void rf_rx_simple(double **r_re,
double **r_im,
unsigned int nb_rx_antennas,
unsigned int length,
double s_time,
double rx_gain_dB)
{
int i,a;
double rx_gain_lin = pow(10.0,.05*rx_gain_dB);
//double rx_gain_lin = 1.0;
double N0W = pow(10.0,.1*(-174.0 - 10*log10(s_time*1e-9)));
//double N0W = 0.0;
// printf("s_time=%f, N0W=%g\n",s_time,10*log10(N0W));
//Loop over input
#ifdef DEBUG_RF
printf("N0W = %f dBm\n",10*log10(N0W));
printf("rx_gain = %f dB(%f)\n",rx_gain_dB,rx_gain_lin);
#endif
for (i=0; i<length; i++) {
for (a=0; a<nb_rx_antennas; a++) {
// Amplify by receiver gain and apply 3rd order non-linearity
r_re[a][i] = rx_gain_lin*(r_re[a][i] + sqrt(.5*N0W)*gaussdouble(0.0,1.0));
r_im[a][i] = rx_gain_lin*(r_im[a][i] + sqrt(.5*N0W)*gaussdouble(0.0,1.0));
}
}
}
int test_logmap8(LTE_eNB_DLSCH_t *dlsch_eNB,
LTE_UE_DLSCH_t *dlsch_ue,
unsigned int coded_bits,
unsigned char NB_RB,
double sigma,
unsigned char qbits,
unsigned int block_length,
unsigned int ntrials,
unsigned int *errors,
unsigned int *trials,
unsigned int *uerrors,
unsigned int *crc_misses,
unsigned int *iterations,
unsigned int num_pdcch_symbols,
unsigned int subframe)
{
unsigned char test_input[block_length+1];
short *channel_output;
unsigned char decoded_output[block_length];
unsigned int i,trial=0;
unsigned int crc=0;
unsigned char ret;
unsigned char uerr;
unsigned char crc_type;
channel_output = (short *)malloc(coded_bits*sizeof(short));
*iterations=0;
*errors=0;
*crc_misses=0;
*uerrors=0;
// printf("dlsch_eNB->TBS= %d, block_length %d\n",dlsch_eNB->harq_processes[0]->TBS,block_length);
while (trial++ < ntrials) {
// printf("encoding\n");
// test_input[0] = 0x80;
for (i=0; i<block_length; i++) {
test_input[i] = i&0xff;//(unsigned char)(taus()&0xff);
}
dlsch_encoding(test_input,
&PHY_vars_eNB->lte_frame_parms,
num_pdcch_symbols,
PHY_vars_eNB->dlsch_eNB[0][0],
0,
subframe,
&PHY_vars_eNB->dlsch_rate_matching_stats,
&PHY_vars_eNB->dlsch_turbo_encoding_stats,
&PHY_vars_eNB->dlsch_interleaving_stats);
uerr=0;
for (i = 0; i < coded_bits; i++) {
#ifdef DEBUG_CODER
if ((i&0xf)==0)
printf("\ne %d..%d: ",i,i+15);
printf("%d.",PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->e[i]);
#endif
channel_output[i] = (short)quantize(sigma/4.0,(2.0*PHY_vars_eNB->dlsch_eNB[0][0]->harq_processes[0]->e[i]) - 1.0 + sigma*gaussdouble(0.0,1.0),qbits);
// printf("input %d, output %f\n",(2*PHY_vars_eNB->dlsch_eNB[0][0]->e[i]) - 1,
// (2.0*PHY_vars_eNB->dlsch_eNB[0][0]->e[i]) - 1.0 + sigma*gaussdouble(0.0,1.0));
}
#ifdef DEBUG_CODER
printf("\n");
exit(-1);
#endif
PHY_vars_UE->dlsch_ue[0][0]->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->G = coded_bits;
ret = dlsch_decoding(PHY_vars_UE,
channel_output,
&PHY_vars_UE->lte_frame_parms,
PHY_vars_UE->dlsch_ue[0][0],
PHY_vars_UE->dlsch_ue[0][0]->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid],
subframe,
PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid,
num_pdcch_symbols,1);
/* int diffs = 0,puncts=0;
for (i=0;i<dlsch_ue->harq_processes[0]->Kplus*3;i++) {
if (dlsch_ue->harq_processes[0]->d[0][96+i] == 0) {
printf("%d punct (%d,%d)\n",i,dlsch_ue->harq_processes[0]->d[0][96+i],dlsch_eNb->harq_processes[0]->d[0][96+i]);
puncts++;
}
else if (sgn(dlsch_ue->harq_processes[0]->d[0][96+i]) != dlsch_eNb->harq_processes[0]->d[0][96+i]) {
printf("%d differs (%d,%d)\n",i,dlsch_ue->harq_processes[0]->d[0][96+i],dlsch_eNb->harq_processes[0]->d[0][96+i]);
diffs++;
}
else
