int main(int argc, char *argv[])
{
int ret,ret2;
unsigned int errors,uerrors,errors2,crc_misses,iterations,trials,trials2,block_length,errors3,trials3;
double SNR,sigma,rate=.5;
unsigned char qbits,mcs;
char done0=0;
char done1=1;
char done2=1;
unsigned int coded_bits;
unsigned char NB_RB=25;
int num_pdcch_symbols = 1;
int subframe = 6;
randominit(0);
logInit();
lte_param_init(1,1,1,0,0,3);
PHY_vars_eNB->dlsch_eNB[0][0] = new_eNB_dlsch(1,8,NB_RB,0);
PHY_vars_UE->dlsch_ue[0][0] = new_ue_dlsch(1,8,4,NB_RB,0);
PHY_vars_eNB->dlsch_eNB[0][1] = new_eNB_dlsch(1,8,NB_RB,0);
PHY_vars_UE->dlsch_ue[0][1] = new_ue_dlsch(1,8,4,NB_RB,0);
if (argc>1)
mcs = atoi(argv[1]);
else
mcs = 0;
printf("NB_RB %d\n",NB_RB);
DLSCH_alloc_pdu.rah = 0;
DLSCH_alloc_pdu.rballoc = DLSCH_RB_ALLOC;
DLSCH_alloc_pdu.TPC = 0;
DLSCH_alloc_pdu.dai = 0;
DLSCH_alloc_pdu.harq_pid = 0;
//DLSCH_alloc_pdu2.tb_swap = 0;
DLSCH_alloc_pdu.mcs = mcs;
DLSCH_alloc_pdu.ndi = 1;
DLSCH_alloc_pdu.rv = 0;
if (argc>2)
qbits = atoi(argv[2]);
else
qbits = 4;
printf("Quantization bits %d\n",qbits);
generate_eNB_dlsch_params_from_dci(subframe,
&DLSCH_alloc_pdu,
0x1234,
format1,
PHY_vars_eNB->dlsch_eNB[0],
&PHY_vars_eNB->lte_frame_parms,
PHY_vars_eNB->pdsch_config_dedicated,
SI_RNTI,
0,
P_RNTI,
0); //change this later
generate_ue_dlsch_params_from_dci(subframe,
&DLSCH_alloc_pdu,
C_RNTI,
format1,
PHY_vars_UE->dlsch_ue[0],
&PHY_vars_UE->lte_frame_parms,
PHY_vars_UE->pdsch_config_dedicated,
SI_RNTI,
0,
P_RNTI);
coded_bits = get_G(&PHY_vars_eNB->lte_frame_parms,
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->nb_rb,
PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->rb_alloc,
get_Qm(mcs),
1,
num_pdcch_symbols,
0,
subframe);
printf("Coded_bits (G) = %d\n",coded_bits);
block_length = dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1]>>3;
printf("Block_length = %d bytes (%d bits, rate %f), mcs %d, I_TBS %d, F %d, NB_RB %d\n",block_length,
dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1],(double)dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1]/coded_bits,
mcs,get_I_TBS(mcs),PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->F,NB_RB);
for (SNR=-5; SNR<15; SNR+=.1) {
sigma = pow(10.0,-.05*SNR);
printf("\n\nSNR %f dB => sigma %f\n",SNR,sigma);
errors=0;
crc_misses=0;
errors2=0;
errors3=0;
iterations=0;
if (done0 == 0) {
ret = test_logmap8(PHY_vars_eNB->dlsch_eNB[0][0],
PHY_vars_UE->dlsch_ue[0][0],
coded_bits,
NB_RB,
sigma, // noise standard deviation
qbits,
block_length, // block length bytes
NTRIALS,
&errors,
&trials,
&uerrors,
&crc_misses,
&iterations,
num_pdcch_symbols,
subframe);
if (ret>=0)
printf("%f,%f,%f,%f\n",SNR,(double)errors/trials,(double)crc_misses/trials,(double)iterations/trials);
if (((double)errors/trials) < 1e-2)
done0=1;
}
if ((done0==1) && (done1==1) && (done2==1)) {
printf("done\n");
break;
}
}
return(0);
}
int main(int argc, char **argv)
{
char c;
int i,l,aa;
double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
int **txdata;
double s_re[2][30720*2],s_im[2][30720*2],r_re[2][30720*2],r_im[2][30720*2];
double iqim=0.0;
// int subframe_offset;
uint8_t subframe=0;
#ifdef XFORMS
FD_lte_phy_scope_ue *form_ue;
char title[255];
#endif
int trial, n_errors_common=0,n_errors_ul=0,n_errors_dl=0,n_errors_cfi=0,n_errors_hi=0;
unsigned char eNb_id = 0;
uint8_t awgn_flag=0;
int n_frames=1;
channel_desc_t *eNB2UE;
uint32_t nsymb,tx_lev,tx_lev_dB=0,num_pdcch_symbols=3;
uint8_t extended_prefix_flag=0,transmission_mode=1,n_tx=1,n_rx=1;
uint16_t Nid_cell=0;
// int8_t interf1=-128,interf2=-128;
uint8_t dci_cnt=0;
LTE_DL_FRAME_PARMS *frame_parms;
uint8_t log2L=2, log2Lcommon=2;
DCI_format_t format_selector[MAX_NUM_DCI];
uint8_t num_dci=0;
uint8_t numCCE,common_active=0,ul_active=0,dl_active=0;
uint32_t n_trials_common=0,n_trials_ul=0,n_trials_dl=0,false_detection_cnt=0;
uint8_t common_rx,ul_rx,dl_rx;
uint8_t tdd_config=3;
FILE *input_fd=NULL;
char input_val_str[50],input_val_str2[50];
uint16_t n_rnti=0x1234;
uint8_t osf=1,N_RB_DL=25;
SCM_t channel_model=Rayleigh1_anticorr;
DCI_ALLOC_t dci_alloc_rx[8];
int ret;
uint8_t harq_pid;
uint8_t phich_ACK;
uint8_t num_phich_interf = 0;
lte_frame_type_t frame_type=TDD;
// int re_offset;
// uint32_t *txptr;
int aarx;
int k;
uint32_t perfect_ce = 0;
int CCE_table[800];
number_of_cards = 1;
cpuf = get_cpu_freq_GHz();
logInit();
while ((c = getopt (argc, argv, "hapFg:R:c:n:s:x:y:z:L:M:N:I:f:i:S:P:Y")) != -1) {
switch (c) {
case 'a':
printf("Running AWGN simulation\n");
awgn_flag = 1;
break;
case 'R':
N_RB_DL = atoi(optarg);
break;
case 'F':
frame_type = FDD;
break;
case 'c':
tdd_config=atoi(optarg);
if (tdd_config>6) {
printf("Illegal tdd_config %d (should be 0-6)\n",tdd_config);
exit(-1);
}
break;
case 'g':
switch((char)*optarg) {
case 'A':
channel_model=SCM_A;
break;
case 'B':
channel_model=SCM_B;
break;
case 'C':
channel_model=SCM_C;
break;
case 'D':
channel_model=SCM_D;
break;
case 'E':
channel_model=EPA;
break;
case 'F':
channel_model=EVA;
break;
case 'G':
channel_model=ETU;
break;
default:
printf("Unsupported channel model!\n");
exit(-1);
}
break;
/*
case 'i':
interf1=atoi(optarg);
break;
case 'j':
interf2=atoi(optarg);
break;
*/
case 'n':
n_frames = atoi(optarg);
break;
case 's':
snr0 = atoi(optarg);
break;
case 'p':
extended_prefix_flag=1;
break;
case 'x':
transmission_mode=atoi(optarg);
if ((transmission_mode!=1) &&
(transmission_mode!=2) &&
(transmission_mode!=6)) {
printf("Unsupported transmission mode %d\n",transmission_mode);
exit(-1);
}
break;
case 'y':
n_tx=atoi(optarg);
if ((n_tx==0) || (n_tx>2)) {
printf("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)) {
printf("Unsupported number of rx antennas %d\n",n_rx);
exit(-1);
}
break;
case 'S':
subframe=atoi(optarg);
break;
case 'L':
log2L=atoi(optarg);
if ((log2L!=0)&&
(log2L!=1)&&
(log2L!=2)&&
(log2L!=3)) {
printf("Unsupported DCI aggregation level %d (should be 0,1,2,3)\n",log2L);
exit(-1);
}
break;
case 'M':
log2Lcommon=atoi(optarg);
if ((log2Lcommon!=2)&&
(log2Lcommon!=3)) {
printf("Unsupported Common DCI aggregation level %d (should be 2 or 3)\n",log2Lcommon);
exit(-1);
}
break;
case 'N':
format_selector[num_dci] = (DCI_format_t) atoi(optarg);
if ((format_selector[num_dci]<format0) || (format_selector[num_dci] > format1A)) {
printf("only formats 0, 1, and 1A supported for the moment\n");
exit(-1);
}
if (format_selector[num_dci]==format0) ul_active=1;
if (format_selector[num_dci]==format1A) common_active=1;
if (format_selector[num_dci]==format1) dl_active=1;
num_dci++;
break;
case 'O':
osf = atoi(optarg);
break;
case 'I':
Nid_cell = atoi(optarg);
break;
case 'f':
input_fd = fopen(optarg,"r");
if (input_fd==NULL) {
printf("Problem with filename %s\n",optarg);
exit(-1);
}
break;
case 'i':
n_rnti=atoi(optarg);
break;
case 'P':
num_phich_interf=atoi(optarg);
break;
case 'Y':
perfect_ce = 1;
break;
case 'h':
printf("%s -h(elp) -a(wgn on) -c tdd_config -n n_frames -r RiceanFactor -s snr0 -t Delayspread -x transmission mode (1,2,6) -y TXant -z RXant -L AggregLevelUEspec -M AggregLevelCommonDCI -N DCIFormat\n\n",
argv[0]);
printf("-h This message\n");
printf("-a Use AWGN channel and not multipath\n");
printf("-c TDD config\n");
printf("-S Subframe number (0..9)\n");
printf("-R N_RB_DL\n");
printf("-F use FDD frame\n");
printf("-p Use extended prefix mode\n");
printf("-n Number of frames to simulate\n");
printf("-r Ricean factor (dB, 0 means Rayleigh, 100 is almost AWGN\n");
printf("-s Starting SNR, runs from SNR to SNR + 5 dB. If n_frames is 1 then just SNR is simulated\n");
printf("-t Delay spread for multipath channel\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("-P Number of interfering PHICH\n");
printf("-L log2 of Aggregation level for UE Specific DCI (0,1,2,3)\n");
printf("-M log2 Aggregation level for Common DCI (4,8)\n");
printf("-N Format for UE Spec DCI (0 - format0,\n");
printf(" 1 - format1,\n");
printf(" 2 - format1A,\n");
printf(" 3 - format1B_2A,\n");
printf(" 4 - format1B_4A,\n");
printf(" 5 - format1C,\n");
printf(" 6 - format1D_2A,\n");
printf(" 7 - format1D_4A,\n");
printf(" 8 - format2A_2A_L10PRB,\n");
printf(" 9 - format2A_2A_M10PRB,\n");
printf(" 10 - format2A_4A_L10PRB,\n");
printf(" 11 - format2A_4A_M10PRB,\n");
printf(" 12 - format2_2A_L10PRB,\n");
printf(" 13 - format2_2A_M10PRB,\n");
printf(" 14 - format2_4A_L10PRB,\n");
