX;
unsigned char mcs, dual_stream_UE = 0;
unsigned char awgn_flag = 0, round, dci_flag = 0;
unsigned char i_mod = 2;
unsigned short NB_RB = conv_nprb(0, DLSCH_RB_ALLOC);
unsigned char Ns, l, m;
uint16_t tdd_config = 3;
uint16_t n_rnti = 0x1234;
int n_users = 1; // if we select 'n_users = # of RN', would it be possible to simulate PRN setup?
unsigned int num_relay;
SCM_t channel_model = Rayleigh1_corr;
// unsigned char *input_data, *decoded_output;
unsigned char *input_buffer[2];
unsigned short input_buffer_length;
unsigned int ret;
unsigned int coded_bits_per_codeword, nsymb, dci_cnt, tbs;
unsigned int tx_lev, tx_lev_dB, trials, error_tot[4]={0}, round_trials[4]={0}, dci_errors=0, dlsch_active=0, num_layers;
int re_allocated;
FILE *bler_fd;
char bler_fname[256];
FILE *tikz_fd;
char tikz_fname[256];
FILE *input_trch_fd;
unsigned char input_trch_file=0;
FILE *input_fd=NULL;
unsigned char input_file=0;
char input_val_str[50], input_val_str2[50];
char input_trch_val[16];
double pilot_sinr, abs_channel;
// unsigned char pbch_pdu[6];
DCI_ALLOC_t dci_alloc[8];
//DCI_ALLOC_t dci_alloc_rx[8];
DCI_ALLOC_t **dci_alloc_rx; // where 1st dimension of "dci_alloc_rx" will hold "# of RNs (UEs)" in the system;
int num_common_dci=0, num_ue_spec_dci=0, num_dci=0;
// FILE *rx_frame_file;
int n_frames;
int n_ch_rlz = 1;
channel_desc_t **eNB2UE; // which is a pointer array whose size will be the "# of RNs (UEs)" in the system;
double snr;
uint8_t num_pdcch_symbols=3, num_pdcch_symbols_2=0;
uint8_t pilot1, pilot2, pilot3;
uint8_t rx_sample_offset = 0;
//char stats_buffer[4096];
//int len;
uint8_t num_rounds=4,fix_rounds=0;
uint8_t subframe=6;
int u;
int abstx=0;
int iii;
FILE *csv_fd;
char csv_fname[20];
int ch_realization;
int pmi_feedback=0;
// void *data;
// int ii;
// int bler;
double blerr, uncoded_ber, avg_ber;
short *uncoded_ber_bit;
uint8_t N_RB_DL = 25, osf = 1;
int16_t amp;
#ifdef XFORMS
FD_lte_scope *form;
char title[255];
#endif
signal(SIGSEGV, handler);
// default parameters
mcs = 0;
n_frames = 1000;
snr0 = 0;
num_layers = 1;
num_relay = 1;
while ((c = getopt(argc, argv, "hadpm:n:o:s:f:t:c:g:r:F:x:y:z:M:N:I:i:R:S:C:T:b:u:J:")) != -1) {
switch (c){
case 'a':
awgn_flag = 1;
break;
case 'b':
tdd_config=atoi(optarg);
break;
case 'd':
dci_flag = 1;
break;
case 'm':
mcs = atoi(optarg);
break;
case 'n':
n_frames = atoi(optarg);
break;
case 'C':
Nid_cell = atoi(optarg);
break;
case 'o':
rx_sample_offset = atoi(optarg);
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);
}
*/
printf("Please use the -G option to select the channel model\n");
exit(-1);
break;
case 'F':
forgetting_factor = atof(optarg);
break;
case 's':
snr0 = atoi(optarg);
break;
case 't':
//Td= atof(optarg);
printf("Please use the -G option to select the channel model\n");
exit(-1);
break;
case 'f':
snr_step= atof(optarg);
break;
case 'M':
abstx= atof(optarg);
break;
case 'N':
n_ch_rlz= atof(optarg);
break;
case 'p':
extended_prefix_flag=1;
break;
case 'c':
num_pdcch_symbols=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;
break;
case 'I':
channel_model=Rayleigh1;
break;
case 'J':
channel_model=Rayleigh1_corr;
break;
case 'K':
channel_model=Rayleigh1_anticorr;
break;
case 'L':
channel_model=Rice8;
break;
case 'M':
channel_model=Rice1;
break;
default:
msg("Unsupported channel model!\n");
exit(-1);
}
break;
case 'x':
transmission_mode = atoi(optarg);
if ((transmission_mode!=1) && (transmission_mode!=2) && (transmission_mode!=5) && (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 'I':
input_trch_fd = fopen(optarg,"r");
input_trch_file=1;
break;
case 'i':
input_fd = fopen(optarg,"r");
input_file = 1;
dci_flag = 1;
break;
case 'R':
num_rounds = atoi(optarg);
fix_rounds = 1;
break;
case 'S':
subframe = atoi(optarg);
break;
case 'T':
n_rnti = atoi(optarg);
break;
case 'u':
dual_stream_UE = atoi(optarg);
if ((n_tx!=2) || (transmission_mode!=5)) {
msg("Unsupported nb of decoded users: %d user(s), %d user(s) to decode\n", n_tx, dual_stream_UE);
exit(-1);
}
break;
case 'J':
num_relay = atoi(optarg);
if ((num_relay < 1) || (num_relay > 8)) {
msg("Unsupported number of Relay Nodes (RNs) in the PRN system %d\n", num_relay);
exit(-1);
}
break;
case 'h':
default:
printf("%s -h(elp) -a(wgn on) -d(ci decoding on) -p(extended prefix on) -m mcs -n n_frames -s snr0 -t Delayspread -x transmission mode (1,2,5,6) -y TXant -z RXant -I trch_file -J num_of_relays \n",argv[0]);
printf("-h This message\n");
printf("-a Use AWGN channel and not multipath\n");
printf("-c Number of PDCCH symbols\n");
printf("-m MCS\n");
printf("-d Transmit the DCI and compute its error statistics and the overall throughput\n");
printf("-p Use extended prefix mode\n");
printf("-n Number of frames to simulate\n");
printf("-o Sample offset for receiver\n");
printf("-s Starting SNR, runs from SNR to SNR+%.1fdB in steps of %.1fdB. If n_frames is 1 then just SNR is simulated and MATLAB/OCTAVE output is generated\n", snr_int, snr_step);
printf("-f step size of SNR, default value is 1.\n");
printf("-t Delay spread for multipath channel\n");
printf("-r Ricean factor (dB, 0 dB = Rayleigh, 100 dB = almost AWGN)\n");
printf("-g [A:M] Use 3GPP 25.814 SCM-A/B/C/D('A','B','C','D') or 36-101 EPA('E'), EVA ('F'),ETU('G') models (ignores delay spread and Ricean factor), Rayghleigh8 ('H'), Rayleigh1('I'), Rayleigh1_corr('J'), Rayleigh1_anticorr ('K'), Rice8('L'), Rice1('M')\n");
printf("-F forgetting factor (0 new channel every trial, 1 channel constant\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("-R Number of HARQ rounds (fixed)\n");
printf("-M Determines whether the Absraction flag is on or Off. 1-->On and 0-->Off. Default status is Off. \n");
printf("-N Determines the number of Channel Realizations in Absraction mode. Default value is 1. \n");
printf("-I Input filename for TrCH data (binary)\n");
printf("-u Determines if the 2 streams at the UE are decoded or not. 0-->U2 is interference only and 1-->U2 is detected\n");
printf("-J Number of Relay Nodes (RNs) in the Parallel Relay Network (PRN)\n"); //= # UEs that are connected to the eNb via limited capacity backhaul;
exit(1);
break;
}
}
#ifdef XFORMS
fl_initialize(&argc, argv, NULL, 0, 0);
form = create_form_lte_scope();
sprintf(title, "LTE DLSIM SCOPE");
fl_show_form(form->lte_scope, FL_PLACE_HOTSPOT, FL_FULLBORDER, title);
#endif
if (transmission_mode==5) {
n_users = 2;
printf("dual_stream_UE=%d\n", dual_stream_UE);
}
lte_param_init(num_relay, n_tx, n_rx, transmission_mode, extended_prefix_flag, Nid_cell, tdd_config, N_RB_DL, osf);
printf("Setting mcs = %d\n", mcs);
printf("NPRB = %d\n", NB_RB);
printf("n_frames = %d\n", n_frames);
printf("Transmission mode %d with %dx%d antenna configuration, Extended Prefix %d\n", transmission_mode, n_tx, n_rx, extended_prefix_flag);
snr1 = snr0+snr_int;