printf("%d same (%d,%d)\n",i,dlsch_ue->harq_processes[0]->d[0][96+i],dlsch_eNb->harq_processes[0]->d[0][96+i]);
}
printf("diffs %d puncts %d(%d,%d,%d,%d,%d)\n",diffs,puncts,dlsch_ue->harq_processes[0]->F,coded_bits,3*(block_length<<3),3*dlsch_ue->harq_processes[0]->Kplus,3*dlsch_ue->harq_processes[0]->F+3*(block_length<<3)-coded_bits);
printf("ret %d (max %d)\n",ret,dlsch_ue->max_turbo_iterations);
printf("trial %d : i %d/%d : Input %x, Output %x (%x, F %d)\n",trial,0,block_length,test_input[0],
dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->b[0],
dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->c[0][0],
(dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->F>>3));
*/
if (ret < dlsch_ue->max_turbo_iterations+1) {
*iterations = (*iterations) + ret;
// if (ret>1)
// printf("ret %d\n",ret);
} else
*iterations = (*iterations) + (ret-1);
if (uerr==1)
*uerrors = (*uerrors) + 1;
for (i=0; i<block_length; i++) {
if (dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->c[0][i] != test_input[i]) {
/*
printf("i %d/%d : Input %x, Output %x (%x, F %d)\n",i,block_length,test_input[i],
dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->b[i],
dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->c[0][i],
(dlsch_ue->harq_processes[PHY_vars_UE->dlsch_ue[0][0]->current_harq_pid]->F>>3));
*/
*errors = (*errors) + 1;
// printf("*%d, ret %d\n",*errors,ret);
if (ret < dlsch_ue->max_turbo_iterations+1)
*crc_misses = (*crc_misses)+1;
break;
}
}
if (ret == dlsch_ue->max_turbo_iterations+1) {
// exit(-1);
}
/*
else {
for (i=0;i<block_length;i++) {
if (dlsch_ue->harq_processes[0]->b[i] != test_input[i]) {
printf("i %d/%d : Input %x, Output %x (%x, F %d)\n",i,block_length,test_input[i],
dlsch_ue->harq_processes[0]->b[i],
dlsch_ue->harq_processes[0]->c[0][i],
(dlsch_ue->harq_processes[0]->F>>3));
}
}
}*/
if (*errors == 100) {
printf("trials %d\n",trial);
break;
}
}
*trials = trial;
// printf("lte: trials %d, errors %d\n",trial,*errors);
return(0);
}
//free(input_data);
void rf_rx(double **r_re,
double **r_im,
double **r_re_i1,
double **r_im_i1,
double I0_dB,
unsigned int nb_rx_antennas,
unsigned int length,
double s_time,
double f_off,
double drift,
double noise_figure,
double rx_gain_dB,
int IP3_dBm,
double *initial_phase,
double pn_cutoff,
double pn_amp_dBc,
double IQ_imb_dB,
double IQ_phase)
{
double phase = *initial_phase;
double phase2 = *initial_phase;
double phase_inc = 2*M_PI*f_off*s_time*1e-9;
double IQ_imb_lin = pow(10.0,-.05*IQ_imb_dB);
double rx_gain_lin = pow(10.0,.05*rx_gain_dB);
double IP3_lin = pow(10.0,-.1*IP3_dBm);
double p_noise = 0.0;
double tmp_re,tmp_im;
double N0W = pow(10.0,.1*(-174.0 - 10*log10(s_time*1e-9)));
// printf("s_time=%f, N0W=%g\n",s_time,10*log10(N0W));
// phase-noise filter coefficients (2nd order digital Butterworth)
double pn_cutoff_d = tan(M_PI*s_time*1e-9*pn_cutoff);
double pn_c = 1+2*cos(M_PI/4)*pn_cutoff_d + (pn_cutoff_d*pn_cutoff_d);
double pn_a0 = pn_cutoff_d*pn_cutoff_d/pn_c;
double pn_b1 = 2*((pn_cutoff_d*pn_cutoff_d) - 1)/pn_c;
double pn_b2 = (4*pn_a0) - pn_b1 - 1;
double x_n=0.0,x_n1=0.0,x_n2=0.0,y_n1=0.0,y_n2=0.0;
double pn_amp = pow(10.0,.1*pn_amp_dBc);
double I0 = pow(10.0,.05*I0_dB);
// double dummy;
int i,a,have_interference=0;
if (pn_amp_dBc > -20.0) {
printf("rf.c: Illegal pn_amp_dBc %f\n",pn_amp_dBc);
exit(-1);
}
if ((pn_cutoff > 1e6) || (pn_cutoff<1e3)) {
printf("rf.c: Illegal pn_cutoff %f\n",pn_cutoff);
exit(-1);
}
if (fabs(IQ_imb_dB) > 1.0) {