printf(" 15 - format2_4A_M10PRB\n");
printf(" 16 - format2_2D_M10PRB\n");
printf(" 17 - format2_2D_L10PRB\n");
printf(" can be called multiple times to add more than one DCI\n");
printf("-O Oversampling factor\n");
printf("-I Cell Id\n");
printf("-F Input sample stream\n");
exit(1);
break;
}
}
if ((transmission_mode>1) && (n_tx==1))
n_tx=2;
lte_param_init(n_tx,
n_tx,
n_rx,
transmission_mode,
extended_prefix_flag,
frame_type,
Nid_cell,
tdd_config,
N_RB_DL,
0,
osf,
perfect_ce);
#ifdef XFORMS
fl_initialize (&argc, argv, NULL, 0, 0);
form_ue = create_lte_phy_scope_ue();
sprintf (title, "LTE PHY SCOPE UE");
fl_show_form (form_ue->lte_phy_scope_ue, FL_PLACE_HOTSPOT, FL_FULLBORDER, title);
#endif
mac_xface->computeRIV = computeRIV;
mac_xface->frame_parms = &eNB->frame_parms;
// init_transport_channels(transmission_mode);
if (n_frames==1)
snr1 = snr0+.1;
else
snr1 = snr0+8.0;
printf("SNR0 %f, SNR1 %f\n",snr0,snr1);
frame_parms = &eNB->frame_parms;
printf("Getting %d dcis\n",num_dci);
get_dci(frame_parms, log2L, log2Lcommon, format_selector, num_dci, n_rnti);
txdata = eNB->common_vars.txdata[eNb_id];
nsymb = (eNB->frame_parms.Ncp == 0) ? 14 : 12;
printf("Subframe %d, FFT Size %d, Extended Prefix %d, Samples per subframe %d, Symbols per subframe %d\n",
subframe,NUMBER_OF_OFDM_CARRIERS,
eNB->frame_parms.Ncp,eNB->frame_parms.samples_per_tti,nsymb);
eNB2UE = new_channel_desc_scm(eNB->frame_parms.nb_antennas_tx,
UE->frame_parms.nb_antennas_rx,
channel_model,
N_RB2sampling_rate(eNB->frame_parms.N_RB_DL),
N_RB2channel_bandwidth(eNB->frame_parms.N_RB_DL),
0,
0,
0);
eNB_rxtx_proc_t *proc_rxtx = &eNB->proc.proc_rxtx[subframe&1];
eNB->ulsch[0] = new_eNB_ulsch(MAX_TURBO_ITERATIONS,N_RB_DL,0);
UE->ulsch[0] = new_ue_ulsch(N_RB_DL,0);
proc_rxtx->frame_tx = 0;
proc_rxtx->subframe_tx = subframe;
if (input_fd==NULL) {
printf("No input file, so starting TX\n");
} else {
i=0;
while (!feof(input_fd)) {
ret=fscanf(input_fd,"%s %s",input_val_str,input_val_str2);//&input_val1,&input_val2);
if (ret != 2) {
printf("%s:%d:%s: fscanf error, exiting\n", __FILE__, __LINE__, __FUNCTION__);
exit(1);
}
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>(4*FRAME_LENGTH_SAMPLES))
break;
}
printf("Read in %d samples\n",i/4);
write_output("txsig0.m","txs0", txdata[0],FRAME_LENGTH_COMPLEX_SAMPLES,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);
}
UE->UE_mode[0] = PUSCH;
// nCCE_max = get_nCCE(3,&eNB->frame_parms,get_mi(&eNB->frame_parms,0));
//printf("nCCE_max %d\n",nCCE_max);
//printf("num_phich interferers %d\n",num_phich_interf);
for (SNR=snr0; SNR<snr1; SNR+=0.2) {
n_errors_common = 0;
n_errors_ul = 0;
n_errors_dl = 0;
n_errors_cfi = 0;
n_errors_hi = 0;
n_trials_common=0;
n_trials_ul=0;
n_trials_dl=0;
for (trial=0; trial<n_frames; trial++) {
// printf("DCI (SF %d): txdataF %p (0 %p)\n",subframe,&eNB->common_vars.txdataF[eNb_id][aa][512*14*subframe],&eNB->common_vars.txdataF[eNb_id][aa][0]);
for (aa=0; aa<eNB->frame_parms.nb_antennas_tx; aa++) {
memset(&eNB->common_vars.txdataF[eNb_id][aa][0],0,FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX*sizeof(int32_t));
}
generate_pilots_slot(eNB,
eNB->common_vars.txdataF[eNb_id],
AMP, //1024,
(subframe*2),
0);
generate_pilots_slot(eNB,
eNB->common_vars.txdataF[eNb_id],
AMP, //1024,
(subframe*2)+1,
0);
if (input_fd == NULL) {
numCCE=0;
n_trials_common++;
common_active = 1;
if (eNB->frame_parms.N_RB_DL >= 50) {
if (ul_active==1) {
n_trials_ul++;
}
}
if (eNB->frame_parms.N_RB_DL >= 25) {
if (dl_active==1) {
n_trials_dl++;
}
}
num_pdcch_symbols = get_num_pdcch_symbols(DCI_pdu.Num_dci,
DCI_pdu.dci_alloc, frame_parms, subframe);
numCCE = get_nCCE(num_pdcch_symbols,&eNB->frame_parms,get_mi(&eNB->frame_parms,subframe));
if (n_frames==1) {
printf("num_dci %d, num_pddch_symbols %d, nCCE %d\n",
DCI_pdu.Num_dci,
num_pdcch_symbols,numCCE);
}
// apply RNTI-based nCCE allocation
memset(CCE_table,0,800*sizeof(int));
for (i = 0; i < DCI_pdu.Num_dci; i++) {
// SI RNTI
if (DCI_pdu.dci_alloc[i].rnti == SI_RNTI) {
DCI_pdu.dci_alloc[i].firstCCE = get_nCCE_offset_l1(CCE_table,
1<<DCI_pdu.dci_alloc[i].L,
numCCE,
1,
SI_RNTI,
subframe);
}
// RA RNTI
else if (DCI_pdu.dci_alloc[i].ra_flag == 1) {
DCI_pdu.dci_alloc[i].firstCCE = get_nCCE_offset_l1(CCE_table,
1<<DCI_pdu.dci_alloc[i].L,
numCCE,
1,
DCI_pdu.dci_alloc[i].rnti,
subframe);
}
// C RNTI
else {
DCI_pdu.dci_alloc[i].firstCCE = get_nCCE_offset_l1(CCE_table,
1<<DCI_pdu.dci_alloc[i].L,
numCCE,
0,
DCI_pdu.dci_alloc[i].rnti,
subframe);
}
if (n_frames==1)
printf("dci %d: rnti 0x%x, format %d, L %d (aggreg %d), nCCE %d/%d dci_length %d\n",i,DCI_pdu.dci_alloc[i].rnti, DCI_pdu.dci_alloc[i].format,
DCI_pdu.dci_alloc[i].L, 1<<DCI_pdu.dci_alloc[i].L, DCI_pdu.dci_alloc[i].firstCCE, numCCE, DCI_pdu.dci_alloc[i].dci_length);
if (DCI_pdu.dci_alloc[i].firstCCE==-1)
exit(-1);
}
num_pdcch_symbols = generate_dci_top(DCI_pdu.Num_dci,
DCI_pdu.dci_alloc,
0,
AMP,
&eNB->frame_parms,
eNB->common_vars.txdataF[eNb_id],
subframe);
if (n_frames==1)
printf("num_pdcch_symbols at TX %d\n",num_pdcch_symbols);
if (is_phich_subframe(&eNB->frame_parms,subframe)) {
if (n_frames==1)
printf("generating PHICH\n");
harq_pid = phich_subframe_to_harq_pid(&eNB->frame_parms, proc_rxtx->frame_tx, subframe);
phich_ACK = taus()&1;
eNB->ulsch[0]->harq_processes[harq_pid]->phich_active = 1;
eNB->ulsch[0]->harq_processes[harq_pid]->first_rb = 0;
eNB->ulsch[0]->harq_processes[harq_pid]->n_DMRS = 0;
eNB->ulsch[0]->harq_processes[harq_pid]->phich_ACK = phich_ACK;
eNB->ulsch[0]->harq_processes[harq_pid]->dci_alloc = 1;
UE->ulsch[0]->harq_processes[harq_pid]->first_rb = 0;
UE->ulsch[0]->harq_processes[harq_pid]->n_DMRS = 0;
generate_phich_top(eNB,proc_rxtx,AMP,0);
// generate 3 interfering PHICH
if (num_phich_interf>0) {
eNB->ulsch[0]->harq_processes[harq_pid]->first_rb = 4;
generate_phich_top(eNB,proc_rxtx,1024,0);
}
if (num_phich_interf>1) {
eNB->ulsch[0]->harq_processes[harq_pid]->first_rb = 8;
eNB->ulsch[0]->harq_processes[harq_pid]->n_DMRS = 1;
generate_phich_top(eNB,proc_rxtx,1024,0);
}
if (num_phich_interf>2) {
eNB->ulsch[0]->harq_processes[harq_pid]->first_rb = 12;
eNB->ulsch[0]->harq_processes[harq_pid]->n_DMRS = 1;
generate_phich_top(eNB,proc_rxtx,1024,0);
}
eNB->ulsch[0]->harq_processes[harq_pid]->first_rb = 0;
}
// write_output("pilotsF.m","rsF",txdataF[0],lte_eNB->frame_parms.ofdm_symbol_size,1,1);
if (n_frames==1) {
write_output("txsigF0.m","txsF0", eNB->common_vars.txdataF[eNb_id][0],4*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES_NO_PREFIX,1,1);
if (eNB->frame_parms.nb_antenna_ports_eNB > 1)
write_output("txsigF1.m","txsF1", eNB->common_vars.txdataF[eNb_id][1],4*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES_NO_PREFIX,1,1);
}
tx_lev = 0;
for (aa=0; aa<eNB->frame_parms.nb_antenna_ports_eNB; aa++) {
if (eNB->frame_parms.Ncp == 1)
PHY_ofdm_mod(&eNB->common_vars.txdataF[eNb_id][aa][subframe*nsymb*eNB->frame_parms.ofdm_symbol_size], // input,
&txdata[aa][subframe*eNB->frame_parms.samples_per_tti], // output
eNB->frame_parms.ofdm_symbol_size,
2*nsymb, // number of symbols
eNB->frame_parms.nb_prefix_samples, // number of prefix samples
CYCLIC_PREFIX);
else {
normal_prefix_mod(&eNB->common_vars.txdataF[eNb_id][aa][subframe*nsymb*eNB->frame_parms.ofdm_symbol_size],
&txdata[aa][subframe*eNB->frame_parms.samples_per_tti],
2*nsymb,
frame_parms);
}
tx_lev += signal_energy(&txdata[aa][subframe*eNB->frame_parms.samples_per_tti],
eNB->frame_parms.ofdm_symbol_size);
}
tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
}
for (i=0; i<2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++) {
for (aa=0; aa<eNB->frame_parms.nb_antenna_ports_eNB; aa++) {
if (awgn_flag == 0) {
s_re[aa][i] = ((double)(((short *)txdata[aa]))[(2*subframe*UE->frame_parms.samples_per_tti) + (i<<1)]);
s_im[aa][i] = ((double)(((short *)txdata[aa]))[(2*subframe*UE->frame_parms.samples_per_tti) + (i<<1)+1]);
} else {
for (aarx=0; aarx<UE->frame_parms.nb_antennas_rx; aarx++) {
if (aa==0) {
r_re[aarx][i] = ((double)(((short *)txdata[aa]))[(2*subframe*UE->frame_parms.samples_per_tti) + (i<<1)]);
r_im[aarx][i] = ((double)(((short *)txdata[aa]))[(2*subframe*UE->frame_parms.samples_per_tti) + (i<<1)+1]);
} else {
r_re[aarx][i] += ((double)(((short *)txdata[aa]))[(2*subframe*UE->frame_parms.samples_per_tti) + (i<<1)]);