printf("SNR0 %f, SNR1 %f\n",snr0,snr1);
/*
txdataF = (int **)malloc16(2*sizeof(int*));
txdataF[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
txdataF[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
txdata = (int **)malloc16(2*sizeof(int*));
txdata[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
txdata[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
*/
frame_parms = &PHY_vars_eNB->lte_frame_parms;
#ifdef IFFT_FPGA
txdata = (int **)malloc16(2*sizeof(int*));
txdata[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
txdata[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
bzero(txdata[0],FRAME_LENGTH_BYTES);
bzero(txdata[1],FRAME_LENGTH_BYTES);
txdataF2 = (int **)malloc16(2*sizeof(int*));
txdataF2[0] = (int *)malloc16(FRAME_LENGTH_BYTES_NO_PREFIX);
txdataF2[1] = (int *)malloc16(FRAME_LENGTH_BYTES_NO_PREFIX);
bzero(txdataF2[0],FRAME_LENGTH_BYTES_NO_PREFIX);
bzero(txdataF2[1],FRAME_LENGTH_BYTES_NO_PREFIX);
#else
txdata = PHY_vars_eNB->lte_eNB_common_vars.txdata[eNB_id];
#endif
printf("Channel Model=%d\n", channel_model);
printf("SCM-A=%d, SCM-B=%d, SCM-C=%d, SCM-D=%d, EPA=%d, EVA=%d, ETU=%d, Rayleigh8=%d, Rayleigh1=%d, Rayleigh1_corr=%d, Rayleigh1_anticorr=%d, Rice1=%d, Rice8=%d\n", SCM_A, SCM_B, SCM_C, SCM_D, EPA, EVA, ETU, Rayleigh8, Rayleigh1, Rayleigh1_corr, Rayleigh1_anticorr, Rice1, Rice8);
//sprintf(bler_fname,"second_bler_tx%d_mcs%d_chan%d.csv", transmission_mode, mcs, channel_model);
//bler_fd = fopen(bler_fname,"w");
sprintf(bler_fname,"bler_relay_DF_mcs%d_%d-QAM_RN%d.m", mcs, (short)pow(2, get_Qm(mcs)), num_relay);
bler_fd = fopen(bler_fname, "w");
fprintf(bler_fd,"SNR; MCS; NB_OF_RELAYS; TBS; Effective_rate; Coding_Rate; err0; trials0; err1; trials1; err2; trials2; err3; trials3; dci_err; BER;\n");
if(abstx){
// CSV file
sprintf(csv_fname,"data_out%d.m", mcs);
csv_fd = fopen(csv_fname,"w");
fprintf(csv_fd,"data_all%d=[", mcs);
}
//sprintf(tikz_fname, "second_bler_tx%d_u2=%d_mcs%d_chan%d_nsimus%d.tex",transmission_mode,dual_stream_UE,mcs,channel_model,n_frames);
sprintf(tikz_fname, "second_bler_tx%d_u2=%d_mcs%d_chan%d_nsimus%d",transmission_mode,dual_stream_UE,mcs,channel_model,n_frames);
tikz_fd = fopen(tikz_fname,"w");
//fprintf(tikz_fd,"\\addplot[color=red, mark=o] plot coordinates {");
switch (mcs){
case 0:
fprintf(tikz_fd,"\\addplot[color=blue, mark=star] plot coordinates {");
break;
case 1:
fprintf(tikz_fd,"\\addplot[color=red, mark=star] plot coordinates {");
break;
case 2:
fprintf(tikz_fd,"\\addplot[color=green, mark=star] plot coordinates {");
break;
case 3:
fprintf(tikz_fd,"\\addplot[color=yellow, mark=star] plot coordinates {");
break;
case 4:
fprintf(tikz_fd,"\\addplot[color=black, mark=star] plot coordinates {");
break;
case 5:
fprintf(tikz_fd,"\\addplot[color=blue, mark=o] plot coordinates {");
break;
case 6:
fprintf(tikz_fd,"\\addplot[color=red, mark=o] plot coordinates {");
break;
case 7:
fprintf(tikz_fd,"\\addplot[color=green, mark=o] plot coordinates {");
break;
case 8:
fprintf(tikz_fd,"\\addplot[color=yellow, mark=o] plot coordinates {");
break;
case 9:
fprintf(tikz_fd,"\\addplot[color=black, mark=o] plot coordinates {");
break;
}
// Allocating memory and test the dynamic allocations;
s_re = (double **)malloc(2*sizeof(double *));
s_im = (double **)malloc(2*sizeof(double *));
r_re = (double ***)malloc(num_relay*sizeof(double **));
r_im = (double ***)malloc(num_relay*sizeof(double **));
dci_alloc_rx = (DCI_ALLOC_t **)malloc(num_relay*sizeof(DCI_ALLOC_t *));
if (!(s_re && s_im && r_re && r_im && dci_alloc_rx)){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
for (i=0; i<2; i++) {
s_re[i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_im[i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
if (!(s_re[i] && s_im[i])){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
}
for(j=0; j<num_relay; j++){
r_re[j] = (double **)malloc(2*sizeof(double*));
r_im[j] = (double **)malloc(2*sizeof(double*));
dci_alloc_rx[j] = (DCI_ALLOC_t *)malloc(8*sizeof(DCI_ALLOC_t));
if (!(r_re[j] && r_im[j] && dci_alloc_rx[j])){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
for(i=0; i<2; i++){
r_re[j][i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_im[j][i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
if (!(r_re[j][i] && r_im[j][i])){
printf("Cannot allocate memory!\n");
exit(EXIT_FAILURE);
}
}
}
for(j=0; j<num_relay; j++){
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->crnti = n_rnti;
}
nsymb = (PHY_vars_eNB->lte_frame_parms.Ncp == 0) ? 14 : 12;
// Fill in UL_alloc
UL_alloc_pdu.type = 0;
UL_alloc_pdu.hopping = 0;
UL_alloc_pdu.rballoc = UL_RB_ALLOC;
UL_alloc_pdu.mcs = 1;
UL_alloc_pdu.ndi = 1;
UL_alloc_pdu.TPC = 0;
UL_alloc_pdu.cqi_req = 1;
CCCH_alloc_pdu.type = 0;
CCCH_alloc_pdu.vrb_type = 0;
CCCH_alloc_pdu.rballoc = CCCH_RB_ALLOC;
CCCH_alloc_pdu.ndi = 1;
CCCH_alloc_pdu.mcs = 1;
CCCH_alloc_pdu.harq_pid = 0;
DLSCH_alloc_pdu2_2D[0].rah = 0;
DLSCH_alloc_pdu2_2D[0].rballoc = DLSCH_RB_ALLOC;
DLSCH_alloc_pdu2_2D[0].TPC = 0;
DLSCH_alloc_pdu2_2D[0].dai = 0;
DLSCH_alloc_pdu2_2D[0].harq_pid = 0;
DLSCH_alloc_pdu2_2D[0].tb_swap = 0;
DLSCH_alloc_pdu2_2D[0].mcs1 = mcs;
DLSCH_alloc_pdu2_2D[0].ndi1 = 1;
DLSCH_alloc_pdu2_2D[0].rv1 = 0;
// Forget second codeword
DLSCH_alloc_pdu2_2D[0].tpmi = (transmission_mode>=5 ? 5 : 0); // precoding
DLSCH_alloc_pdu2_2D[0].dl_power_off = (transmission_mode==5 ? 0 : 1);
DLSCH_alloc_pdu2_2D[1].rah = 0;
DLSCH_alloc_pdu2_2D[1].rballoc = DLSCH_RB_ALLOC;
DLSCH_alloc_pdu2_2D[1].TPC = 0;
DLSCH_alloc_pdu2_2D[1].dai = 0;
DLSCH_alloc_pdu2_2D[1].harq_pid = 0;
DLSCH_alloc_pdu2_2D[1].tb_swap = 0;
DLSCH_alloc_pdu2_2D[1].mcs1 = mcs;
DLSCH_alloc_pdu2_2D[1].ndi1 = 1;
DLSCH_alloc_pdu2_2D[1].rv1 = 0;
// Forget second codeword
DLSCH_alloc_pdu2_2D[1].tpmi = (transmission_mode>=5 ? 5 : 0) ; // precoding
DLSCH_alloc_pdu2_2D[1].dl_power_off = (transmission_mode==5 ? 0 : 1);
// Create transport channel structures for SI pdus
PHY_vars_eNB->dlsch_eNB_SI = new_eNB_dlsch(1,1,0);
PHY_vars_eNB->dlsch_eNB_SI->rnti = SI_RNTI;
//PHY_vars_UE->dlsch_ue_SI[0] = new_ue_dlsch(1,1,0);
//PHY_vars_UE->dlsch_ue_SI[0]->rnti = SI_RNTI;
for(j=0; j<num_relay; j++){
PHY_vars_UE[j]->dlsch_ue_SI[0] = new_ue_dlsch(1,1,0);
PHY_vars_UE[j]->dlsch_ue_SI[0]->rnti = SI_RNTI;
}
// Create random Channels coefficients;
eNB2UE = (channel_desc_t **)malloc(num_relay*sizeof(channel_desc_t *));
if (!(eNB2UE)){
printf("Cannot allocate memory for Channel Descriptors!\n");
exit(EXIT_FAILURE);
}
for(j=0; j<num_relay; j++){
eNB2UE[j] = new_channel_desc_scm(PHY_vars_eNB->lte_frame_parms.nb_antennas_tx,
PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx,
channel_model,
BW,
forgetting_factor,
rx_sample_offset,
0);
if (eNB2UE[j] == NULL) {
msg("Problem generating channel model. Exiting.\n");
exit(-1);
}
// if (hold_channel==1)