printf("rf.c: Illegal IQ_imb %f\n",IQ_imb_dB);
exit(-1);
}
if (fabs(IQ_phase) > 0.1) {
printf("rf.c: Illegal IQ_phase %f\n",IQ_phase);
exit(-1);
}
if (fabs(f_off) > 10000.0) {
printf("rf.c: Illegal f_off %f\n",f_off);
exit(-1);
}
if (fabs(drift) > 1000.0) {
printf("rf.c: Illegal drift %f\n",drift);
exit(-1);
}
#ifdef DEBUG_RF
printf("pn_a0 = %f, pn_b1=%f,pn_b2=%f\n",pn_a0,pn_b1,pn_b2);
#endif
/*
for (i=0;i<nb_rx_antennas;i++)
if (noise_figure[i] < 1.0) {
printf("rf.c: Illegal noise_figure %d %f\n",i,noise_figure[i]);
exit(-1);
}
*/
//Loop over input
#ifdef DEBUG_RF
printf("N0W = %f dBm\n",10*log10(N0W));
printf("rx_gain = %f dB(%f)\n",rx_gain_dB,rx_gain_lin);
printf("IQ_imb = %f dB(%f)\n",IQ_imb_dB,IQ_imb_lin);
#endif
p_noise=0.0;
if ((r_re_i1) && (r_im_i1) )
have_interference=1;
for (i=0; i<length; i++) {
for (a=0; a<nb_rx_antennas; a++) {
if (have_interference==1) {
r_re[a][i] = r_re[a][i] + (I0 * r_re_i1[a][i]);
r_im[a][i] = r_im[a][i] + (I0 * r_im_i1[a][i]);
}
// Amplify by receiver gain and apply 3rd order non-linearity
r_re[a][i] = rx_gain_lin*(r_re[a][i] + IP3_lin*(pow(r_re[a][i],3.0) + 3.0*r_re[a][i]*r_im[a][i]*r_im[a][i])) + rx_gain_lin*(sqrt(.5*N0W)*gaussdouble(0.0,1.0));
r_im[a][i] = rx_gain_lin*(r_im[a][i] + IP3_lin*(pow(r_im[a][i],3.0) + 3.0*r_im[a][i]*r_re[a][i]*r_re[a][i])) + rx_gain_lin*(sqrt(.5*N0W)*gaussdouble(0.0,1.0));
// Apply phase offsets
tmp_re = r_re[a][i]*cos(phase2) - r_im[a][i]*sin(phase2);
tmp_im = IQ_imb_lin*(r_re[a][i]*sin(phase2+IQ_phase) + r_im[a][i]*cos(phase2+IQ_phase));
r_re[a][i] = tmp_re;
r_im[a][i] = tmp_im;
}
// if (nb_rx_antennas == 1) {
// dummy = gaussdouble(0.0,1.0);
// dummy = gaussdouble(0.0,1.0);
// }
// First apply frequency/phase offsets + phase noise
// U[i%pn_len]=uniformrandom()*pn_amp_lin;
// p_noise = 0;
// for (j=0;j<pn_len;j++)
// p_noise += h_pn[j] * U[(i-j)%pn_len];
// recompute phase offsets for next sample
phase += phase_inc;
phase2 = phase + sqrt(pn_amp)*p_noise;
// printf("phase = %f, phase2=%f\n",phase,phase2);
//*initial_phase = phase2;
//compute next realization of phase-noise process
x_n2 = x_n1;
x_n1 = x_n;
x_n = gaussdouble(0.0,1.0);
y_n1 = p_noise;
y_n2 = y_n1;
p_noise = pn_a0*x_n + 2*pn_a0*x_n1 + pn_a0*x_n2 - pn_b1*y_n1 - pn_b2*y_n2;
// pn[i] = p_noise;
}
}
int main(int argc, char **argv) {
char c;
int i,aa,aarx;
double sigma2, sigma2_dB=0,SNR,snr0=10.0,snr1=10.2;
int snr1set=0;
uint32_t *txdata,*rxdata[2];
double *s_re[2],*s_im[2],*r_re[2],*r_im[2];
double iqim=0.0;
int trial, ntrials=1;
int n_rx=1;
int awgn_flag=0;
int n_frames=1;
channel_desc_t *ch;
uint32_t tx_lev,tx_lev_dB;
int interf1=-19,interf2=-19;
SCM_t channel_model=AWGN;
uint32_t sdu_length_samples;
TX_VECTOR_t tx_vector;
int errors=0,misdetected_errors=0,signal_errors=0;
int symbols=0;
int tx_offset = 0,rx_offset;
RX_VECTOR_t *rxv;
uint8_t *data_ind,*data_ind_rx;
int no_detection=1;
int missed_packets=0;
uint8_t rxp;
int off,off2;
double txg,txg_dB;
int log2_maxh;
double snr_array[100];
int errors_array[100];
int trials_array[100];
int misdetected_errors_array[100];
int signal_errors_array[100];
int missed_packets_array[100];
int cnt=0;
char fname[100],vname[100];
int stop=0;
data_ind = (uint8_t*)malloc(4095+2+1);
data_ind_rx = (uint8_t*)malloc(4095+2+1);
tx_vector.rate=1;
tx_vector.sdu_length=256;
tx_vector.service=0;
logInit();
randominit(0);
set_taus_seed(0);
// Basic initializations
init_fft(64,6,rev64);
init_interleavers();
ccodedot11_init();
ccodedot11_init_inv();