r_im[aarx][i] += ((double)(((short *)txdata[aa]))[(2*subframe*UE->frame_parms.samples_per_tti) + (i<<1)+1]);
}
}
}
}
}
if (awgn_flag == 0) {
multipath_channel(eNB2UE,s_re,s_im,r_re,r_im,
2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0);
}
//write_output("channel0.m","chan0",ch[0],channel_length,1,8);
// scale by path_loss = NOW - P_noise
//sigma2 = pow(10,sigma2_dB/10);
//N0W = -95.87;
sigma2_dB = (double)tx_lev_dB +10*log10((double)eNB->frame_parms.ofdm_symbol_size/(double)(12*eNB->frame_parms.N_RB_DL)) - SNR;
if (n_frames==1)
printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %d\n",sigma2_dB,SNR,tx_lev_dB);
//AWGN
sigma2 = pow(10,sigma2_dB/10);
// printf("Sigma2 %f (sigma2_dB %f)\n",sigma2,sigma2_dB);
for (i=0; i<2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++) {
for (aa=0; aa<UE->frame_parms.nb_antennas_rx; aa++) {
((short*) UE->common_vars.rxdata[aa])[(2*subframe*UE->frame_parms.samples_per_tti) + 2*i] = (short) (.667*(r_re[aa][i] + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
((short*) UE->common_vars.rxdata[aa])[(2*subframe*UE->frame_parms.samples_per_tti) + 2*i+1] = (short) (.667*(r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(
0.0,1.0)));
/*
((short*)UE->common_vars.rxdata[aa])[(2*subframe*UE->frame_parms.samples_per_tti) + 2*i] =
((short*)txdata[aa])[(2*subframe*UE->frame_parms.samples_per_tti) + 2*i];
((short*)UE->common_vars.rxdata[aa])[(2*subframe*UE->frame_parms.samples_per_tti) + 2*i+1] =
((short*)txdata[aa])[(2*subframe*UE->frame_parms.samples_per_tti) + 2*i+1];
*/
}
}
// UE receiver
for (l=0; l<eNB->frame_parms.symbols_per_tti; l++) {
// subframe_offset = (l/eNB->frame_parms.symbols_per_tti)*eNB->frame_parms.samples_per_tti;
// printf("subframe_offset = %d\n",subframe_offset);
slot_fep(UE,
l%(eNB->frame_parms.symbols_per_tti/2),
(2*subframe)+(l/(eNB->frame_parms.symbols_per_tti/2)),
0,
0,
0);
if (UE->perfect_ce == 1) {
if (awgn_flag==0) {
// fill in perfect channel estimates
freq_channel(eNB2UE,UE->frame_parms.N_RB_DL,12*UE->frame_parms.N_RB_DL + 1);
//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 *) UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].dl_ch_estimates[k][(aa<<1)+aarx])[2*i+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(int16_t)(
eNB2UE->chF[aarx+(aa*frame_parms->nb_antennas_rx)][i].x*AMP);
((int16_t *) UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].dl_ch_estimates[k][(aa<<1)+aarx])[2*i+1+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(int16_t)(
eNB2UE->chF[aarx+(aa*frame_parms->nb_antennas_rx)][i].y*AMP);
}
}
}
}
} else {
for(aa=0; aa<frame_parms->nb_antenna_ports_eNB; aa++) {
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
for (i=0; i<frame_parms->N_RB_DL*12; i++) {
((int16_t *) UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].dl_ch_estimates[0][(aa<<1)+aarx])[2*i+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(short)(AMP);
((int16_t *) UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].dl_ch_estimates[0][(aa<<1)+aarx])[2*i+1+(l*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=0/2;
}
}
}
}
}
if (l==((eNB->frame_parms.Ncp==0)?4:3)) {
// write_output("H00.m","h00",&(UE->common_vars.dl_ch_estimates[0][0][0]),((frame_parms->Ncp==0)?7:6)*(eNB->frame_parms.ofdm_symbol_size),1,1);
// do PDCCH procedures here
UE->pdcch_vars[0][0]->crnti = n_rnti;
// printf("Doing RX : num_pdcch_symbols at TX %d\n",num_pdcch_symbols);
rx_pdcch(UE,
trial,
subframe,
0,
(UE->frame_parms.mode1_flag == 1) ? SISO : ALAMOUTI,
UE->high_speed_flag,
UE->is_secondary_ue);
if (is_phich_subframe(&UE->frame_parms,subframe)) {
UE->ulsch[0]->harq_processes[phich_subframe_to_harq_pid(&UE->frame_parms,0,subframe)]->status = ACTIVE;
//UE->ulsch[0]->harq_processes[phich_subframe_to_harq_pid(&UE->frame_parms,0,subframe)]->Ndi = 1;
rx_phich(UE,
&UE->proc.proc_rxtx[subframe&1],
subframe,
0);
}
// if (UE->pdcch_vars[0]->num_pdcch_symbols != num_pdcch_symbols)
// break;
dci_cnt = dci_decoding_procedure(UE,
dci_alloc_rx,1,
0,subframe);
common_rx=0;
ul_rx=0;
dl_rx=0;
if (n_frames==1) {
numCCE = get_nCCE(UE->pdcch_vars[0][0]->num_pdcch_symbols, &UE->frame_parms, get_mi(&UE->frame_parms,subframe));
for (i = 0; i < dci_cnt; i++)
printf("dci %d: rnti 0x%x, format %d, L %d, nCCE %d/%d dci_length %d\n",i, dci_alloc_rx[i].rnti, dci_alloc_rx[i].format,
dci_alloc_rx[i].L, dci_alloc_rx[i].firstCCE, numCCE, dci_alloc_rx[i].dci_length);
}
for (i=0; i<dci_cnt; i++) {
if (dci_alloc_rx[i].rnti == SI_RNTI) {
if (n_frames==1)
dump_dci(&UE->frame_parms, &dci_alloc_rx[i]);
common_rx=1;
}
if ((dci_alloc_rx[i].rnti == n_rnti) && (dci_alloc_rx[i].format == format0)) {
if (n_frames==1)
dump_dci(&UE->frame_parms, &dci_alloc_rx[i]);
ul_rx=1;
}
if ((dci_alloc_rx[i].rnti == n_rnti) && ((dci_alloc_rx[i].format == format1))) {
if (n_frames==1)
dump_dci(&UE->frame_parms, &dci_alloc_rx[i]);
dl_rx=1;
}
if ((dci_alloc_rx[i].rnti != n_rnti) && (dci_alloc_rx[i].rnti != SI_RNTI))
false_detection_cnt++;
}
if (n_frames==1)
printf("RX DCI Num %d (Common DCI %d, DL DCI %d, UL DCI %d)\n", dci_cnt, common_rx, dl_rx, ul_rx);
if ((common_rx==0)&&(common_active==1))
n_errors_common++;
if ((ul_rx==0)&&(ul_active==1)) {
n_errors_ul++;
// exit(-1);
}
if ((dl_rx==0)&&(dl_active==1)) {
n_errors_dl++;
// exit(-1);
}
if (UE->pdcch_vars[0][0]->num_pdcch_symbols != num_pdcch_symbols)
n_errors_cfi++;
/*
if (is_phich_subframe(&UE->frame_parms,subframe))
if (UE->ulsch[0]->harq_processes[phich_subframe_to_harq_pid(&UE->frame_parms, UE->frame, subframe)]->Ndi != phich_ACK)
n_errors_hi++;
*/
if (n_errors_cfi > 10)
break;
}
} // symbol loop
if (n_errors_cfi > 100)
break;
if ((n_errors_ul>1000) && (n_errors_dl>1000) && (n_errors_common>1000))
break;
#ifdef XFORMS
phy_scope_UE(form_ue,
UE,
eNb_id,0,subframe);
#endif
} //trials
if (common_active) printf("SNR %f : n_errors_common = %d/%d (%e)\n", SNR,n_errors_common,n_trials_common,(double)n_errors_common/n_trials_common);
if (ul_active==1) printf("SNR %f : n_errors_ul = %d/%d (%e)\n", SNR,n_errors_ul,n_trials_ul,(double)n_errors_ul/n_trials_ul);
if (dl_active==1) printf("SNR %f : n_errors_dl = %d/%d (%e)\n", SNR,n_errors_dl,n_trials_dl,(double)n_errors_dl/n_trials_dl);
printf("SNR %f : n_errors_cfi = %d/%d (%e)\n", SNR,n_errors_cfi,trial,(double)n_errors_cfi/trial);
printf("SNR %f : n_errors_hi = %d/%d (%e)\n", SNR,n_errors_hi,trial,(double)n_errors_hi/trial);
} // SNR
if (n_frames==1) {
write_output("txsig0.m","txs0", txdata[0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
if (n_tx>1)
write_output("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
write_output("rxsig0.m","rxs0", UE->common_vars.rxdata[0],10*frame_parms->samples_per_tti,1,1);
write_output("rxsigF0.m","rxsF0", UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].rxdataF[0],NUMBER_OF_OFDM_CARRIERS*2*((frame_parms->Ncp==0)?14:12),2,1);
if (n_rx>1) {
write_output("rxsig1.m","rxs1", UE->common_vars.rxdata[1],10*frame_parms->samples_per_tti,1,1);
write_output("rxsigF1.m","rxsF1", UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].rxdataF[1],NUMBER_OF_OFDM_CARRIERS*2*((frame_parms->Ncp==0)?14:12),2,1);
}
write_output("H00.m","h00",&(UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].dl_ch_estimates[0][0][0]),((frame_parms->Ncp==0)?7:6)*(eNB->frame_parms.ofdm_symbol_size),1,1);
if (n_tx==2)
write_output("H10.m","h10",&(UE->common_vars.common_vars_rx_data_per_thread[subframe&0x1].dl_ch_estimates[0][2][0]),((frame_parms->Ncp==0)?7:6)*(eNB->frame_parms.ofdm_symbol_size),1,1);
write_output("pdcch_rxF_ext0.m","pdcch_rxF_ext0",UE->pdcch_vars[0][eNb_id]->rxdataF_ext[0],3*12*UE->frame_parms.N_RB_DL,1,1);
write_output("pdcch_rxF_comp0.m","pdcch0_rxF_comp0",UE->pdcch_vars[0][eNb_id]->rxdataF_comp[0],4*12*UE->frame_parms.N_RB_DL,1,1);
write_output("pdcch_rxF_llr.m","pdcch_llr",UE->pdcch_vars[0][eNb_id]->llr,2400,1,4);
}
lte_sync_time_free();
return(n_errors_ul);
}
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;
#ifdef IFFT_FPGA
int **txdataF2;
#endif
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=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,Nid_cell,N_RB_DL,osf);
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,
BW,
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;
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 = (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 = (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