random_channel(eNB2UE[j]);
}
for (k=0; k<n_users; k++) {
// Create transport channel structures for 2 transport blocks (MIMO)
for (i=0; i<2; i++) {
PHY_vars_eNB->dlsch_eNB[k][i] = new_eNB_dlsch(1,8,0);
if (!PHY_vars_eNB->dlsch_eNB[k][i]) {
printf("Can't get eNB dlsch structures\n");
exit(-1);
}
PHY_vars_eNB->dlsch_eNB[k][i]->rnti = n_rnti+k;
}
}
for(j=0; j<num_relay; j++){
for (i=0; i<2; i++) {
PHY_vars_UE[j]->dlsch_ue[0][i] = new_ue_dlsch(1,8,0);
if (!PHY_vars_UE[j]->dlsch_ue[0][i]) {
printf("Can't get ue dlsch structures\n");
exit(-1);
}
PHY_vars_UE[j]->dlsch_ue[0][i]->rnti = n_rnti;
}
}
if (DLSCH_alloc_pdu2_2D[0].tpmi == 5) {
PHY_vars_eNB->eNB_UE_stats[0].DL_pmi_single = (unsigned short)(taus()&0xffff);
if (n_users > 1)
PHY_vars_eNB->eNB_UE_stats[1].DL_pmi_single = (PHY_vars_eNB->eNB_UE_stats[0].DL_pmi_single ^ 0x1555); //opposite PMI
}
else {
PHY_vars_eNB->eNB_UE_stats[0].DL_pmi_single = 0;
if (n_users > 1)
PHY_vars_eNB->eNB_UE_stats[1].DL_pmi_single = 0;
}
if (input_fd==NULL) {
for(k=0; k<n_users; k++) {
printf("Generating dlsch params for user %d\n",k);
generate_eNB_dlsch_params_from_dci(0,
&DLSCH_alloc_pdu2_2D[k],
n_rnti+k,
format2_2D_M10PRB,
PHY_vars_eNB->dlsch_eNB[k],
&PHY_vars_eNB->lte_frame_parms,
SI_RNTI,
RA_RNTI,
P_RNTI,
PHY_vars_eNB->eNB_UE_stats[k].DL_pmi_single);
}
num_dci = 0;
num_ue_spec_dci = 0;
num_common_dci = 0;
/*
// common DCI
memcpy(&dci_alloc[num_dci].dci_pdu[0],&CCCH_alloc_pdu,sizeof(DCI1A_5MHz_TDD_1_6_t));
dci_alloc[num_dci].dci_length = sizeof_DCI1A_5MHz_TDD_1_6_t;
dci_alloc[num_dci].L = 2;
dci_alloc[num_dci].rnti = SI_RNTI;
num_dci++;
num_common_dci++;
*/
// UE specific DCI
for(k=0; k<n_users; k++) {
memcpy(&dci_alloc[num_dci].dci_pdu[0], &DLSCH_alloc_pdu2_2D[k], sizeof(DCI2_5MHz_2D_M10PRB_TDD_t));
dci_alloc[num_dci].dci_length = sizeof_DCI2_5MHz_2D_M10PRB_TDD_t;
dci_alloc[num_dci].L = 2;
dci_alloc[num_dci].rnti = n_rnti+k;
dci_alloc[num_dci].format = format2_2D_M10PRB;
dump_dci(&PHY_vars_eNB->lte_frame_parms, &dci_alloc[num_dci]);
num_dci++;
num_ue_spec_dci++;
/*
memcpy(&dci_alloc[1].dci_pdu[0], &UL_alloc_pdu, sizeof(DCI0_5MHz_TDD0_t));
dci_alloc[1].dci_length = sizeof_DCI0_5MHz_TDD_0_t;
dci_alloc[1].L = 2;
dci_alloc[1].rnti = n_rnti;
*/
}
for (k=0; k<n_users; k++) {
input_buffer_length = PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->TBS/8;
input_buffer[k] = (unsigned char *)malloc(input_buffer_length+4);
memset(input_buffer[k], 0, input_buffer_length+4);
if (input_trch_file==0) {
for (i=0; i<input_buffer_length; i++) {
input_buffer[k][i]= (unsigned char)(taus()&0xff);
}
}
else {
i=0;
while ((!feof(input_trch_fd)) && (i<input_buffer_length<<3)) {
fscanf(input_trch_fd,"%s",input_trch_val);
if (input_trch_val[0] == '1')
input_buffer[k][i>>3] += (1<<(7-(i&7)));
if (i<16)
printf("input_trch_val %d : %c\n", i, input_trch_val[0]);
i++;
if (((i%8) == 0) && (i<17))
printf("%x\n", input_buffer[k][(i-1)>>3]);
}
printf("Read in %d bits\n", i);
}
}
}
for (ch_realization=0; ch_realization<n_ch_rlz; ch_realization++){
if(abstx){
printf("**********************Channel Realization Index = %d **************************\n", ch_realization);
}
for (SNR=snr0; SNR<snr1; SNR+=snr_step){
error_tot[0]=0;
error_tot[1]=0;
error_tot[2]=0;
error_tot[3]=0;
round_trials[0] = 0;
round_trials[1] = 0;
round_trials[2] = 0;
round_trials[3] = 0;
dci_errors=0;
avg_ber = 0;
round=0;
for (trials=0; trials < n_frames; trials++) {
// printf("Trial %d\n",trials);
fflush(stdout);
round=0;
//if (trials%100==0)
for(j=0; j<num_relay; j++){
eNB2UE[j]->first_run = 1;
}
while (round < num_rounds) {
round_trials[round]++;
if(transmission_mode>=5)
pmi_feedback=1;
else
pmi_feedback=0;
PMI_FEEDBACK:
// printf("Trial %d : Round %d, pmi_feedback %d \n",trials,round,pmi_feedback);
for (aa=0; aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_tx;aa++) {
#ifdef IFFT_FPGA
memset(&PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][aa][0],0,NUMBER_OF_USEFUL_CARRIERS*NUMBER_OF_SYMBOLS_PER_FRAME*sizeof(mod_sym_t));
#else
memset(&PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][aa][0],0,FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX*sizeof(mod_sym_t));
#endif
}
if (input_fd==NULL) {
if (round == 0) {
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->Ndi = 1;
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->rvidx = round>>1;
DLSCH_alloc_pdu2_2D[0].ndi1 = 1;
DLSCH_alloc_pdu2_2D[0].rv1 = 0;
memcpy(&dci_alloc[0].dci_pdu[0],&DLSCH_alloc_pdu2_2D[0],sizeof(DCI2_5MHz_2D_M10PRB_TDD_t));
}
else {
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->Ndi = 0;
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->rvidx = round>>1;
DLSCH_alloc_pdu2_2D[0].ndi1 = 0;
DLSCH_alloc_pdu2_2D[0].rv1 = round>>1;
memcpy(&dci_alloc[0].dci_pdu[0],&DLSCH_alloc_pdu2_2D[0],sizeof(DCI2_5MHz_2D_M10PRB_TDD_t));
}
num_pdcch_symbols_2 = generate_dci_top(num_ue_spec_dci,
num_common_dci,
dci_alloc,
0,
1024,
&PHY_vars_eNB->lte_frame_parms,
PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id],
subframe);
if (num_pdcch_symbols_2 > num_pdcch_symbols) {
msg("Error: given num_pdcch_symbols not big enough\n");
exit(-1);
}
for (k=0;k<n_users;k++) {
coded_bits_per_codeword = get_G(&PHY_vars_eNB->lte_frame_parms,
PHY_vars_eNB->dlsch_eNB[k][0]->nb_rb,
PHY_vars_eNB->dlsch_eNB[k][0]->rb_alloc,
get_Qm(PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->mcs),
num_pdcch_symbols,
subframe);
#ifdef TBS_FIX
tbs = (double)3*dlsch_tbs25[get_I_TBS(PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->mcs)][PHY_vars_eNB->dlsch_eNB[k][0]->nb_rb-1]/4;
#else
tbs = (double)dlsch_tbs25[get_I_TBS(PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->mcs)][PHY_vars_eNB->dlsch_eNB[k][0]->nb_rb-1];
#endif
rate = (double)tbs/(double)coded_bits_per_codeword;
uncoded_ber_bit = (short*) malloc(2*coded_bits_per_codeword);
if (trials==0 && round==0)
printf("Rate = %f (G %d, TBS %d, mod %d, pdcch_sym %d)\n", rate, coded_bits_per_codeword, tbs, get_Qm(PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->mcs), num_pdcch_symbols);
/*
// generate channel here
random_channel(eNB2UE);
// generate frequency response
freq_channel(eNB2UE,NB_RB);
// generate PMI from channel
*/
/*---------------------------------------------------------------------------------------------------*/
/* For our case our code will not enter here; since we do not assume mode 5 (MU-MIMO) transmisssion */
// use the PMI from previous trial
if (DLSCH_alloc_pdu2_2D[0].tpmi == 5) {
PHY_vars_eNB->dlsch_eNB[0][0]->pmi_alloc = quantize_subband_pmi(&PHY_vars_UE[0]->PHY_measurements,0); // how about this function!!! by default I put '0' as an index (no matter from which relay (or UE in this case) the feedback will come- CHECK THIS);
//PHY_vars_UE->dlsch_ue[0][0]->pmi_alloc = quantize_subband_pmi(&PHY_vars_UE->PHY_measurements,0);