phy_generate_viterbi_tables();
init_crc32();
data_ind[0] = 0;
data_ind[1] = 0;
tx_offset = taus()%(FRAME_LENGTH_SAMPLES_MAX/2);
while ((c = getopt (argc, argv, "hag:n:s:S:z:r:p:d:")) != -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:
printf("Unsupported channel model!\n");
exit(-1);
}
break;
case 'd':
tx_offset = atoi(optarg);
break;
case 'p':
tx_vector.sdu_length = atoi(optarg);
if (atoi(optarg)>4095) {
printf("Illegal sdu_length %d\n",tx_vector.sdu_length);
exit(-1);
}
break;
case 'r':
tx_vector.rate = atoi(optarg);
if (atoi(optarg)>7) {
printf("Illegal rate %d\n",tx_vector.rate);
exit(-1);
}
break;
case 'n':
n_frames = atoi(optarg);
break;
case 's':
snr0 = atof(optarg);
printf("Setting SNR0 to %f\n",snr0);
break;
case 'S':
snr1 = atof(optarg);
snr1set=1;
printf("Setting SNR1 to %f\n",snr1);
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;
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("-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] 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("-z Number of RX antennas used\n");
printf("-F Input filename (.txt format) for RX conformance testing\n");
exit (-1);
break;
}
}
if (n_frames==1)
snr1 = snr0+.2;
else
snr1 = snr0+5;
for (i=0; i<tx_vector.sdu_length; i++)
data_ind[i+2] = i;//taus(); // randomize packet
data_ind[tx_vector.sdu_length+2+4]=0; // Tail byte
// compute number of OFDM symbols in DATA period
symbols = ((4+2+1+tx_vector.sdu_length)<<1) / nibbles_per_symbol[tx_vector.rate];
if ((((4+2+1+tx_vector.sdu_length)<<1) % nibbles_per_symbol[tx_vector.rate]) > 0)
symbols++;
sdu_length_samples = (symbols + 5) * 80;
printf("Number of symbols for sdu : %d, samples %d\n",symbols,sdu_length_samples);
txdata = (uint32_t*)memalign(16,sdu_length_samples*sizeof(uint32_t));
for (i=0; i<n_rx; i++) {
rxdata[i] = (uint32_t*)memalign(16,(FRAME_LENGTH_SAMPLES_MAX+1280)*sizeof(uint32_t));
bzero(rxdata[i],(FRAME_LENGTH_SAMPLES_MAX+1280)*sizeof(uint32_t));
}
s_re[0] = (double *)malloc(sdu_length_samples*sizeof(double));
bzero(s_re[0],sdu_length_samples*sizeof(double));
s_im[0] = (double *)malloc(sdu_length_samples*sizeof(double));
bzero(s_im[0],sdu_length_samples*sizeof(double));
for (i=0; i<n_rx; i++) {
r_re[i] = (double *)malloc((sdu_length_samples+100)*sizeof(double));
bzero(r_re[i],(sdu_length_samples+100)*sizeof(double));
r_im[i] = (double *)malloc((sdu_length_samples+100)*sizeof(double));
bzero(r_im[i],(sdu_length_samples+100)*sizeof(double));
}
ch = new_channel_desc_scm(1,
n_rx,
channel_model,
BW,
0.0,
0,
0);
if (ch==NULL) {
printf("Problem generating channel model. Exiting.\n");
exit(-1);
}
phy_tx_start(&tx_vector,txdata,0,FRAME_LENGTH_SAMPLES_MAX,data_ind);
tx_lev = signal_energy((int32_t*)txdata,320);
tx_lev_dB = (unsigned int) dB_fixed(tx_lev);
write_output("txsig0.m","txs", txdata,sdu_length_samples,1,1);
// multipath channel
for (i=0; i<sdu_length_samples; i++) {
s_re[0][i] = (double)(((short *)txdata)[(i<<1)]);
s_im[0][i] = (double)(((short *)txdata)[(i<<1)+1]);
}
for (SNR=snr0; SNR<snr1; SNR+=.2) {
printf("n_frames %d SNR %f sdu_length %d rate %d\n",n_frames,SNR,tx_vector.sdu_length,tx_vector.rate);
errors=0;
misdetected_errors=0;
signal_errors=0;
missed_packets=0;
stop=0;
for (trial=0; trial<n_frames; trial++) {
// printf("Trial %d (errors %d), sdu_length_samples %d\n",trial,errors,sdu_length_samples);
sigma2_dB = 25; //10*log10((double)tx_lev) - SNR;
txg_dB = 10*log10((double)tx_lev) - (SNR + sigma2_dB);