#ifdef IFFT_FPGA
free(txdataF2[0]);
free(txdataF2[1]);
free(txdataF2);
free(txdata[0]);
free(txdata[1]);
free(txdata);
#endif
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);
}
void configure(int argc, char **argv, int trials, short* iqr, short* iqi, int mmcs, int nrx, int num_bss){
mcs = mmcs;
/**************************************************************************/
char c;
int i, j,u;
double snr0=-2.0,snr1,rate;
double input_snr_step=.2,snr_int=30;
double forgetting_factor=0.0; //in [0,1] 0 means a new channel every time, 1 means keep the same channel
uint8_t extended_prefix_flag=0;
int eNB_id = 0;
int chMod = 0 ;
int UE_id = 0;
unsigned char l;
int **txdata;
unsigned char awgn_flag = 0 ;
SCM_t channel_model=Rice1;
unsigned int coded_bits_per_codeword,nsymb;
uint8_t transmission_mode=1,n_tx=1;
n_rx = nrx;
FILE *input_fdUL=NULL;
short input_val_str, input_val_str2;
int n_frames=1000;
int n_ch_rlz = 1;
int abstx = 0;
channel_desc_t *UE2eNB;
int delay = 0;
double maxDoppler = 0.0;
uint8_t srs_flag = 0;
uint8_t N_RB_DL=50,osf=1;
uint8_t beta_ACK=0,beta_RI=0,beta_CQI=2;
uint8_t tdd_config=3,frame_type=FDD;
uint8_t N0=30;
double tx_gain=1.0;
double cpu_freq_GHz;
int s;
int dump_perf=0;
int test_perf=0;
int dump_table =0;
double effective_rate=0.0;
char channel_model_input[10];
uint8_t max_turbo_iterations=4;
int nb_rb_set = 0;
int sf;
/***************************************************************************/
logInit();
while ((c = getopt (argc, argv, "hapZbm:n:Y:X:x:s:w:e:q:d:D:O:c:r:i:f:y:c:oA:C:R:g:N:l:S:T:QB:PI:L")) != -1) {
switch (c) {
case 'a':
channel_model = AWGN;
chMod = 1;
break;
case 'b':
bundling_flag = 0;
break;
case 'd':
delay = atoi(optarg);
break;
case 'D':
maxDoppler = atoi(optarg);
break;
case 'm':
mcs = atoi(optarg);
break;
case 'n':
n_frames = atoi(optarg);
break;
case 'Y':
n_ch_rlz = atoi(optarg);
break;
case 'X':
abstx= atoi(optarg);
break;
case 'g':
sprintf(channel_model_input,optarg,10);
switch((char)*optarg) {
case 'A':
channel_model=SCM_A;
chMod = 2;
break;
case 'B':
channel_model=SCM_B;
chMod = 3;
break;
case 'C':
channel_model=SCM_C;
chMod = 4;
break;
case 'D':
channel_model=SCM_D;
chMod = 5;
break;
case 'E':
channel_model=EPA;
chMod = 6;
break;
case 'F':
channel_model=EVA;
chMod = 7;
break;
case 'G':
channel_model=ETU;
chMod = 8;
break;
case 'H':
channel_model=Rayleigh8;
chMod = 9;
break;
case 'I':
channel_model=Rayleigh1;
chMod = 10;
break;
case 'J':
channel_model=Rayleigh1_corr;
chMod = 11;
break;
case 'K':
channel_model=Rayleigh1_anticorr;
chMod = 12;
break;
case 'L':
channel_model=Rice8;
chMod = 13;
break;
case 'M':
channel_model=Rice1;
chMod = 14;
break;
case 'N':
channel_model=AWGN;
chMod = 1;
break;
default:
msg("Unsupported channel model!\n");
exit(-1);
break;
}
break;
case 's':
snr0 = atof(optarg);
break;
case 'w':
snr_int = atof(optarg);
break;
case 'e':
input_snr_step= atof(optarg);
break;
case 'x':
transmission_mode=atoi(optarg);
if ((transmission_mode!=1) &&
(transmission_mode!=2)) {
msg("Unsupported transmission mode %d\n",transmission_mode);
exit(-1);
}
if (transmission_mode>1) {
n_tx = 1;
}
break;
case 'y':
n_rx = atoi(optarg);
break;
case 'S':
subframe = atoi(optarg);
break;
case 'T':
tdd_config=atoi(optarg);
frame_type=TDD;
break;
case 'p':
extended_prefix_flag=1;
break;
case 'r':
nb_rb = atoi(optarg);
nb_rb_set = 1;
break;
case 'f':
first_rb = atoi(optarg);
break;
case 'c':
cyclic_shift = atoi(optarg);
break;
case 'N':
N0 = atoi(optarg);
break;
case 'o':
srs_flag = 1;
break;
case 'i':
input_fdUL = fopen(optarg,"r");
printf("Reading in %s (%p)\n",optarg,input_fdUL);
if (input_fdUL == (FILE*)NULL) {
printf("Unknown file %s\n",optarg);
exit(-1);
}
// input_file=1;
break;
case 'A':
beta_ACK = atoi(optarg);
if (beta_ACK>15) {
printf("beta_ack must be in (0..15)\n");
exit(-1);
}
break;
case 'C':
beta_CQI = atoi(optarg);
if ((beta_CQI>15)||(beta_CQI<2)) {
printf("beta_cqi must be in (2..15)\n");
exit(-1);
}
break;
case 'R':
beta_RI = atoi(optarg);
if ((beta_RI>15)||(beta_RI<2)) {
printf("beta_ri must be in (0..13)\n");
exit(-1);
}
break;
case 'Q':
cqi_flag=1;
break;
case 'B':
N_RB_DL=atoi(optarg);
break;
case 'P':
dump_perf=1;
opp_enabled=1;
break;
case 'O':
test_perf=atoi(optarg);
//print_perf =1;
break;
case 'L':
llr8_flag=1;
break;
case 'I':
max_turbo_iterations=atoi(optarg);
break;
case 'Z':
dump_table = 1;
break;
case 'h':
default:
printf("%s -h(elp) -a(wgn on) -m mcs -n n_frames -s snr0 -t delay_spread -p (extended prefix on) -r nb_rb -f first_rb -c cyclic_shift -o (srs on) -g channel_model [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'), -d Channel delay, -D maximum Doppler shift \n",
argv[0]);
exit(1);
break;
}
}
lte_param_init(1,n_rx,1,extended_prefix_flag,N_RB_DL,frame_type,tdd_config,osf, num_bss);
int loop = 0;
for (loop = 0; loop < num_bss; loop++){
if (nb_rb_set == 0){
nb_rb = PHY_vars_eNB[loop]->lte_frame_parms.N_RB_UL;
}
// frame_parms = &PHY_vars_eNB[loop]->lte_frame_parms;
txdata = PHY_vars_UE[loop]->lte_ue_common_vars.txdata;
nsymb = (PHY_vars_eNB[loop]->lte_frame_parms.Ncp == 0) ? 14 : 12;
coded_bits_per_codeword = nb_rb * (12 * get_Qm(mcs)) * nsymb;
rate = (double)2*dlsch_tbs25[get_I_TBS(mcs)][25-1]/(coded_bits_per_codeword);
PHY_vars_UE[loop]->lte_ue_pdcch_vars[0]->crnti = 14;
PHY_vars_UE[loop]->lte_frame_parms.soundingrs_ul_config_common.srs_BandwidthConfig = 2;
PHY_vars_UE[loop]->lte_frame_parms.soundingrs_ul_config_common.srs_SubframeConfig = 7;
PHY_vars_UE[loop]->soundingrs_ul_config_dedicated[eNB_id].srs_Bandwidth = 0;
PHY_vars_UE[loop]->soundingrs_ul_config_dedicated[eNB_id].transmissionComb = 0;
PHY_vars_UE[loop]->soundingrs_ul_config_dedicated[eNB_id].freqDomainPosition = 0;
PHY_vars_eNB[loop]->lte_frame_parms.soundingrs_ul_config_common.srs_BandwidthConfig = 2;
PHY_vars_eNB[loop]->lte_frame_parms.soundingrs_ul_config_common.srs_SubframeConfig = 7;
PHY_vars_eNB[loop]->soundingrs_ul_config_dedicated[UE_id].srs_ConfigIndex = 1;
PHY_vars_eNB[loop]->soundingrs_ul_config_dedicated[UE_id].srs_Bandwidth = 0;
PHY_vars_eNB[loop]->soundingrs_ul_config_dedicated[UE_id].transmissionComb = 0;
PHY_vars_eNB[loop]->soundingrs_ul_config_dedicated[UE_id].freqDomainPosition = 0;
PHY_vars_eNB[loop]->cooperation_flag = cooperation_flag;
// PHY_vars_eNB[loop]->eNB_UE_stats[0].SRS_parameters = PHY_vars_UE[loop]->SRS_parameters;
PHY_vars_eNB[loop]->pusch_config_dedicated[UE_id].betaOffset_ACK_Index = beta_ACK;
PHY_vars_eNB[loop]->pusch_config_dedicated[UE_id].betaOffset_RI_Index = beta_RI;
PHY_vars_eNB[loop]->pusch_config_dedicated[UE_id].betaOffset_CQI_Index = beta_CQI;
PHY_vars_UE[loop]->pusch_config_dedicated[eNB_id].betaOffset_ACK_Index = beta_ACK;
PHY_vars_UE[loop]->pusch_config_dedicated[eNB_id].betaOffset_RI_Index = beta_RI;
PHY_vars_UE[loop]->pusch_config_dedicated[eNB_id].betaOffset_CQI_Index = beta_CQI;
PHY_vars_UE[loop]->ul_power_control_dedicated[eNB_id].deltaMCS_Enabled = 1;
UE2eNB = new_channel_desc_scm(PHY_vars_eNB[loop]->lte_frame_parms.nb_antennas_tx,
PHY_vars_UE[loop]->lte_frame_parms.nb_antennas_rx,
channel_model,
BW,
forgetting_factor,
delay,
0);
// set Doppler
UE2eNB->max_Doppler = maxDoppler;
// NN: N_RB_UL has to be defined in ulsim
PHY_vars_eNB[loop]->ulsch_eNB[0] = new_eNB_ulsch(8,max_turbo_iterations,N_RB_DL,0);
PHY_vars_UE[loop]->ulsch_ue[0] = new_ue_ulsch(8,N_RB_DL,0);
// Create transport channel structures for 2 transport blocks (MIMO)
for (i=0; i<2; i++) {
PHY_vars_eNB[loop]->dlsch_eNB[0][i] = new_eNB_dlsch(1,8,N_RB_DL,0);
PHY_vars_UE[loop]->dlsch_ue[0][i] = new_ue_dlsch(1,8,MAX_TURBO_ITERATIONS,N_RB_DL,0);
if (!PHY_vars_eNB[loop]->dlsch_eNB[0][i]) {
printf("Can't get eNB dlsch structures\n");
exit(-1);
}
if (!PHY_vars_UE[loop]->dlsch_ue[0][i]) {
printf("Can't get ue dlsch structures\n");
exit(-1);
}
PHY_vars_eNB[loop]->dlsch_eNB[0][i]->rnti = 14;
PHY_vars_UE[loop]->dlsch_ue[0][i]->rnti = 14;
}
switch (PHY_vars_eNB[loop]->lte_frame_parms.N_RB_UL) {
case 6:
break;
case 50:
if (PHY_vars_eNB[loop]->lte_frame_parms.frame_type == TDD) {
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->type = 0;
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB[loop]->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB[loop]->lte_frame_parms.N_RB_UL,((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->mcs = mcs;