for(j=0; j<num_relay; j++)
PHY_vars_UE[j]->dlsch_ue[0][0]->pmi_alloc = quantize_subband_pmi(&PHY_vars_UE[j]->PHY_measurements,0);
if (n_users>1)
PHY_vars_eNB->dlsch_eNB[1][0]->pmi_alloc = (PHY_vars_eNB->dlsch_eNB[0][0]->pmi_alloc ^ 0x1555);
/*
if ((trials<10) && (round==0)) {
printf("tx PMI UE0 %x (pmi_feedback %d)\n",pmi2hex_2Ar1(PHY_vars_eNB->dlsch_eNB[0][0]->pmi_alloc),pmi_feedback);
if (transmission_mode ==5)
printf("tx PMI UE1 %x\n",pmi2hex_2Ar1(PHY_vars_eNB->dlsch_eNB[1][0]->pmi_alloc));
}
*/
}
if (dlsch_encoding(input_buffer[k], &PHY_vars_eNB->lte_frame_parms, num_pdcch_symbols, PHY_vars_eNB->dlsch_eNB[k][0], subframe) < 0)
exit(-1);
// printf("Did not Crash here 1\n");
PHY_vars_eNB->dlsch_eNB[k][0]->rnti = n_rnti+k;
dlsch_scrambling(&PHY_vars_eNB->lte_frame_parms,
num_pdcch_symbols,
PHY_vars_eNB->dlsch_eNB[k][0],
coded_bits_per_codeword,
0,
subframe<<1);
if (n_frames==1) {
for (s=0;s<PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->C;s++) {
if (s<PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->Cminus)
Kr = PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->Kminus;
else
Kr = PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->Kplus;
Kr_bytes = Kr>>3;
for (i=0;i<Kr_bytes;i++)
printf("%d : (%x)\n",i,PHY_vars_eNB->dlsch_eNB[k][0]->harq_processes[0]->c[s][i]);
}
}
// printf("Did not Crash here 2\n");
if (transmission_mode == 5) {
amp = (int16_t)(((int32_t)1024*ONE_OVER_SQRT2_Q15)>>15);
}
else
amp = 1024;
//if (k==1)
// amp=0;
re_allocated = dlsch_modulation(PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id],
amp,
subframe,
&PHY_vars_eNB->lte_frame_parms,
num_pdcch_symbols,
PHY_vars_eNB->dlsch_eNB[k][0]);
// printf("Did not Crash here 3\n");
if (trials==0 && round==0)
printf("RE count %d\n",re_allocated);
if (num_layers>1)
re_allocated = dlsch_modulation(PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id],
1024,
subframe,
&PHY_vars_eNB->lte_frame_parms,
num_pdcch_symbols,
PHY_vars_eNB->dlsch_eNB[k][1]);
} //n_users
// printf("Did not Crash here 4\n");
generate_pilots(PHY_vars_eNB,
PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id],
1024,
LTE_NUMBER_OF_SUBFRAMES_PER_FRAME);
#ifdef IFFT_FPGA
if (n_frames==1) {
write_output("txsigF0.m","txsF0", PHY_vars_eNB->lte_eNB_common_vars.txdataF[0][0],300*nsymb*10,1,4);
if (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx>1)
write_output("txsigF1.m","txsF1", PHY_vars_eNB->lte_eNB_common_vars.txdataF[0][1],300*nsymb*10,1,4);
}
// do table lookup and write results to txdataF2
for (aa=0;aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_tx;aa++) {
ind = 0;
for (i=0;i<FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX;i++)
if (((i%512)>=1) && ((i%512)<=150))
txdataF2[aa][i] = ((int*)mod_table)[PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][aa][ind++]];
else if ((i%512)>=362)
txdataF2[aa][i] = ((int*)mod_table)[PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][aa][ind++]];
else
txdataF2[aa][i] = 0;
// printf("ind=%d\n",ind);
}
if (n_frames==1) {
write_output("txsigF20.m","txsF20", txdataF2[0], FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,1,1);
if (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx>1)
write_output("txsigF21.m","txsF21", txdataF2[1], FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,1,1);
}
tx_lev = 0;
for (aa=0; aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_tx; aa++) {
if (frame_parms->Ncp == 1)
PHY_ofdm_mod(&txdataF2[aa][subframe*nsymb*PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size], // input
&txdata[aa][subframe*PHY_vars_eNB->lte_frame_parms.samples_per_tti], // output
PHY_vars_eNB->lte_frame_parms.log2_symbol_size, // log2_fft_size
2*nsymb, //NUMBER_OF_SYMBOLS_PER_FRAME, // number of symbols
PHY_vars_eNB->lte_frame_parms.nb_prefix_samples, // number of prefix samples
PHY_vars_eNB->lte_frame_parms.twiddle_ifft, // IFFT twiddle factors
PHY_vars_eNB->lte_frame_parms.rev, // bit-reversal permutation
CYCLIC_PREFIX);
else {
normal_prefix_mod(&txdataF2[aa][subframe*nsymb*PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size],
&txdata[aa][subframe*PHY_vars_eNB->lte_frame_parms.samples_per_tti],
2*nsymb,
frame_parms);
}
tx_lev += signal_energy(&txdata[aa][(PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size+PHY_vars_eNB->lte_frame_parms.nb_prefix_samples0)], OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
}
#else //IFFT_FPGA
if (n_frames==1) {
write_output("txsigF0.m","txsF0", PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][0],FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,1,1);
if (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx>1)
write_output("txsigF1.m","txsF1", PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][1],FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,1,1);
}
tx_lev = 0;
for (aa=0; aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_tx; aa++) {
if (frame_parms->Ncp == 1)
PHY_ofdm_mod(&PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][aa][subframe*nsymb*PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size], // input
&txdata[aa][subframe*PHY_vars_eNB->lte_frame_parms.samples_per_tti], // output
PHY_vars_eNB->lte_frame_parms.log2_symbol_size, // log2_fft_size
2*nsymb, //NUMBER_OF_SYMBOLS_PER_FRAME, // number of symbols
PHY_vars_eNB->lte_frame_parms.nb_prefix_samples, // number of prefix samples
PHY_vars_eNB->lte_frame_parms.twiddle_ifft, // IFFT twiddle factors
PHY_vars_eNB->lte_frame_parms.rev, // bit-reversal permutation
CYCLIC_PREFIX);
else {
normal_prefix_mod(&PHY_vars_eNB->lte_eNB_common_vars.txdataF[eNB_id][aa][subframe*nsymb*PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size],
&txdata[aa][subframe*PHY_vars_eNB->lte_frame_parms.samples_per_tti],
2*nsymb,
frame_parms);
}
tx_lev += signal_energy(&txdata[aa][subframe*PHY_vars_eNB->lte_frame_parms.samples_per_tti],
PHY_vars_eNB->lte_frame_parms.samples_per_tti);
}
#endif //IFFT_FPGA
tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
//printf("tx_lev = %d (%d dB)\n",tx_lev,tx_lev_dB);
if (n_frames==1)
write_output("txsig0.m","txs0", txdata[0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
}
else { // Read signal from file
i=0;
while (!feof(input_fd)) {
fscanf(input_fd,"%s %s",input_val_str,input_val_str2);
if ((i%4)==0) {
((short*)txdata[0])[i/2] = (short)((1<<15)*strtod(input_val_str,NULL));
((short*)txdata[0])[(i/2)+1] = (short)((1<<15)*strtod(input_val_str2,NULL));
if ((i/4)<100)
printf("sample %d => %e + j%e (%d +j%d)\n",i/4,strtod(input_val_str,NULL),strtod(input_val_str2,NULL),((short*)txdata[0])[i/4],((short*)txdata[0])[(i/4)+1]);//1,input_val2,);
}
i++;
if (i>(FRAME_LENGTH_SAMPLES))
break;
}
printf("Read in %d samples\n",i/4);
write_output("txsig0.m","txs0", txdata[0],2*frame_parms->samples_per_tti,1,1);
// write_output("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