txg = pow(10.0,-.05*txg_dB);
if (n_frames==1)
printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f, txg %f\n",sigma2_dB,SNR,10*log10((double)tx_lev)-txg_dB,txg_dB);
//AWGN
sigma2 = pow(10,sigma2_dB/10);
// printf("Sigma2 %f (sigma2_dB %f)\n",sigma2,sigma2_dB);
// sigma2 = 0;
multipath_channel(ch,s_re,s_im,r_re,r_im,
sdu_length_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,1,80,0)),
10*log10(tx_lev));
}
for (aa=0; aa<n_rx; aa++) {
for (i=0; i<(sdu_length_samples+100); i++) {
((short*)&rxdata[aa][tx_offset])[(i<<1)] = (short) (((txg*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
((short*)&rxdata[aa][tx_offset])[1+(i<<1)] = (short) (((txg*r_im[aa][i]) + (iqim*r_re[aa][i]*txg) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
// if (i<128)
// printf("i%d : rxdata %d, txdata %d\n",i,((short *)rxdata[aa])[rx_offset+(i<<1)],((short *)txdata)[i<<1]);
}
for (i=0; i<tx_offset; i++) {
((short*) rxdata[aa])[(i<<1)] = (short) (sqrt(sigma2/2)*gaussdouble(0.0,1.0));
((short*) rxdata[aa])[1+(i<<1)] = (short) (sqrt(sigma2/2)*gaussdouble(0.0,1.0));
}
for (i=(tx_offset+sdu_length_samples+100); i<FRAME_LENGTH_SAMPLES_MAX; i++) {
((short*) rxdata[aa])[(i<<1)] = (short) (sqrt(sigma2/2)*gaussdouble(0.0,1.0));
((short*) rxdata[aa])[1+(i<<1)] = (short) (sqrt(sigma2/2)*gaussdouble(0.0,1.0));
}
}
if (n_frames==1) {
write_output("rxsig0.m","rxs", &rxdata[0][0],FRAME_LENGTH_SAMPLES_MAX,1,1);
}
no_detection=1;
off = 0;
while(off<FRAME_LENGTH_SAMPLES_MAX) {
rxp = dB_fixed(signal_energy(rxdata[0]+off,512));
if (n_frames==1)
printf("off %d: rxp %d (%d)\n",off,rxp,signal_energy(rxdata[0]+off,104));
if (rxp>RX_THRES_dB) {
if (off<105)
off2 = FRAME_LENGTH_SAMPLES_MAX-105;
else
off2=off;
if ((initial_sync(&rxv,&rx_offset,&log2_maxh,(uint32_t*)rxdata[0],FRAME_LENGTH_SAMPLES_MAX,off2,1) == BUSY)) {
if (n_frames==1)
printf("Channel is busy, rxv %p, offset %d\n",(void*)rxv,rx_offset);
no_detection=0;
if (rxv) {
if (n_frames==1)
printf("Rate %d, SDU_LENGTH %d\n",rxv->rate,rxv->sdu_length);
if ( (rxv->rate != tx_vector.rate)||(rxv->sdu_length != tx_vector.sdu_length)) {
signal_errors++;
if ((signal_errors > (n_frames/10)) && (trial>=100)) {
stop=1;
}
if (n_frames == 1)
printf("SIGNAL error: rx_offset %d, tx_offset %d (off2 %d)\n",rx_offset,tx_offset,off2);
break;
}
else {
memset(data_ind_rx,0,rxv->sdu_length+4+2+1);
if (data_detection(rxv,data_ind_rx,(uint32_t*)rxdata[0],FRAME_LENGTH_SAMPLES_MAX,rx_offset,log2_maxh,NULL)) {
for (i=0; i<rxv->sdu_length+6; i++) {
if (data_ind[i]!=data_ind_rx[i]) {
//printf("error position %d : %x,%x\n",i,data_ind[i],data_ind_rx[i]);
misdetected_errors++;
errors++;
}
}
if ((errors > (n_frames/10)) && (trial>100)) {
stop=1;
break;
}
} // initial_synch returns IDLE
else {
errors++;
if (n_frames == 1) {
printf("Running data_detection fails\n");
for (i=0; i<rxv->sdu_length+6; i++) {
if (data_ind[i]!=data_ind_rx[i]) {
printf("error position %d : %x,%x\n",i,data_ind[i],data_ind_rx[i]);
}
}
}
if ((errors > (n_frames/10)) && (trial>=100)) {
stop=1;
break;
}
}
break;
}
}
}
}
off+=105;
}
if (no_detection==1)
missed_packets++;
if (stop==1)
break;
}
printf("\nSNR %f dB: errors %d/%d, misdetected errors %d/%d,signal_errors %d/%d, missed_packets %d/%d\n",SNR,errors,trial-signal_errors,misdetected_errors,trial-signal_errors,signal_errors,trial,missed_packets,trial);
snr_array[cnt] = SNR;
errors_array[cnt] = errors;
trials_array[cnt] = trial;
misdetected_errors_array[cnt] = misdetected_errors;