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->ndi = 1;
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->TPC = 0;
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->cshift = 0;
((DCI0_10MHz_TDD_1_6_t*)&UL_alloc_pdu)->dai = 1;
} else {
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->type = 0;
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->rballoc = computeRIV(PHY_vars_eNB[loop]->lte_frame_parms.N_RB_UL,first_rb,nb_rb);// 12 RBs from position 8
printf("nb_rb %d/%d, rballoc %d (dci %x)\n",nb_rb,PHY_vars_eNB[loop]->lte_frame_parms.N_RB_UL,((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->rballoc,*(uint32_t *)&UL_alloc_pdu);
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->mcs = mcs;
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->ndi = 1;
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->TPC = 0;
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->cqi_req = cqi_flag&1;
((DCI0_10MHz_FDD_t*)&UL_alloc_pdu)->cshift = 0;
}
break;
default:
break;
}
PHY_vars_UE[loop]->PHY_measurements.rank[0] = 0;
PHY_vars_UE[loop]->transmission_mode[0] = 2;
PHY_vars_UE[loop]->pucch_config_dedicated[0].tdd_AckNackFeedbackMode = bundling_flag == 1 ? bundling : multiplexing;
PHY_vars_eNB[loop]->transmission_mode[0] = 2;
PHY_vars_eNB[loop]->pucch_config_dedicated[0].tdd_AckNackFeedbackMode = bundling_flag == 1 ? bundling : multiplexing;
PHY_vars_UE[loop]->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupHoppingEnabled = 1;
PHY_vars_eNB[loop]->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupHoppingEnabled = 1;
PHY_vars_UE[loop]->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.sequenceHoppingEnabled = 0;
PHY_vars_eNB[loop]->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.sequenceHoppingEnabled = 0;
PHY_vars_UE[loop]->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupAssignmentPUSCH = 0;
PHY_vars_eNB[loop]->lte_frame_parms.pusch_config_common.ul_ReferenceSignalsPUSCH.groupAssignmentPUSCH = 0;
PHY_vars_UE[loop]->frame_tx=1;
for (sf=0; sf<10; sf++) {
PHY_vars_eNB[loop]->proc[sf].frame_tx=1;
PHY_vars_eNB[loop]->proc[sf].subframe_tx=sf;
PHY_vars_eNB[loop]->proc[sf].frame_rx=1;
PHY_vars_eNB[loop]->proc[sf].subframe_rx=sf;
}
msg("Init UL hopping UE\n");
init_ul_hopping(&PHY_vars_UE[loop]->lte_frame_parms);
msg("Init UL hopping eNB\n");
init_ul_hopping(&PHY_vars_eNB[loop]->lte_frame_parms);
PHY_vars_eNB[loop]->proc[subframe].frame_rx = PHY_vars_UE[loop]->frame_tx;
if (ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB[loop]->lte_frame_parms,subframe) > subframe) // allocation was in previous frame
PHY_vars_eNB[loop]->proc[ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB[loop]->lte_frame_parms,subframe)].frame_tx = (PHY_vars_UE[loop]->frame_tx-1)&1023;
PHY_vars_UE[loop]->dlsch_ue[0][0]->harq_ack[ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB[loop]->lte_frame_parms,subframe)].send_harq_status = 1;
PHY_vars_UE[loop]->frame_tx = (PHY_vars_UE[loop]->frame_tx-1)&1023;
printf("**********************here=1**************************\n");
generate_ue_ulsch_params_from_dci((void *)&UL_alloc_pdu,
14,
ul_subframe2pdcch_alloc_subframe(&PHY_vars_UE[loop]->lte_frame_parms,subframe),
format0,
PHY_vars_UE[loop],
SI_RNTI,
0,
P_RNTI,
CBA_RNTI,
0,
srs_flag);
if (PHY_vars_eNB[loop]->ulsch_eNB[0] != NULL)
generate_eNB_ulsch_params_from_dci((void *)&UL_alloc_pdu,
14,
ul_subframe2pdcch_alloc_subframe(&PHY_vars_eNB[loop]->lte_frame_parms,subframe),
format0,
0,
PHY_vars_eNB[loop],
SI_RNTI,
0,
P_RNTI,
CBA_RNTI,
srs_flag);
PHY_vars_UE[loop]->frame_tx = (PHY_vars_UE[loop]->frame_tx+1)&1023;
printf("**********************here=2**************************\n");
int round = 0;
harq_pid = subframe2harq_pid(&PHY_vars_UE[loop]->lte_frame_parms,PHY_vars_UE[loop]->frame_tx,subframe);
// fflush(stdout);
PHY_vars_eNB[loop]->ulsch_eNB[0]->harq_processes[harq_pid]->round=round;
PHY_vars_UE[loop]->ulsch_ue[0]->harq_processes[harq_pid]->round=round;
PHY_vars_eNB[loop]->ulsch_eNB[0]->harq_processes[harq_pid]->rvidx = round>>1;
PHY_vars_UE[loop]->ulsch_ue[0]->harq_processes[harq_pid]->rvidx = round>>1;
/////////////////////
int aa = 0; int ii=0;
for(ii=0; ii< PHY_vars_eNB[loop]->lte_frame_parms.samples_per_tti; ii++){
for (aa=0; aa < n_rx; aa++){
((short*) &PHY_vars_eNB[loop]->lte_eNB_common_vars.rxdata[0][aa][PHY_vars_eNB[loop]->lte_frame_parms.samples_per_tti*subframe])[2*ii] = iqr[ii];
((short*) &PHY_vars_eNB[loop]->lte_eNB_common_vars.rxdata[0][aa][PHY_vars_eNB[loop]->lte_frame_parms.samples_per_tti*subframe])[2*ii +1] = iqi[ii];
}
}
printf("Loaded %d IQ samples\n", PHY_vars_eNB[loop]->lte_frame_parms.samples_per_tti);
lte_eNB_I0_measurements(PHY_vars_eNB[loop], 0, 1);
PHY_vars_eNB[loop]->ulsch_eNB[0]->cyclicShift = cyclic_shift;// cyclic shift for DMRS
remove_7_5_kHz(PHY_vars_eNB[loop],subframe<<1);
remove_7_5_kHz(PHY_vars_eNB[loop],1+(subframe<<1));
}
}
int main(int argc, char *argv[]) {
int ret,ret2;
unsigned int errors,uerrors,errors2,crc_misses,iterations,trials,trials2,block_length,errors3,trials3;
double SNR,sigma,rate=.5;
unsigned char qbits,mcs;
char done0=0;
char done1=1;
char done2=1;
unsigned short iind;
unsigned int coded_bits;
unsigned char NB_RB=25;
int num_pdcch_symbols = 3;
int subframe = 6;
randominit(0);
logInit();
lte_param_init(1,1,1,0,0,3);
PHY_vars_eNB->dlsch_eNB[0][0] = new_eNB_dlsch(1,8,0);
PHY_vars_UE->dlsch_ue[0][0] = new_ue_dlsch(1,8,0);
PHY_vars_eNB->dlsch_eNB[0][1] = new_eNB_dlsch(1,8,0);
PHY_vars_UE->dlsch_ue[0][1] = new_ue_dlsch(1,8,0);
if (argc>1)
mcs = atoi(argv[1]);
else
mcs = 0;
printf("NB_RB %d\n",NB_RB);
DLSCH_alloc_pdu2.rah = 0;
DLSCH_alloc_pdu2.rballoc = DLSCH_RB_ALLOC;
DLSCH_alloc_pdu2.TPC = 0;
DLSCH_alloc_pdu2.dai = 0;
DLSCH_alloc_pdu2.harq_pid = 0;
DLSCH_alloc_pdu2.tb_swap = 0;
DLSCH_alloc_pdu2.mcs1 = mcs;
DLSCH_alloc_pdu2.ndi1 = 1;
DLSCH_alloc_pdu2.rv1 = 0;
if (argc>2)
qbits = atoi(argv[2]);
else
qbits = 4;
printf("Quantization bits %d\n",qbits);
generate_eNB_dlsch_params_from_dci(subframe,
&DLSCH_alloc_pdu2,
0x1234,
format2_2A_M10PRB,
PHY_vars_eNB->dlsch_eNB[0],
&PHY_vars_eNB->lte_frame_parms,
SI_RNTI,
0,
P_RNTI,
0); //change this later
generate_ue_dlsch_params_from_dci(subframe,
&DLSCH_alloc_pdu2,
C_RNTI,
format2_2A_M10PRB,
PHY_vars_UE->dlsch_ue[0],
&PHY_vars_UE->lte_frame_parms,
SI_RNTI,
0,
P_RNTI);
coded_bits = get_G(&PHY_vars_eNB->lte_frame_parms,NB_RB,PHY_vars_eNB->dlsch_eNB[0][0]->rb_alloc,
get_Qm(mcs),num_pdcch_symbols,subframe);
printf("Coded_bits (G) = %d\n",coded_bits);
block_length = dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1]>>3;
printf("Block_length = %d bytes (%d bits, rate %f), mcs %d, I_TBS %d, NB_RB %d\n",block_length,
dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1],(double)dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1]/coded_bits,
mcs,get_I_TBS(mcs),NB_RB);
// Test Openair0 3GPP encoder
/*
test_encoder(block_length,
f1f2mat[(block_length-5)*2], // f1 (see 36121-820, page 14)
f1f2mat[((block_length-5)*2)+1], // f2 (see 36121-820, page 14)
3);
*/ // exit(0);
for (SNR=-6;SNR<16;SNR+=.5) {
// printf("\n\nSNR %f dB\n",SNR);
sigma = pow(10.0,-.05*SNR);
errors=0;
crc_misses=0;
errors2=0;
errors3=0;
iterations=0;
if (done0 == 0) {
ret = test_logmap8(PHY_vars_eNB->dlsch_eNB[0][0],
PHY_vars_UE->dlsch_ue[0][0],
coded_bits,
NB_RB,
sigma, // noise standard deviation
qbits,
block_length, // block length bytes
NTRIALS,
&errors,
&trials,
&uerrors,
&crc_misses,
&iterations,
num_pdcch_symbols,
subframe);
if (ret>=0)
// printf("ref: Errors %d (%f), Uerrors %d (%f), CRC Misses %d (%f), Avg iterations %f\n",errors,(double)errors/trials,uerrors,(double)uerrors/trials,crc_misses,(double)crc_misses/trials,(double)iterations/trials);
printf("%f,%f,%f,%f\n",SNR,(double)errors/trials,(double)crc_misses/trials,(double)iterations/trials);
if (((double)errors/trials) < 1e-2)
done0=1;
}
/*
if (done1 == 0) {
printf("exmimo\n");
ret = test_logmapexmimo(rate, // code rate
sigma, // noise standard deviation
qbits,
block_length, // block length bytes
f1f2mat[iind*2], // f1 (see 36121-820, page 14)
f1f2mat[(iind*2)+1], // f2 (see 36121-820, page 14)
3,
NTRIALS,
&errors3,
&trials3);
if (ret>=0)
printf("exmimo : Errors %d (%f)\n",errors3,(double)errors3/trials3);