tx_lev = signal_energy(&txdata[0][0], OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
}
// printf("Copying tx ..., nsymb %d (n_tx %d), awgn %d\n", nsymb, PHY_vars_eNB->lte_frame_parms.nb_antennas_tx, awgn_flag);
for (i=0; i<2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++) {
for (aa=0; aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_tx; aa++) {
if (awgn_flag == 0) {
s_re[aa][i] = ((double)(((short *)txdata[aa]))[(2*subframe*PHY_vars_UE[0]->lte_frame_parms.samples_per_tti) + (i<<1)]); /* I put '0' by default, but this should be checked!!! */
s_im[aa][i] = ((double)(((short *)txdata[aa]))[(2*subframe*PHY_vars_UE[0]->lte_frame_parms.samples_per_tti) +(i<<1)+1]); /* I put '0' by default, but this should be checked!!! */
}
else {
for (j=0; j<num_relay; j++) {
for (aarx=0;aarx<PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx;aarx++) {
if (aa==0) {
r_re[j][aarx][i] = ((double)(((short *)txdata[aa]))[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti) +(i<<1)]);
r_im[j][aarx][i] = ((double)(((short *)txdata[aa]))[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti) +(i<<1)+1]);
}
else {
r_re[j][aarx][i] += ((double)(((short *)txdata[aa]))[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti) +(i<<1)]); // even samples;
r_im[j][aarx][i] += ((double)(((short *)txdata[aa]))[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti) +(i<<1)+1]); // odd samples;
}
}
}
}
}
}
// n0_pow_dB = tx_lev_dB + 10*log10(512/(NB_RB*12)) + SNR;
// generate new channel if pmi_feedback==0, otherwise hold channel
for (j=0; j<num_relay; j++) {
if(abstx){
if (trials==0 && round==0){
if (awgn_flag == 0) {
if(SNR==snr0){
if(pmi_feedback==0)
multipath_channel(eNB2UE[j],s_re,s_im,r_re[j],r_im[j], 2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,1);
else
multipath_channel(eNB2UE[j],s_re,s_im,r_re[j],r_im[j], 2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0);
}else{
multipath_channel(eNB2UE[j],s_re,s_im,r_re[j],r_im[j], 2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,1);
}
freq_channel(eNB2UE[j], 25,51);
snr=pow(10.0,.1*SNR);
fprintf(csv_fd,"%f,",SNR);
for (u=0;u<50;u++){
abs_channel = (eNB2UE[j]->chF[0][u].x*eNB2UE[j]->chF[0][u].x + eNB2UE[j]->chF[0][u].y*eNB2UE[j]->chF[0][u].y);
if(transmission_mode==5){
fprintf(csv_fd,"%e,",abs_channel);
}
else{
pilot_sinr = 10*log10(snr*abs_channel);
fprintf(csv_fd,"%e,",pilot_sinr);
}
}
}
}
else{
if (awgn_flag == 0) {
multipath_channel(eNB2UE[j],s_re,s_im,r_re[j], r_im[j], 2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,1);
}
}
}
else{ //ABStraction
if (awgn_flag == 0) {
if (pmi_feedback==0)
multipath_channel(eNB2UE[j],s_re,s_im,r_re[j],r_im[j], 2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,1);
else
multipath_channel(eNB2UE[j],s_re,s_im,r_re[j],r_im[j], 2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0);
}
}//ABStraction
}
//(double)tx_lev_dB - (SNR+sigma2_dB));
//printf("tx_lev_dB %d\n",tx_lev_dB);
sigma2_dB = 10*log10((double)tx_lev) +10*log10(PHY_vars_eNB->lte_frame_parms.ofdm_symbol_size/(NB_RB*12)) - SNR;
//AWGN
sigma2 = pow(10,sigma2_dB/10);
// n0_pow_dB = tx_lev_dB + 10*log10(512/(NB_RB*12)) + SNR;
// printf("Sigma2 %f (sigma2_dB %f)\n",sigma2,sigma2_dB);
if (pmi_feedback==0) {
for (i=0; i<2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++) {
for (aa=0;aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_rx;aa++) {
for (j=0; j<num_relay; j++) {
//printf("s_re[0][%d]=> %f , r_re[%d][0][%d]=> %f\n",i,s_re[aa][i],j,i,r_re[j][aa][i]);
((short*) PHY_vars_UE[j]->lte_ue_common_vars.rxdata[aa])[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti)+2*i] =
(short) (r_re[j][aa][i] + sqrt(sigma2/2)*gaussdouble(0.0,1.0));
((short*) PHY_vars_UE[j]->lte_ue_common_vars.rxdata[aa])[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti)+2*i+1] =
(short) (r_im[j][aa][i] + (iqim*r_re[j][aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0));
}
}
}
}
else {
for (i=0; i<2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++) {
for (aa=0;aa<PHY_vars_eNB->lte_frame_parms.nb_antennas_rx;aa++) {
for (j=0; j<num_relay; j++) {
// printf("s_re[0][%d]=> %f , r_re[%d][0][%d]=> %f\n",i,s_re[aa][i],j,i,r_re[j][aa][i]);
((short*) PHY_vars_UE[j]->lte_ue_common_vars.rxdata[aa])[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti)+2*i] = (short) (r_re[j][aa][i]);
((short*) PHY_vars_UE[j]->lte_ue_common_vars.rxdata[aa])[(2*subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti)+2*i+1] = (short) (r_im[j][aa][i]);
}
}
}
}
// lte_sync_time_init(PHY_vars_eNB->lte_frame_parms,lte_ue_common_vars);
// lte_sync_time(lte_ue_common_vars->rxdata, PHY_vars_eNB->lte_frame_parms);
// lte_sync_time_free();
/*
// optional: read rx_frame from file
if ((rx_frame_file = fopen("rx_frame.dat","r")) == NULL){
printf("Cannot open rx_frame.m data file\n");
exit(0);
}
result = fread((void *)PHY_vars->rx_vars[0].RX_DMA_BUFFER,4,FRAME_LENGTH_COMPLEX_SAMPLES,rx_frame_file);
printf("Read %d bytes\n",result);
result = fread((void *)PHY_vars->rx_vars[1].RX_DMA_BUFFER,4,FRAME_LENGTH_COMPLEX_SAMPLES,rx_frame_file);
printf("Read %d bytes\n",result);
fclose(rx_frame_file);
*/
if (n_frames==1) {
for (j=0; j<num_relay; j++) {
printf("RX level at %d-th RN in null symbol %d\n", j,
dB_fixed(signal_energy(&PHY_vars_UE[j]->lte_ue_common_vars.rxdata[0][160+OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES], OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES/2)));
printf("RX level at %d-th RN in data symbol %d\n", j,
dB_fixed(signal_energy(&PHY_vars_UE[j]->lte_ue_common_vars.rxdata[0][160+(2*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES)], OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES/2)));
printf("rx_level at %d-th RN in null symbol %f\n", j,
10*log10(signal_energy_fp(r_re[j],r_im[j],1,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES/2,256+(OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES))));
printf("rx_level at %d-th RN in data symbol %f\n", j,
10*log10(signal_energy_fp(r_re[j],r_im[j],1,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES/2,256+(2*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES))));
}
}
if (PHY_vars_eNB->lte_frame_parms.Ncp == 0) { // normal prefix
pilot1 = 4;
pilot2 = 7;
pilot3 = 11;
}
else { // extended prefix
pilot1 = 3;
pilot2 = 6;
pilot3 = 9;
}
i_mod = get_Qm(mcs);
/* Once, at one of the RN, the DLSCH pkt has been decoded, then we continue with the following trial! */
/* Declare an error iff all RNs fail to decode! */
for (j=0; j<num_relay; j++) { // loop over all RNs;
// Inner receiver scheduling for 3 slots
for (Ns=(2*subframe); Ns<((2*subframe)+3); Ns++) {
for (l=0; l<pilot2; l++) {
if (n_frames==1)
printf("Ns %d, l %d\n",Ns,l);
/*
This function implements the OFDM front end processor (FEP).