signal_errors_array[cnt] = signal_errors;
missed_packets_array[cnt] = missed_packets;
cnt++;
if (cnt>99) {
printf("too many SNR points, exiting ...\n");
break;
}
if (errors == 0)
break;
#ifdef EXECTIME
print_is_stats();
print_dd_stats();
#endif
}
sprintf(fname,"SNR_%d_%d.m",tx_vector.rate,tx_vector.sdu_length);
sprintf(vname,"SNR_%d_%d_v",tx_vector.rate,tx_vector.sdu_length);
write_output(fname,vname,snr_array,cnt,1,7);
sprintf(fname,"errors_%d_%d.m",tx_vector.rate,tx_vector.sdu_length);
sprintf(vname,"errors_%d_%d_v",tx_vector.rate,tx_vector.sdu_length);
write_output(fname,vname,errors_array,cnt,1,2);
sprintf(fname,"trials_%d_%d.m",tx_vector.rate,tx_vector.sdu_length);
sprintf(vname,"trials_%d_%d_v",tx_vector.rate,tx_vector.sdu_length);
write_output(fname,vname,trials_array,cnt,1,2);
sprintf(fname,"signal_errors_%d_%d.m",tx_vector.rate,tx_vector.sdu_length);
sprintf(vname,"signal_errors_%d_%d_v",tx_vector.rate,tx_vector.sdu_length);
write_output(fname,vname,signal_errors_array,cnt,1,2);
free(data_ind);
free(data_ind_rx);
// free_channel_desc_scm(ch);
free(txdata);
for (i=0; i<n_rx; i++) {
free(rxdata[i]);
}
free(s_re[0]);
free(s_im[0]);
for (i=0; i<n_rx; i++) {
free(r_re[i]);
free(r_im[i]);
}
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);
}
int main(int argc, char **argv)
{
int i,l,aa,sector;
double sigma2, sigma2_dB=0;
mod_sym_t **txdataF;
#ifdef IFFT_FPGA
int **txdataF2;
#endif
int **txdata,**rxdata;
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,Td=1.0;
int channel_length;
int amp;
unsigned char pbch_pdu[6];
int sync_pos, sync_pos_slot;
FILE *rx_frame_file;
int result;
int freq_offset;
int subframe_offset;
char fname[40], vname[40];
int trial, n_errors=0;
unsigned int nb_rb = 25;
unsigned int first_rb = 0;
unsigned int eNb_id = 0;
unsigned int slot_offset = 0;
unsigned int sample_offset = 0;
unsigned int channel_offset = 0;
int n_frames;
int slot=0,last_slot=0,next_slot=0;
double nf[2] = {3.0,3.0}; //currently unused
double ip =0.0;
double N0W, path_loss, path_loss_dB, tx_pwr, rx_pwr;
double rx_gain;
int rx_pwr2, target_rx_pwr_dB;
struct complex **ch;
unsigned char first_call = 1;
LTE_DL_FRAME_PARMS frame_parms;
LTE_DL_FRAME_PARMS *lte_frame_parms = &frame_parms;
if (argc==2)
amp = atoi(argv[1]);
else
amp = 1024;
// we normalize the tx power to 0dBm, assuming the amplitude of the signal is 1024
// the SNR is this given by the difference of the path loss and the thermal noise (~-105dBm)
// the rx_gain is adjusted automatically to achieve the target_rx_pwr_dB
path_loss_dB = -90;
path_loss = pow(10,path_loss_dB/10);
target_rx_pwr_dB = 60;
lte_frame_parms->N_RB_DL = 25;
lte_frame_parms->N_RB_UL = 25;
lte_frame_parms->Ng_times6 = 1;
lte_frame_parms->Ncp = 1;
lte_frame_parms->Nid_cell = 0;
lte_frame_parms->nushift = 0;
lte_frame_parms->nb_antennas_tx = 2;
lte_frame_parms->nb_antennas_rx = 2;
lte_frame_parms->first_dlsch_symbol = 4;
lte_frame_parms->num_dlsch_symbols = 6;
lte_frame_parms->Csrs = 2;
lte_frame_parms->Bsrs = 0;
lte_frame_parms->kTC = 0;
lte_frame_parms->n_RRC = 0;
lte_frame_parms->mode1_flag = 1;
lte_frame_parms->ofdm_symbol_size = 512;
lte_frame_parms->log2_symbol_size = 9;
lte_frame_parms->samples_per_tti = 7680;
lte_frame_parms->first_carrier_offset = 362;
lte_frame_parms->nb_prefix_samples>>=2;
#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);
rxdata = (int **)malloc16(2*sizeof(int*));
rxdata[0] = (int *)malloc16(2*FRAME_LENGTH_BYTES);