if (((double)errors3/trials3) < 1e-3)
done1=1;
}
if (done2 == 0) {
printf("Viterbi ...\n");
ret2 = test_viterbi(sigma,
8*block_length,
NTRIALS,
&errors2,
&trials2,
rate);
if (ret2>=0)
printf("viterbi : Errors %d (%f)\n",errors2,(double)errors2/trials2);
if (((double)errors2/trials2) < 1e-3)
done2=1;
}
*/
if ((done0==1) && (done1==1) && (done2==1)) {
printf("done\n");
break;
}
}
return(0);
}
int main(int argc, char **argv) {
char c;
int i,aa,aarx;
double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1=0.0;
u8 snr1set=0;
//mod_sym_t **txdataF;
#ifdef IFFT_FPGA
int **txdataF2;
#endif
int **txdata;
double **s_re,**s_im,**r_re,**r_im;
double ricean_factor=0.0000005,Td=.8,iqim=0.0;
u8 channel_length;
int trial, ntrials=1;
u8 transmission_mode = 1,n_tx=1,n_rx=1;
u16 Nid_cell=0;
u8 awgn_flag=0;
int n_frames=1;
channel_desc_t *UE2eNB;
u32 nsymb,tx_lev,tx_lev_dB;
u8 extended_prefix_flag=0;
s8 interf1=-19,interf2=-19;
LTE_DL_FRAME_PARMS *frame_parms;
#ifdef EMOS
fifo_dump_emos emos_dump;
#endif
SCM_t channel_model=Rayleigh1_corr;
u8 abstraction_flag=0,calibration_flag=0;
// double prach_sinr;
u8 osf=1,N_RB_DL=25;
u32 prach_errors=0;
u8 subframe=3;
u16 preamble_energy_list[64],preamble_tx=99,preamble_delay_list[64];
u16 preamble_max,preamble_energy_max;
PRACH_RESOURCES_t prach_resources;
u8 prach_fmt;
int N_ZC;
channel_length = (int) 11+2*BW*Td;
// 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, "haA:Cr:p:g:i:j:n:s:S:t:x:y:z:N:F:")) != -1)
{
switch (c)
{
case 'a':
printf("Running AWGN simulation\n");
awgn_flag = 1;
ntrials=1;
break;
case 'g':
switch((char)*optarg) {
case 'A':
channel_model=SCM_A;
break;
case 'B':
channel_model=SCM_B;
break;
case 'C':
channel_model=SCM_C;
break;
case 'D':
channel_model=SCM_D;
break;
case 'E':
channel_model=EPA;
break;
case 'F':
channel_model=EVA;
break;
case 'G':
channel_model=ETU;
break;
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;
break;
default:
msg("Unsupported channel model!\n");
exit(-1);
}
break;
case 'i':
interf1=atoi(optarg);
break;
case 'j':
interf2=atoi(optarg);
break;
case 'n':
n_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 't':
Td= atof(optarg);
break;
case 'p':
preamble_tx=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);
}
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 'A':
abstraction_flag=1;
ntrials=10000;
msg("Running Abstraction test\n");
break;
case 'C':
calibration_flag=1;
msg("Running Abstraction calibration for Bias removal\n");
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 -t Delayspread -r Ricean_FactordB -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("-p Use extended prefix mode\n");
printf("-n Number of frames to simulate\n");
printf("-r Ricean factor (dB, 0 means Rayleigh, 100 is almost AWGN\n");
printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB. If n_frames is 1 then just SNR is simulated\n");
printf("-S Ending SNR, runs from SNR0 to SNR1\n");
printf("-t Delay spread for multipath channel\n");
printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n");
printf("-x Transmission mode (1,2,6 for the moment)\n");
printf("-y Number of TX antennas used in eNB\n");
printf("-z Number of RX antennas used in UE\n");
printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n");
printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n");
printf("-N Nid_cell\n");
printf("-R N_RB_DL\n");
printf("-O oversampling factor (1,2,4,8,16)\n");
printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n");
printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n");
printf("-f PRACH format (0=1,1=2,2=3,3=4)\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,Nid_cell,N_RB_DL,osf);
if (snr1set==0) {
if (n_frames==1)
snr1 = snr0+.1;
else
snr1 = snr0+5.0;
}
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 = (double **)malloc(2*sizeof(double*));
s_im = (double **)malloc(2*sizeof(double*));
r_re = (double **)malloc(2*sizeof(double*));
r_im = (double **)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_eNB->lte_frame_parms.nb_antennas_tx,
PHY_vars_UE->lte_frame_parms.nb_antennas_rx,
channel_model,
BW,
0.0,
0,
0);
if (UE2eNB==NULL) {
msg("Problem generating channel model. Exiting.\n");
exit(-1);
}
for (i=0;i<2;i++) {
s_re[i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_re[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_im[i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_im[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_re[i] = (double *)malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_re[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_im[i] = (double *)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=1;
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=1;
PHY_vars_UE->lte_frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=0;
PHY_vars_UE->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
PHY_vars_eNB->lte_frame_parms.prach_config_common.rootSequenceIndex=1;
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=1;
PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.highSpeedFlag=0;
PHY_vars_eNB->lte_frame_parms.prach_config_common.prach_ConfigInfo.prach_FreqOffset=0;
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 = (prach_fmt <4)?839:139;
compute_prach_seq(prach_root_sequence_map0_3[PHY_vars_eNB->lte_frame_parms.prach_config_common.rootSequenceIndex],N_ZC, PHY_vars_eNB->X_u[0]);
compute_prach_seq(prach_root_sequence_map0_3[PHY_vars_UE->lte_frame_parms.prach_config_common.rootSequenceIndex],N_ZC, PHY_vars_UE->X_u[0]);
PHY_vars_UE->lte_ue_prach_vars[0]->amp = (s32)scfdma_amps[6];
PHY_vars_UE->prach_resources[0] = &prach_resources;
if (preamble_tx == 99)
preamble_tx = (u16)(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 = (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*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES;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) {
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_channel(UE2eNB,s_re,s_im,r_re,r_im,
2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,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((double)tx_lev));
}
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++) {
((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++;
if (n_frames==1) {
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_UE->lte_ue_prach_vars[0]->prachF[0],6144,1,1);
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: errors %d/%d\n",SNR,prach_errors,n_frames);
}
#ifdef IFFT_FPGA
free(txdataF2[0]);
free(txdataF2[1]);
free(txdataF2);
free(txdata[0]);
free(txdata[1]);
free(txdata);
#endif
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();
system("PAUSE");
return(0);
}
int main(int argc, char **argv) {
char c;
int i,aa,s,ind,Kr,Kr_bytes;;
double sigma2, sigma2_dB=10,SNR,snr0=-2.0,snr1,SNRmeas;
//int **txdataF, **txdata;
int **txdata;
#ifdef IFFT_FPGA
int **txdataF2;
#endif
//LTE_DL_FRAME_PARMS *frame_parms = (LTE_DL_FRAME_PARMS *)malloc(sizeof(LTE_DL_FRAME_PARMS));
//LTE_UE_COMMON *lte_ue_common_vars = (LTE_UE_COMMON *)malloc(sizeof(LTE_UE_COMMON));
double **s_re,**s_im,**r_re,**r_im;
double amps[8] = {0.3868472 , 0.3094778 , 0.1547389 , 0.0773694 , 0.0386847 , 0.0193424 , 0.0096712 , 0.0038685};
double aoa=.03,ricean_factor=1; //0.0000005;
int channel_length;
struct complex **ch;
int eNb_id = 0, eNb_id_i = 1;
unsigned char mcs,dual_stream_UE = 0;
unsigned short NB_RB=conv_nprb(0,DLSCH_RB_ALLOC);
unsigned char Ns,l,m;
unsigned char *input_data,*decoded_output;
unsigned char *input_buffer;
unsigned short input_buffer_length;
unsigned int ret;
unsigned int coded_bits_per_codeword,nsymb,dci_cnt;
unsigned int tx_lev,tx_lev_dB,trials,errs=0,dci_errors=0,dlsch_active=0,num_layers;
int re_allocated;
FILE *bler_fd;
FILE *csv_fd;
char bler_fname[20];
char csv_fname[20];
unsigned char pbch_pdu[6];
DCI_ALLOC_t dci_alloc[8],dci_alloc_rx[8];
FILE *rx_frame_file;
int result;
int n_frames;
int cnt=0;
int rx_lev_data_sym;
int rx_lev_null_sym;
int rx_snr_dB;
void *data;
int ii;
int bler;
double blerr;
int ch_realization;
channel_length = (int) 11+2*BW*Td;
lte_param_init(1,1,1);
num_layers = 1;
//int cont=0;
// default parameters
//for (cont =0;cont<29;cont++){
mcs = 0;
n_frames = 1000;
snr0 = 2;
//if(snr0>0)
// snr0 = 0;
while ((c = getopt (argc, argv, "hm:n:s:")) != -1)
{
switch (c)
{
case 'h':