parameters:
frame_parms LTE DL Frame Parameters
ue_common_vars LTE UE Common Vars
l symbol within slot (0..6/7)
Ns Slot number (0..19)
sample_offset offset within rxdata (points to beginning of subframe)
no_prefix if 1 prefix is removed by HW
*/
slot_fep(PHY_vars_UE[j], l, Ns%20, 0, 0);
#ifdef PERFECT_CE
if (awgn_flag==0){
// fill in perfect channel estimates
freq_channel(eNB2UE[j],PHY_vars_UE[j]->lte_frame_parms.N_RB_DL,301);
//write_output("channel.m","ch",desc1->ch[0],desc1->channel_length,1,8);
//write_output("channelF.m","chF",desc1->chF[0],nb_samples,1,8);
for(k=0; k<NUMBER_OF_eNB_MAX; k++) {
for(aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++){
for (i=0; i<frame_parms->N_RB_DL*12; i++){
((int16_t *) PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[k][(aa<<1)+aarx])[2*i+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(int16_t)(eNB2UE[j]->chF[aarx+(aa*frame_parms->nb_antennas_rx)][i].x*AMP/2);
((int16_t *) PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[k][(aa<<1)+aarx])[2*i+1+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(int16_t)(eNB2UE[j]->chF[aarx+(aa*frame_parms->nb_antennas_rx)][i].y*AMP/2) ;
}
}
}
}
}
else {
for(aa=0;aa<frame_parms->nb_antennas_tx;aa++) {
for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++){
for (i=0;i<frame_parms->N_RB_DL*12;i++){
((int16_t *) PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[0][(aa<<1)+aarx])[2*i+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=AMP/2;
((int16_t *) PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[0][(aa<<1)+aarx])[2*i+1+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=0/2;
}
}
}
}
#endif
if ((Ns==(2+(2*subframe))) && (l==0)) {
lte_ue_measurements(PHY_vars_UE[j], subframe*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti, 1, 0);
/*
debug_msg("RX RSSI %d dBm, digital (%d, %d) dB, linear (%d, %d), avg rx power %d dB (%d lin), RX gain %d dB\n",
PHY_vars_UE[j]->PHY_measurements.rx_rssi_dBm[0] - ((PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx==2) ? 3 : 0),
PHY_vars_UE[j]->PHY_measurements.wideband_cqi_dB[0][0],
PHY_vars_UE[j]->PHY_measurements.wideband_cqi_dB[0][1],
PHY_vars_UE[j]->PHY_measurements.wideband_cqi[0][0],
PHY_vars_UE[j]->PHY_measurements.wideband_cqi[0][1],
PHY_vars_UE[j]->PHY_measurements.rx_power_avg_dB[0],
PHY_vars_UE[j]->PHY_measurements.rx_power_avg[0],
PHY_vars_UE[j]->rx_total_gain_dB);
debug_msg("N0 %d dBm digital (%d, %d) dB, linear (%d, %d), avg noise power %d dB (%d lin)\n",
PHY_vars_UE[j]->PHY_measurements.n0_power_tot_dBm,
PHY_vars_UE[j]->PHY_measurements.n0_power_dB[0],
PHY_vars_UE[j]->PHY_measurements.n0_power_dB[1],
PHY_vars_UE[j]->PHY_measurements.n0_power[0],
PHY_vars_UE[j]->PHY_measurements.n0_power[1],
PHY_vars_UE[j]->PHY_measurements.n0_power_avg_dB,
PHY_vars_UE[j]->PHY_measurements.n0_power_avg);
debug_msg("Wideband CQI tot %d dB, wideband cqi avg %d dB\n",
PHY_vars_UE[j]->PHY_measurements.wideband_cqi_tot[0],
PHY_vars_UE[j]->PHY_measurements.wideband_cqi_avg[0]);
*/
if (transmission_mode==5 || transmission_mode==6) {
if (pmi_feedback==1) {
pmi_feedback= 0;
// printf("measured PMI %x\n",pmi2hex_2Ar1(quantize_subband_pmi(&PHY_vars_UE[j]->PHY_measurements,0)));
goto PMI_FEEDBACK;
}
}
}
if ((Ns==(2*subframe)) && (l==pilot1)) { // process symbols 0,1,2
if (dci_flag == 1) {
rx_pdcch(&PHY_vars_UE[j]->lte_ue_common_vars,
PHY_vars_UE[j]->lte_ue_pdcch_vars,
&PHY_vars_UE[j]->lte_frame_parms,
subframe,
0,
(PHY_vars_UE[j]->lte_frame_parms.mode1_flag == 1) ? SISO : ALAMOUTI,
0);
// overwrite number of pdcch symbols
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols = num_pdcch_symbols;
dci_cnt = dci_decoding_procedure(PHY_vars_UE[j],
dci_alloc_rx[j],
eNB_id,
subframe,
SI_RNTI,
RA_RNTI);
//printf("dci_cnt %d\n",dci_cnt);
if (dci_cnt==0) {
dlsch_active = 0;
if (round==0) { // if an error in the first DCI, then contunue with the next transmission block !?;
if (j == (num_relay-1)){
dci_errors++;
error_tot[0]++; // errs[0] is replaced by error_tot[0];
round_trials[0]++;
round = 5;
//printf("DCI error trial %d error_tot[0] %d\n",trials,error_tot[0]);
}
//dci_errors++;
//round=5;
//error_tot[0]++;
//round_trials[0]++;
// printf("DCI error trial %d error_tot[0] %d\n",trials, error_tot[0]);
}
// for (i=1;i<=round;i++)
// round_trials[i]--;
// round=5;
}
for (i=0;i<dci_cnt;i++) {
//printf("Generating dlsch parameters for RNTI %x\n",dci_alloc_rx[j][i].rnti);
if ((dci_alloc_rx[j][i].rnti == n_rnti) &&
(generate_ue_dlsch_params_from_dci(0,
dci_alloc_rx[j][i].dci_pdu,
dci_alloc_rx[j][i].rnti,
dci_alloc_rx[j][i].format,
PHY_vars_UE[j]->dlsch_ue[0],
&PHY_vars_UE[j]->lte_frame_parms,
SI_RNTI,
RA_RNTI,
P_RNTI) == 0)) {
//dump_dci(&PHY_vars_UE[j]->lte_frame_parms,&dci_alloc_rx[j][i]);
coded_bits_per_codeword = get_G(&PHY_vars_eNB->lte_frame_parms,
PHY_vars_UE[j]->dlsch_ue[0][0]->nb_rb,
PHY_vars_UE[j]->dlsch_ue[0][0]->rb_alloc,
get_Qm(PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[PHY_vars_UE[j]->dlsch_ue[0][0]->current_harq_pid]->mcs),
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols,
subframe);
/*
rate = (double)dlsch_tbs25[get_I_TBS(PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[PHY_vars_UE[j]->dlsch_ue[0][0]->current_harq_pid]->mcs)][PHY_vars_UE[j]->dlsch_ue[0][0]->nb_rb-1]/(coded_bits_per_codeword);
rate*=get_Qm(PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[PHY_vars_UE[j]->dlsch_ue[0][0]->current_harq_pid]->mcs);
printf("num_pdcch_symbols %d, G %d, TBS %d\n", PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols, coded_bits_per_codeword, PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[PHY_vars_UE[j]->dlsch_ue[0][0]->current_harq_pid]->TBS);
*/
dlsch_active = 1;
}
else {
dlsch_active = 0;
if (round==0) { // if an error in the first DCI, then contunue with the next transmission block !?;
if (j == (num_relay-1)){
dci_errors++;
error_tot[0]++;
round_trials[0]++;
}
if (n_frames==1) {
printf("DCI misdetection trial %d\n",trials);
round=5;
}
}
//for (i=1;i<=round;i++)
// round_trials[i]--;
// round=5;
}
}
} // if dci_flag==1
else { //dci_flag == 0
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->crnti = n_rnti;
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols = num_pdcch_symbols;
generate_ue_dlsch_params_from_dci(0,
&DLSCH_alloc_pdu2_2D[0],
C_RNTI,
format2_2D_M10PRB,
PHY_vars_UE[j]->dlsch_ue[0],
&PHY_vars_UE[j]->lte_frame_parms,
SI_RNTI,
RA_RNTI,
P_RNTI);
dlsch_active = 1;
} // if dci_flag == 1
}
if (dlsch_active == 1) {
if ((Ns==(1+(2*subframe))) && (l==0)) { // process symbols 3,4,5
for (m=PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols; m<pilot2; m++) {
if (rx_dlsch(&PHY_vars_UE[j]->lte_ue_common_vars,