rxdata[1] = (int *)malloc16(2*FRAME_LENGTH_BYTES);
bzero(rxdata[0],2*FRAME_LENGTH_BYTES);
bzero(rxdata[1],2*FRAME_LENGTH_BYTES);
txdataF2 = (int **)malloc16(2*sizeof(int*));
txdataF2[0] = (int *)malloc16(FRAME_LENGTH_BYTES);
txdataF2[1] = (int *)malloc16(FRAME_LENGTH_BYTES);
bzero(txdataF2[0],FRAME_LENGTH_BYTES);
bzero(txdataF2[1],FRAME_LENGTH_BYTES);
#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*));
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));
}
for (i=0; i<2; i++) {
for (l=0; l<FRAME_LENGTH_COMPLEX_SAMPLES; l++) {
((short*) txdata[i])[2*l] = amp * cos(M_PI/2*l);
((short*) txdata[i])[2*l+1] = amp * sin(M_PI/2*l);
}
}
tx_pwr = signal_energy(txdata[0],lte_frame_parms->samples_per_tti>>1);
printf("tx_pwr (DAC in) %d dB for slot %d (subframe %d)\n",dB_fixed(tx_pwr),next_slot,next_slot>>1);
channel_length = (int) 11+2*BW*Td;
ch = (struct complex**) malloc(4 * sizeof(struct complex*));
for (i = 0; i<4; i++)
ch[i] = (struct complex*) malloc(channel_length * sizeof(struct complex));
randominit(0);
set_taus_seed(0);
#ifdef RF
tx_pwr = dac_fixed_gain(s_re,
s_im,
txdata,
lte_frame_parms->nb_antennas_tx,
lte_frame_parms->samples_per_tti>>1,
14,
18); //this should give 0dBm output level for input with amplitude 1024
printf("tx_pwr (DAC out) %f dB for slot %d (subframe %d)\n",10*log10(tx_pwr),next_slot,next_slot>>1);
#else
for (i=0; i<(lte_frame_parms->samples_per_tti>>1); i++) {
for (aa=0; aa<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]);
}
}
#endif
// printf("channel for slot %d (subframe %d)\n",next_slot,next_slot>>1);
multipath_channel(ch,s_re,s_im,r_re,r_im,
amps,Td,BW,ricean_factor,aoa,
lte_frame_parms->nb_antennas_tx,
lte_frame_parms->nb_antennas_rx,
lte_frame_parms->samples_per_tti>>1,
channel_length,
0,
.9,
(first_call == 1) ? 1 : 0);
if (first_call == 1)
first_call = 0;
#ifdef RF
//path_loss_dB = 0;
//path_loss = 1;
for (i=0; i<(lte_frame_parms->samples_per_tti>>1); i++) {
for (aa=0; aa<lte_frame_parms->nb_antennas_rx; aa++) {
r_re[aa][i]=r_re[aa][i]*sqrt(path_loss);
r_im[aa][i]=r_im[aa][i]*sqrt(path_loss);
}
}
rx_pwr = signal_energy_fp(r_re,r_im,lte_frame_parms->nb_antennas_rx,lte_frame_parms->samples_per_tti>>1,0);
printf("rx_pwr (RF in) %f dB for slot %d (subframe %d)\n",10*log10(rx_pwr),next_slot,next_slot>>1);
rx_gain = target_rx_pwr_dB - 10*log10(rx_pwr);
// RF model
rf_rx(r_re,
r_im,
NULL,
NULL,
0,
lte_frame_parms->nb_antennas_rx,
lte_frame_parms->samples_per_tti>>1,
1.0/7.68e6 * 1e9, // sampling time (ns)
0.0, // freq offset (Hz) (-20kHz..20kHz)
0.0, // drift (Hz) NOT YET IMPLEMENTED
nf, // noise_figure NOT YET IMPLEMENTED
rx_gain-66.227, // rx gain (66.227 = 20*log10(pow2(11)) = gain from the adc that will be applied later)
200, // IP3_dBm (dBm)
&ip, // initial phase
30.0e3, // pn_cutoff (kHz)
-500.0, // pn_amp (dBc) default: 50
0.0, // IQ imbalance (dB),
0.0); // IQ phase imbalance (rad)
rx_pwr = signal_energy_fp(r_re,r_im,lte_frame_parms->nb_antennas_rx,lte_frame_parms->samples_per_tti>>1,0);
printf("rx_pwr (ADC in) %f dB for slot %d (subframe %d)\n",10*log10(rx_pwr),next_slot,next_slot>>1);
#endif
#ifdef RF
adc(r_re,
r_im,
0,
slot_offset,
rxdata,
lte_frame_parms->nb_antennas_rx,
lte_frame_parms->samples_per_tti>>1,
12);
rx_pwr2 = signal_energy(rxdata[0]+slot_offset,lte_frame_parms->samples_per_tti>>1);
printf("rx_pwr (ADC out) %f dB (%d) for slot %d (subframe %d)\n",10*log10((double)rx_pwr2),rx_pwr2,next_slot,next_slot>>1);
#else
for (i=0; i<(lte_frame_parms->samples_per_tti>>1); i++) {