printf("%s -h(elp) -m mcs -n n_frames -s snr0\n",argv[0]);
exit(1);
case 'm':
mcs = atoi(optarg);
break;
case 'n':
n_frames = atoi(optarg);
break;
case 's':
snr0 = atoi(optarg);
break;
default:
printf("%s -h(elp) -m mcs -n n_frames -s snr0\n",argv[0]);
exit (-1);
break;
}
}
printf("Setting mcs = %d\n",mcs);
printf("NPRB = %d\n",NB_RB);
printf("n_frames = %d\n",n_frames);
/*
snr0 = -7 + mcs;
if(snr0>0)
snr0 = ;
*/
snr1 = snr0+20;
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);
*/
#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
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 = (lte_frame_parms->Ncp == 0) ? 14 : 12;
coded_bits_per_codeword = NB_RB * (12 * get_Qm(mcs)) * (lte_frame_parms->num_dlsch_symbols);
printf("Rate = %f (mod %d)\n",(((double)dlsch_tbs25[get_I_TBS(mcs)][NB_RB-1])*3/4)/coded_bits_per_codeword,
get_Qm(mcs));
sprintf(bler_fname,"bler_%d.m",mcs);
bler_fd = fopen(bler_fname,"w");
fprintf(bler_fd,"bler = [");
// CSV file
sprintf(csv_fname,"data_out%d.m",mcs);
csv_fd = fopen(csv_fname,"w");
fprintf(csv_fd,"data_all=[");
for (i=0;i<2;i++) {
s_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_re[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_im[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
}
PHY_vars_UE->lte_ue_pdcch_vars[0]->crnti = 0x1234;
// 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.rah = 0;
DLSCH_alloc_pdu2.rballoc = DLSCH_RB_ALLOC;
DLSCH_alloc_pdu2.TPC = 0;
DLSCH_alloc_pdu2.dai = 0;
DLSCH_alloc_pdu2.harq_pid = 0;
DLSCH_alloc_pdu2.tb_swap = 0;
DLSCH_alloc_pdu2.mcs1 = mcs;
DLSCH_alloc_pdu2.ndi1 = 1;
DLSCH_alloc_pdu2.rv1 = 0;
// Forget second codeword
DLSCH_alloc_pdu2.tpmi = 5 ; // precoding
// Create transport channel structures for SI pdus
PHY_vars_eNb->dlsch_eNb_cntl = new_eNb_dlsch(1,1);
PHY_vars_UE->dlsch_ue_cntl = new_ue_dlsch(1,1);
// Create transport channel structures for 2 transport blocks (MIMO)
PHY_vars_eNb->dlsch_eNb = (LTE_eNb_DLSCH_t**) malloc16(2*sizeof(LTE_eNb_DLSCH_t*));
PHY_vars_UE->dlsch_ue = (LTE_UE_DLSCH_t**) malloc16(2*sizeof(LTE_UE_DLSCH_t*));
for (i=0;i<2;i++) {
PHY_vars_eNb->dlsch_eNb[i] = new_eNb_dlsch(1,8);
PHY_vars_UE->dlsch_ue[i] = new_ue_dlsch(1,8);
if (!PHY_vars_eNb->dlsch_eNb[i]) {
printf("Can't get eNb dlsch structures\n");
exit(-1);
}
if (!PHY_vars_UE->dlsch_ue[i]) {
printf("Can't get ue dlsch structures\n");
exit(-1);
}
}
if (DLSCH_alloc_pdu2.tpmi == 5) {
PHY_vars_eNb->dlsch_eNb[0]->pmi_alloc = (unsigned short)(taus()&0xffff);
PHY_vars_UE->dlsch_ue[0]->pmi_alloc = PHY_vars_eNb->dlsch_eNb[0]->pmi_alloc;
PHY_vars_eNb->eNB_UE_stats[0].DL_pmi_single[0] = PHY_vars_eNb->dlsch_eNb[0]->pmi_alloc;
}
generate_eNb_dlsch_params_from_dci(0,
&DLSCH_alloc_pdu2,
0x1234,
format2_2A_M10PRB,
PHY_vars_eNb->dlsch_eNb,
lte_frame_parms,
SI_RNTI,
RA_RNTI,
P_RNTI,
0); //change this later
/*
generate_eNb_dlsch_params_from_dci(0,
&CCCH_alloc_pdu,
SI_RNTI,
format1A,
&dlsch_eNb_cntl,
lte_frame_parms,
SI_RNTI,
RA_RNTI,
P_RNTI);
*/
// input_data = (unsigned char*) malloc(block_length/8);
// decoded_output = (unsigned char*) malloc(block_length/8);
// DCI
memcpy(&dci_alloc[0].dci_pdu[0],&DLSCH_alloc_pdu2,sizeof(DCI2_5MHz_2A_M10PRB_TDD_t));
dci_alloc[0].dci_length = sizeof_DCI2_5MHz_2A_M10PRB_TDD_t;
dci_alloc[0].L = 3;
dci_alloc[0].rnti = 0x1234;
/*
memcpy(&dci_alloc[0].dci_pdu[0],&CCCH_alloc_pdu,sizeof(DCI1A_5MHz_TDD_1_6_t));
dci_alloc[0].dci_length = sizeof_DCI1A_5MHz_TDD_1_6_t;
dci_alloc[0].L = 3;
dci_alloc[0].rnti = SI_RNTI;
*/
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 = 3;
dci_alloc[1].rnti = 0x1234;
// DLSCH
if (1) {
input_buffer_length = PHY_vars_eNb->dlsch_eNb[0]->harq_processes[0]->TBS/8;
printf("dlsch0: TBS %d\n",PHY_vars_eNb->dlsch_eNb[0]->harq_processes[0]->TBS);
printf("Input buffer size %d bytes\n",input_buffer_length);
input_buffer = (unsigned char *)malloc(input_buffer_length+4);
for (i=0;i<input_buffer_length;i++)
input_buffer[i]= (unsigned char)(taus()&0xff);
dlsch_encoding(input_buffer,
lte_frame_parms,
PHY_vars_eNb->dlsch_eNb[0]);
#ifdef OUTPUT_DEBUG
for (s=0;s<PHY_vars_eNb->dlsch_eNb[0]->harq_processes[0]->C;s++) {
if (s<PHY_vars_eNb->dlsch_eNb[0]->harq_processes[0]->Cminus)
Kr = PHY_vars_eNb->dlsch_eNb[0]->harq_processes[0]->Kminus;
else
Kr = PHY_vars_eNb->dlsch_eNb[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[0]->harq_processes[0]->c[s][i]);
}
#endif
re_allocated = dlsch_modulation(PHY_vars_eNb->lte_eNB_common_vars.txdataF[eNb_id],
1024,
0,
&PHY_vars_eNb->lte_frame_parms,
PHY_vars_eNb->dlsch_eNb[0]);
printf("RB count %d (%d,%d)\n",re_allocated,re_allocated/lte_frame_parms->num_dlsch_symbols/12,lte_frame_parms->num_dlsch_symbols);
if (num_layers>1)
re_allocated = dlsch_modulation(PHY_vars_eNb->lte_eNB_common_vars.txdataF[eNb_id],
1024,
0,
&PHY_vars_eNb->lte_frame_parms,
PHY_vars_eNb->dlsch_eNb[1]);
}
int main(int argc, char **argv)
{
char c;
int i,l,aa;
double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
uint8_t snr1set=0;
//mod_sym_t **txdataF;
int **txdata,**txdata1,**txdata2;
double **s_re,**s_im,**s_re1,**s_im1,**s_re2,**s_im2,**r_re,**r_im,**r_re1,**r_im1,**r_re2,**r_im2;
double iqim = 0.0;
unsigned char pbch_pdu[6];
// int sync_pos, sync_pos_slot;
// FILE *rx_frame_file;
FILE *output_fd;
uint8_t write_output_file=0;
int result;
int freq_offset;
// int subframe_offset;
// char fname[40], vname[40];
int trial, n_trials, ntrials=1, n_errors,n_errors2,n_alamouti;
uint8_t transmission_mode = 1,n_tx=1,n_rx=1;
uint16_t Nid_cell=0;
int n_frames=1;
channel_desc_t *eNB2UE,*eNB2UE1,*eNB2UE2;
uint32_t nsymb,tx_lev,tx_lev1,tx_lev2;
uint8_t extended_prefix_flag=0;
LTE_DL_FRAME_PARMS *frame_parms;
#ifdef EMOS
fifo_dump_emos emos_dump;
#endif
FILE *input_fd=NULL,*pbch_file_fd=NULL;
char input_val_str[50],input_val_str2[50];
// double input_val1,input_val2;
// uint16_t amask=0;
uint8_t frame_mod4,num_pdcch_symbols;
uint16_t NB_RB=25;
SCM_t channel_model=AWGN;//Rayleigh1_anticorr;
DCI_ALLOC_t dci_alloc[8];
uint8_t abstraction_flag=0;//,calibration_flag=0;
int pbch_tx_ant;
uint8_t N_RB_DL=100,osf=1;
unsigned char frame_type = FDD;
unsigned char pbch_phase = 0;
#ifdef XFORMS
FD_lte_phy_scope_ue *form_ue;
char title[255];
#endif
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, "f:hpf:g:n:s:S:t:x:y:z:N:F:GdP:")) != -1) {
switch (c) {
case 'f':
write_output_file=1;
output_fd = fopen(optarg,"w");
if (output_fd==NULL) {
printf("Error opening %s\n",optarg);
exit(-1);
}
break;
case 'd':
frame_type = TDD;
break;
case 'g':
switch((char)*optarg) {
case 'A':
channel_model=SCM_A;
break;
case 'B':
channel_model=SCM_B;
break;
case 'C':
channel_model=SCM_C;
break;
case 'D':
channel_model=SCM_D;
break;
case 'E':
channel_model=EPA;
break;
case 'F':
channel_model=EVA;
break;
case 'G':
channel_model=ETU;
break;
default:
msg("Unsupported channel model!\n");
exit(-1);
}
break;
case '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 't':
Td= atof(optarg);
break;
*/
case 'p':
extended_prefix_flag=1;
break;
/*
case 'r':
ricean_factor = pow(10,-.1*atof(optarg));
if (ricean_factor>1) {
printf("Ricean factor must be between 0 and 1\n");
exit(-1);
}
break;
*/
case 'x':
transmission_mode=atoi(optarg);
if ((transmission_mode!=1) &&
(transmission_mode!=2) &&
(transmission_mode!=6)) {
msg("Unsupported transmission mode %d\n",transmission_mode);
exit(-1);
}
break;
case 'y':
n_tx=atoi(optarg);
if ((n_tx==0) || (n_tx>2)) {
msg("Unsupported number of tx antennas %d\n",n_tx);
exit(-1);
}
break;
case 'z':
n_rx=atoi(optarg);
if ((n_rx==0) || (n_rx>2)) {
msg("Unsupported number of rx antennas %d\n",n_rx);
exit(-1);
}
break;
case 'A':
abstraction_flag=1;
ntrials=10000;
msg("Running Abstraction test\n");
pbch_file_fd=fopen(optarg,"r");
if (pbch_file_fd==NULL) {
printf("Problem with filename %s\n",optarg);
exit(-1);
}
break;
// case 'C':
// calibration_flag=1;
// msg("Running Abstraction calibration for Bias removal\n");
// break;
case 'N':
Nid_cell = atoi(optarg);
break;
case 'F':
input_fd = fopen(optarg,"r");
if (input_fd==NULL) {
printf("Problem with filename %s\n",optarg);
exit(-1);
}
break;
case 'P':
pbch_phase = atoi(optarg);
if (pbch_phase>3)
printf("Illegal PBCH phase (0-3) got %d\n",pbch_phase);
break;
default:
case 'h':
printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -N CellId\n",
argv[0]);
printf("-h This message\n");