PHY_vars_UE[j]->lte_ue_dlsch_vars,
&PHY_vars_UE[j]->lte_frame_parms,
eNB_id,
eNB_id_i,
PHY_vars_UE[j]->dlsch_ue[0],
subframe,
m,
(m==PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols)?1:0,
dual_stream_UE,
&PHY_vars_UE[j]->PHY_measurements,
i_mod) == -1) {
dlsch_active = 0;
break;
}
}
}
if ((Ns==(1+(2*subframe))) && (l==pilot1)) { // process symbols 6,7,8
/*
if (rx_pbch(lte_ue_common_vars, lte_ue_pbch_vars[0], lte_frame_parms, 0, SISO)) {
msg("pbch decoded sucessfully!\n");
}
else {
msg("pbch not decoded!\n");
}
*/
for (m=pilot2; m<pilot3; m++)
if (rx_dlsch(&PHY_vars_UE[j]->lte_ue_common_vars,
PHY_vars_UE[j]->lte_ue_dlsch_vars,
&PHY_vars_UE[j]->lte_frame_parms,
eNB_id,
eNB_id_i,
PHY_vars_UE[j]->dlsch_ue[0],
subframe,
m,
0,
dual_stream_UE,
&PHY_vars_UE[j]->PHY_measurements,
i_mod) == -1) {
dlsch_active = 0;
break;
}
}
if ((Ns==(2+(2*subframe))) && (l==0)) // process symbols 10,11, do deinterleaving for TTI
for (m=pilot3; m<PHY_vars_UE[j]->lte_frame_parms.symbols_per_tti; m++)
if (rx_dlsch(&PHY_vars_UE[j]->lte_ue_common_vars,
PHY_vars_UE[j]->lte_ue_dlsch_vars,
&PHY_vars_UE[j]->lte_frame_parms,
eNB_id,
eNB_id_i,
PHY_vars_UE[j]->dlsch_ue[0],
subframe,
m,
0,
dual_stream_UE,
&PHY_vars_UE[j]->PHY_measurements,
i_mod) == -1) {
dlsch_active = 0;
break;
}
if ((n_frames==1) && (Ns==(2+(2*subframe))) && (l==0)) {
write_output("ch0.m", "ch0",
eNB2UE[j]->ch[0],
eNB2UE[j]->channel_length, 1, 8);
if (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx > 1)
write_output("ch1.m", "ch1",
eNB2UE[j]->ch[PHY_vars_eNB->lte_frame_parms.nb_antennas_rx],
eNB2UE[j]->channel_length, 1, 8);
//common vars
write_output("rxsig0.m", "rxs0",
&PHY_vars_UE[j]->lte_ue_common_vars.rxdata[0][0],
10*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti, 1, 1);
write_output("rxsigF0.m", "rxsF0",
&PHY_vars_UE[j]->lte_ue_common_vars.rxdataF[0][0],
2*PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb, 2, 1);
if (PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx > 1) {
write_output("rxsig1.m","rxs1",
PHY_vars_UE[j]->lte_ue_common_vars.rxdata[1],
PHY_vars_UE[j]->lte_frame_parms.samples_per_tti, 1, 1);
write_output("rxsigF1.m","rxsF1",
PHY_vars_UE[j]->lte_ue_common_vars.rxdataF[1],
2*PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb, 2, 1);
}
write_output("dlsch00_ch0.m", "dl00_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][0][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
if (PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx > 1)
write_output("dlsch01_ch0.m", "dl01_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][1][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
if (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx > 1)
write_output("dlsch10_ch0.m", "dl10_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][2][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
if ((PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx > 1) && (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx > 1))
write_output("dlsch11_ch0.m","dl11_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][3][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
//dlsch_vars
dump_dlsch2(PHY_vars_UE[j], eNB_id, coded_bits_per_codeword);
dump_dlsch2(PHY_vars_UE[j], eNB_id_i, coded_bits_per_codeword);
write_output("dlsch_e.m", "e",
PHY_vars_eNB->dlsch_eNB[0][0]->e,
coded_bits_per_codeword, 1, 4);
//pdcch_vars
write_output("pdcchF0_ext.m", "pdcchF_ext",
PHY_vars_UE[j]->lte_ue_pdcch_vars[eNB_id]->rxdataF_ext[0],
2*3*PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size, 1, 1);
write_output("pdcch00_ch0_ext.m", "pdcch00_ch0_ext",
PHY_vars_UE[j]->lte_ue_pdcch_vars[eNB_id]->dl_ch_estimates_ext[0],
300*3, 1, 1);
write_output("pdcch_rxF_comp0.m", "pdcch0_rxF_comp0",
PHY_vars_UE[j]->lte_ue_pdcch_vars[eNB_id]->rxdataF_comp[0],
4*300, 1, 1);
write_output("pdcch_rxF_llr.m", "pdcch_llr",
PHY_vars_UE[j]->lte_ue_pdcch_vars[eNB_id]->llr,
2400, 1, 4);
}
} // if "dlsch_active = 1";
} // loop over l;
} // loop over Ns;
// calculate uncoded BLER
uncoded_ber=0;
for (i=0; i<coded_bits_per_codeword; i++)
if (PHY_vars_eNB->dlsch_eNB[0][0]->e[i] != (PHY_vars_UE[j]->lte_ue_dlsch_vars[0]->llr[0][i] < 0)) {
uncoded_ber_bit[i] = 1;
uncoded_ber++;
}
else
uncoded_ber_bit[i] = 0;
uncoded_ber /= coded_bits_per_codeword;
avg_ber += uncoded_ber;
//imran
if(abstx){
if (trials<10 && round==0 && transmission_mode==5){
for (iii=0; iii<NB_RB; iii++){
//fprintf(csv_fd, "%d, %d", (PHY_vars_UE[j]->lte_ue_dlsch_vars[eNB_id]->pmi_ext[iii]),
// (PHY_vars_UE[j]->lte_ue_dlsch_vars[eNB_id_i]->pmi_ext[iii]));
msg(" %x", (PHY_vars_UE[j]->lte_ue_dlsch_vars[eNB_id]->pmi_ext[iii]));
// msg("Opposite Extracted pmi %x\n",(PHY_vars_UE[j]->lte_ue_dlsch_vars[eNB_id_i]->pmi_ext[iii]));
}
}
}
/*
printf("precoded CQI %d dB, opposite precoded CQI %d dB\n",
PHY_vars_UE[j]->PHY_measurements.precoded_cqi_dB[eNB_id][0],
PHY_vars_UE[j]->PHY_measurements.precoded_cqi_dB[eNB_id_i][0]);
*/
PHY_vars_UE[j]->dlsch_ue[0][0]->rnti = n_rnti;
dlsch_unscrambling(&PHY_vars_UE[j]->lte_frame_parms,
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols,
PHY_vars_UE[j]->dlsch_ue[0][0],
coded_bits_per_codeword,
PHY_vars_UE[j]->lte_ue_dlsch_vars[eNB_id]->llr[0],
0,
subframe<<1);
/*
for (i=0; i<coded_bits_per_codeword; i++)
PHY_vars_UE[j]->lte_ue_dlsch_vars[0]->llr[0][i] = (short)quantize(100, PHY_vars_UE[j]->lte_ue_dlsch_vars[0]->llr[0][i], 4);
*/
ret = dlsch_decoding(PHY_vars_UE[j]->lte_ue_dlsch_vars[eNB_id]->llr[0],
&PHY_vars_UE[j]->lte_frame_parms,
PHY_vars_UE[j]->dlsch_ue[0][0],
subframe,
PHY_vars_UE[j]->lte_ue_pdcch_vars[0]->num_pdcch_symbols);
#ifdef XFORMS
do_forms(form,
&PHY_vars_UE[j]->lte_frame_parms,
PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates_time,
PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id],
PHY_vars_UE[j]->lte_ue_common_vars.rxdata,
PHY_vars_UE[j]->lte_ue_common_vars.rxdataF,
PHY_vars_UE[j]->lte_ue_dlsch_vars[0]->rxdataF_comp[0],
PHY_vars_UE[j]->lte_ue_dlsch_vars[3]->rxdataF_comp[0],
PHY_vars_UE[j]->lte_ue_dlsch_vars[0]->dl_ch_rho_ext[0],
PHY_vars_UE[j]->lte_ue_dlsch_vars[0]->llr[0],coded_bits_per_codeword);
//PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->w[0], 3*(tbs+64));
//uncoded_ber_bit, coded_bits_per_codeword);
/*
printf("Hit a key to continue\n");
c = getchar();
*/
#endif
if (ret <= MAX_TURBO_ITERATIONS) {
if (n_frames == 1)
printf("No DLSCH errors found\n");
// exit(-1);
if (fix_rounds == 0){ // # of HARQ rounds; by default it is '4' and 'fix_rounds=0';
round=5; // one of the RNs has successfully decoded the messages;
break; // no need to wait for the other RNs to decode! (For time saving!!)
}
else
round++; // why not as 'round = num_rounds' -> what does it bring if we retransmit a decoded data?!!!;
}
else {
//err_total[round]++;
if (n_frames == 1) {
//if ((n_frames==1) || (SNR>=30)) {
printf("DLSCH errors found, uncoded ber %f\n", uncoded_ber);
for (s=0; s<PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->C; s++) {
if (s < PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->Cminus)
Kr = PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->Kminus;
else
Kr = PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->Kplus;
Kr_bytes = Kr>>3;
printf("Decoded_output (Segment %d):\n", s);
for (i=0; i<Kr_bytes; i++)
printf("%d : %x (%x)\n",
i,
PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->c[s][i],
PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->c[s][i]^PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->c[s][i]);
}
write_output("rxsig0.m","rxs0",
&PHY_vars_UE[j]->lte_ue_common_vars.rxdata[0][0],
10*PHY_vars_UE[j]->lte_frame_parms.samples_per_tti, 1, 1);
write_output("rxsigF0.m","rxsF0",
&PHY_vars_UE[j]->lte_ue_common_vars.rxdataF[0][0],
2*PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb, 2, 1);
if (PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx > 1) {
write_output("rxsig1.m","rxs1",
PHY_vars_UE[j]->lte_ue_common_vars.rxdata[1],
PHY_vars_UE[j]->lte_frame_parms.samples_per_tti, 1, 1);
write_output("rxsigF1.m","rxsF1",
PHY_vars_UE[j]->lte_ue_common_vars.rxdataF[1],
2*PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb, 2, 1);
}
write_output("dlsch00_ch0.m","dl00_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][0][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
if (PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx > 1)
write_output("dlsch01_ch0.m","dl01_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][1][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
if (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx > 1)
write_output("dlsch10_ch0.m","dl10_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][2][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
if ((PHY_vars_UE[j]->lte_frame_parms.nb_antennas_rx > 1) && (PHY_vars_eNB->lte_frame_parms.nb_antennas_tx > 1))
write_output("dlsch11_ch0.m","dl11_ch0",
&(PHY_vars_UE[j]->lte_ue_common_vars.dl_ch_estimates[eNB_id][3][0]),
PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size*nsymb/2, 1, 1);
//dlsch_vars
dump_dlsch2(PHY_vars_UE[j], eNB_id, coded_bits_per_codeword);
write_output("dlsch_e.m","e", PHY_vars_eNB->dlsch_eNB[0][0]->e, coded_bits_per_codeword, 1, 4);
write_output("dlsch_ber_bit.m","ber_bit", uncoded_ber_bit, coded_bits_per_codeword, 1, 0);
write_output("dlsch_eNB_w.m","w", PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->w[0], 3*(tbs+64), 1, 4);
write_output("dlsch_UE_w.m","w", PHY_vars_UE[j]->dlsch_ue[0][0]->harq_processes[0]->w[0], 3*(tbs+64), 1, 0);
exit(-1);
}
if (j == (num_relay-1)){
error_tot[round]++;
// printf("round %d errors %d/%d\n", round, error_tot[round], trials);
round++;
if (n_frames == 1)
printf("DLSCH in error in round %d\n", round);
}
}
} //number of relays
} //round
// printf("\n");
if ((error_tot[0]>=100) && (trials>(n_frames/2)))
break;
//len = chbch_stats_read(stats_buffer,NULL,0,4096);
//printf("%s\n\n",stats_buffer);
} //trials
for (j=0; j<num_relay; j++) {
printf("\n**********************Relay Node %j: SNR = %f dB (tx_lev %f, sigma2_dB %f)**************************\n",
j,
SNR,
(double)tx_lev_dB+10*log10(PHY_vars_UE[j]->lte_frame_parms.ofdm_symbol_size/(NB_RB*12)),
sigma2_dB);
}
printf("Errors (%d/%d %d/%d %d/%d %d/%d), Pe = (%e,%e,%e,%e), dci_errors %d/%d, Pe = %e => effective rate %f (%f), normalized delay %f (%f), uncoded_ber %f\n",
error_tot[0],
round_trials[0],
error_tot[1],
round_trials[1],
error_tot[2],
round_trials[2],
error_tot[3],
round_trials[3],
(double)error_tot[0]/(round_trials[0]),
(double)error_tot[1]/(round_trials[1]),
(double)error_tot[2]/(round_trials[2]),
(double)error_tot[3]/(round_trials[3]),
dci_errors,
round_trials[0],
(double)dci_errors/(round_trials[0]),
rate*((double)(round_trials[0]-dci_errors)/((double)round_trials[0] + round_trials[1] + round_trials[2] + round_trials[3])),
rate,
(1.0*(round_trials[0]-error_tot[0])+2.0*(round_trials[1]-error_tot[1])+3.0*(round_trials[2]-error_tot[2])+4.0*(round_trials[3]-error_tot[3]))/((double)round_trials[0])/(double)PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->TBS,
(1.0*(round_trials[0]-error_tot[0])+2.0*(round_trials[1]-error_tot[1])+3.0*(round_trials[2]-error_tot[2])+4.0*(round_trials[3]-error_tot[3]))/((double)round_trials[0]),
avg_ber/round_trials[0]);
fprintf(bler_fd,"%f \t %d \t %d \t %d \t %f \t %f \t %d \t %d \t %d \t %d \t %d \t %d \t %d \t %d \t %d \t %f;\n",
SNR,
mcs,
num_relay,
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->TBS,
rate*((double)(round_trials[0]-dci_errors)/((double)round_trials[0] + round_trials[1] + round_trials[2] + round_trials[3])), //effective rate
rate,
error_tot[0],
round_trials[0],
error_tot[1],
round_trials[1],
error_tot[2],
round_trials[2],
error_tot[3],
round_trials[3],
dci_errors,
avg_ber/round_trials[0]);
fprintf(tikz_fd,"(%f,%f)", SNR, (float)error_tot[0]/round_trials[0]);
if(abstx){ //ABSTRACTION
blerr= (double)error_tot[0]/(round_trials[0]);
fprintf(csv_fd,"%e;\n", blerr);
} //ABStraction
if (((double)error_tot[0]/(round_trials[0]))<1e-5)
break;
}// SNR
} //ch_realization
fclose(bler_fd);
fprintf(tikz_fd,"};\n");
fclose(tikz_fd);
if (input_trch_file==1)
fclose(input_trch_fd);
if (input_file==1)
fclose(input_fd);
if(abstx){// ABSTRACTION
fprintf(csv_fd,"];");
fclose(csv_fd);
}
printf("Freeing dlsch structures\n");
for (i=0; i<2; i++) {
printf("eNB %d\n", i);
free_eNB_dlsch(PHY_vars_eNB->dlsch_eNB[0][i]);
printf("UE %d\n", i);
for (j=0; j<num_relay; j++) {
free_ue_dlsch(PHY_vars_UE[j]->dlsch_ue[0][i]);
}
}
#ifdef IFFT_FPGA
printf("Freeing transmit signals\n");
free(txdataF2[0]);
free(txdataF2[1]);
free(txdataF2);
free(txdata[0]);
free(txdata[1]);
free(txdata);
#endif
printf("Freeing channel I/O\n");
for (i=0; i<2; i++) {
free(s_re[i]);
free(s_im[i]);
}
for (j=0; j<num_relay; j++) {
for (i=0; i<2; i++) {
free(r_re[j][i]);
free(r_im[j][i]);
}
free(r_re[j]);
free(r_im[j]);
free(eNB2UE[j]);
free(dci_alloc_rx[j]);
}
free(s_re);
free(s_im);
free(r_re);
free(r_im);
free(eNB2UE);
free(dci_alloc_rx);
// lte_sync_time_free();
return(0);
}
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