printf("-p Use extended prefix mode\n");
printf("-d Use TDD\n");
printf("-n Number of frames to simulate\n");
printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB. If n_frames is 1 then just SNR is simulated\n");
printf("-S Ending SNR, runs from SNR0 to SNR1\n");
printf("-t Delay spread for multipath channel\n");
printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n");
printf("-x Transmission mode (1,2,6 for the moment)\n");
printf("-y Number of TX antennas used in eNB\n");
printf("-z Number of RX antennas used in UE\n");
printf("-N Nid_cell\n");
printf("-f Output filename (.txt format) for Pe/SNR results\n");
printf("-F Input filename (.txt format) for RX conformance testing\n");
exit (-1);
break;
}
}
if (transmission_mode>=2)
n_tx=2;
lte_param_init(n_tx,n_rx,transmission_mode,extended_prefix_flag,frame_type,Nid_cell,N_RB_DL,osf);
#ifdef XFORMS
fl_initialize (&argc, argv, NULL, 0, 0);
form_ue = create_lte_phy_scope_ue();
sprintf (title, "LTE PHY SCOPE UE");
fl_show_form (form_ue->lte_phy_scope_ue, FL_PLACE_HOTSPOT, FL_FULLBORDER, title);
#endif
if (snr1set==0) {
if (n_frames==1)
snr1 = snr0+.1;
else
snr1 = snr0+5.0;
}
printf("SNR0 %f, SNR1 %f\n",snr0,snr1);
frame_parms = &PHY_vars_eNb->lte_frame_parms;
txdata = PHY_vars_eNb->lte_eNB_common_vars.txdata[0];
txdata1 = PHY_vars_eNb1->lte_eNB_common_vars.txdata[0];
txdata2 = PHY_vars_eNb2->lte_eNB_common_vars.txdata[0];
s_re = malloc(2*sizeof(double*));
s_im = malloc(2*sizeof(double*));
s_re1 = malloc(2*sizeof(double*));
s_im1 = malloc(2*sizeof(double*));
s_re2 = malloc(2*sizeof(double*));
s_im2 = malloc(2*sizeof(double*));
r_re = malloc(2*sizeof(double*));
r_im = malloc(2*sizeof(double*));
r_re1 = malloc(2*sizeof(double*));
r_im1 = malloc(2*sizeof(double*));
r_re2 = malloc(2*sizeof(double*));
r_im2 = 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);
printf("PHY_vars_eNb1->lte_eNB_common_vars.txdataF[0][0] = %p\n",
PHY_vars_eNb1->lte_eNB_common_vars.txdataF[0][0]);
DLSCH_alloc_pdu2.rah = 0;
DLSCH_alloc_pdu2.rballoc = DLSCH_RB_ALLOC;
DLSCH_alloc_pdu2.TPC = 0;
DLSCH_alloc_pdu2.dai = 0;
DLSCH_alloc_pdu2.harq_pid = 0;
DLSCH_alloc_pdu2.tb_swap = 0;
DLSCH_alloc_pdu2.mcs1 = 0;
DLSCH_alloc_pdu2.ndi1 = 1;
DLSCH_alloc_pdu2.rv1 = 0;
// Forget second codeword
DLSCH_alloc_pdu2.tpmi = (transmission_mode==6 ? 5 : 0) ; // precoding
eNB2UE = new_channel_desc_scm(PHY_vars_eNb->lte_frame_parms.nb_antennas_tx,
PHY_vars_UE->lte_frame_parms.nb_antennas_rx,
channel_model,
BW,
0,
0,
0);
if (eNB2UE==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));
s_re1[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_re1[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_im1[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_im1[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_re2[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_re2[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
s_im2[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(s_im2[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));
r_re1[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_re1[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_im1[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_im1[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_re2[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_re2[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
r_im2[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
bzero(r_im2[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
}
pbch_pdu[0]=100;
pbch_pdu[1]=1;
pbch_pdu[2]=0;
if (PHY_vars_eNb->lte_frame_parms.frame_type == FDD) {
generate_pss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
(PHY_vars_eNb->lte_frame_parms.Ncp==NORMAL) ? 6 : 5,
0);
/*
generate_sss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
(PHY_vars_eNb->lte_frame_parms.Ncp==0) ? 5 : 4,
0);*/
generate_pss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
(PHY_vars_eNb->lte_frame_parms.Ncp==0) ? 6 : 5,
10);
/*
generate_sss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
(PHY_vars_eNb->lte_frame_parms.Ncp==0) ? 5 : 4,
10);
*/
} else {
generate_sss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
(PHY_vars_eNb->lte_frame_parms.Ncp==0) ? 6 : 5,
1);
generate_pss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
2,
2);
generate_sss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
(PHY_vars_eNb->lte_frame_parms.Ncp==0) ? 6 : 5,
11);
generate_pss(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
2,
12);
}
/*
generate_pilots(PHY_vars_eNb,
PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
LTE_NUMBER_OF_SUBFRAMES_PER_FRAME);
num_pdcch_symbols = generate_dci_top(1,
0,
dci_alloc,
0,
1024,
&PHY_vars_eNb->lte_frame_parms,
PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
0);
*/
/*
if (num_pdcch_symbols<3) {
printf("Less than 3 pdcch symbols\n");
// exit(-1);
}
if (pbch_phase>0) {
dummybuf[0] = dummy0;
dummybuf[1] = dummy1;
dummybuf[2] = dummy2;
dummybuf[3] = dummy3;
generate_pbch(&PHY_vars_eNb->lte_eNB_pbch,
(mod_sym_t**)dummybuf,
AMP,
&PHY_vars_eNb->lte_frame_parms,
pbch_pdu,
0);
}
generate_pbch(&PHY_vars_eNb->lte_eNB_pbch,
PHY_vars_eNb->lte_eNB_common_vars.txdataF[0],
AMP,
&PHY_vars_eNb->lte_frame_parms,
pbch_pdu,
pbch_phase);
*/
write_output("txsigF0.m","txsF0", PHY_vars_eNb->lte_eNB_common_vars.txdataF[0][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[0][1],FRAME_LENGTH_COMPLEX_SAMPLES_NO_PREFIX,1,1);
tx_lev = 0;
tx_lev1 = 0;
tx_lev2 = 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[0][aa], // input,
txdata[aa], // output
frame_parms->log2_symbol_size, // log2_fft_size
LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*nsymb, // number of symbols
frame_parms->nb_prefix_samples, // number of prefix samples
CYCLIC_PREFIX);
else {
normal_prefix_mod(PHY_vars_eNb->lte_eNB_common_vars.txdataF[0][aa],
txdata[aa],
LTE_NUMBER_OF_SUBFRAMES_PER_FRAME*nsymb,
frame_parms);
}
tx_lev += signal_energy(&txdata[aa][frame_parms->samples_per_tti/2],
OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
}
write_output("txsig0.m","txs0", txdata[0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
if (frame_parms->nb_antennas_tx>1)
write_output("txsig1.m","txs1", txdata[1],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
// multipath channel
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++) {
s_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
s_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
}
}
for (SNR=snr0; SNR<snr1; SNR+=.2) {
n_errors = 0;
n_errors2 = 0;
n_alamouti = 0;
for (trial=0; trial<n_frames; trial++) {
multipath_channel(eNB2UE,s_re,s_im,r_re,r_im,
2*nsymb*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,0);
sigma2_dB = 10*log10((double)tx_lev) +10*log10((double)PHY_vars_eNb->lte_frame_parms.ofdm_symbol_size/(double)(12*NB_RB)) - SNR;
if (n_frames==1)
printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f,%f,%f\n",sigma2_dB,SNR,
10*log10((double)tx_lev),
10*log10((double)tx_lev1),
10*log10((double)tx_lev2));
//AWGN
sigma2 = pow(10,sigma2_dB/10);
/*
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 (n_trials=0; n_trials<ntrials; n_trials++) {
//printf("n_trial %d\n",n_trials);
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++) {
((short*) PHY_vars_UE->lte_ue_common_vars.rxdata[aa])[2*i] = (short) ((r_re[aa][i] +sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
((short*) PHY_vars_UE->lte_ue_common_vars.rxdata[aa])[2*i+1] = (short) ((r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
}
}
lte_sync_timefreq(PHY_vars_UE,0,2680000000);
if (n_frames==1) {
printf("rx_level data symbol %f\n",
10*log10(signal_energy(&PHY_vars_UE->lte_ue_common_vars.rxdata[0][frame_parms->samples_per_tti/2],4*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES)));
}
} //noise trials
} // trials
if (abstraction_flag==0) {
printf("SNR %f : n_errors2 = %d/%d (BLER %e,40ms BLER %e,%d,%d), n_alamouti %d\n", SNR,n_errors2,ntrials*(1+trial),(double)n_errors2/(ntrials*(1+trial)),pow((double)n_errors2/(ntrials*(1+trial)),4),
ntrials,trial,n_alamouti);
if (write_output_file==1)
fprintf(output_fd,"%f %e\n",SNR,(double)n_errors2/(ntrials*(1+trial)));
}
} // NSR
if (n_frames==1) {
}
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();
if (write_output_file)
fclose(output_fd);
return(n_errors);
}