for (aa=0; aa<lte_frame_parms->nb_antennas_rx; aa++) {
((short*) rxdata[aa])[2*slot_offset + (2*i)] = (short) ((r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0));
((short*) rxdata[aa])[2*slot_offset + (2*i)+1] = (short) ((r_im[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0));
}
}
#endif
write_output("rxsig0.m","rxs0",rxdata[0],lte_frame_parms->samples_per_tti>>1,1,1);
write_output("rxsig1.m","rxs1",rxdata[1],lte_frame_parms->samples_per_tti>>1,1,1);
#ifdef IFFT_FPGA
free(txdataF2[0]);
free(txdataF2[1]);
free(txdataF2);
free(txdata[0]);
free(txdata[1]);
free(txdata);
free(rxdata[0]);
free(rxdata[1]);
free(rxdata);
#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);
return(0);
}
int test_logmap8(LTE_eNB_DLSCH_t *dlsch_eNB,
LTE_UE_DLSCH_t *dlsch_ue,
unsigned int coded_bits,
unsigned char NB_RB,
double sigma,
unsigned char qbits,
unsigned int block_length,
unsigned int ntrials,
unsigned int *errors,
unsigned int *trials,
unsigned int *uerrors,
unsigned int *crc_misses,
unsigned int *iterations,
unsigned int num_pdcch_symbols,
unsigned int subframe) {
unsigned char test_input[block_length+1];
//_declspec(align(16)) char channel_output[512];
//_declspec(align(16)) unsigned char output[512],decoded_output[16], *inPtr, *outPtr;
short *channel_output;
unsigned char decoded_output[block_length];
unsigned int i,trial=0;
unsigned int crc=0;
unsigned char ret;
unsigned char uerr;
unsigned char crc_type;
channel_output = (short *)malloc(coded_bits*sizeof(short));
*iterations=0;
*errors=0;
*crc_misses=0;
*uerrors=0;
// printf("dlsch_eNB->TBS= %d\n",dlsch_eNB->harq_processes[0]->TBS);
while (trial++ < ntrials) {
// printf("encoding\n");
for (i=0;i<block_length;i++) {
test_input[i] = (unsigned char)(taus()&0xff);
}
dlsch_encoding(test_input,
&PHY_vars_eNB->lte_frame_parms,
num_pdcch_symbols,
PHY_vars_eNB->dlsch_eNB[0][0],
subframe);
uerr=0;
for (i = 0; i < coded_bits; i++){
channel_output[i] = (short)quantize(sigma/4.0,(2.0*PHY_vars_eNB->dlsch_eNB[0][0]->e[i]) - 1.0 + sigma*gaussdouble(0.0,1.0),qbits);
}
// memset(decoded_output,0,16);
// printf("decoding\n");
ret = dlsch_decoding(channel_output,
&PHY_vars_UE->lte_frame_parms,
PHY_vars_UE->dlsch_ue[0][0],
subframe,
num_pdcch_symbols);
/* int diffs = 0,puncts=0;
for (i=0;i<dlsch_ue->harq_processes[0]->Kplus*3;i++) {
if (dlsch_ue->harq_processes[0]->d[0][96+i] == 0) {
printf("%d punct (%d,%d)\n",i,dlsch_ue->harq_processes[0]->d[0][96+i],dlsch_eNb->harq_processes[0]->d[0][96+i]);
puncts++;
}
else if (sgn(dlsch_ue->harq_processes[0]->d[0][96+i]) != dlsch_eNb->harq_processes[0]->d[0][96+i]) {
printf("%d differs (%d,%d)\n",i,dlsch_ue->harq_processes[0]->d[0][96+i],dlsch_eNb->harq_processes[0]->d[0][96+i]);
diffs++;
}
else
printf("%d same (%d,%d)\n",i,dlsch_ue->harq_processes[0]->d[0][96+i],dlsch_eNb->harq_processes[0]->d[0][96+i]);
}
printf("diffs %d puncts %d(%d,%d,%d,%d,%d)\n",diffs,puncts,dlsch_ue->harq_processes[0]->F,coded_bits,3*(block_length<<3),3*dlsch_ue->harq_processes[0]->Kplus,3*dlsch_ue->harq_processes[0]->F+3*(block_length<<3)-coded_bits);
*/
// printf("ret %d\n",ret);
// printf("trial %d : i %d/%d : Input %x, Output %x (%x, F %d)\n",trial,0,block_length,test_input[0],
// dlsch_ue->harq_processes[0]->b[0],
// dlsch_ue->harq_processes[0]->c[0][0],
// (dlsch_ue->harq_processes[0]->F>>3));
if (ret < MAX_TURBO_ITERATIONS+1)
*iterations = (*iterations) + ret;
else
*iterations = (*iterations) + (ret-1);
if (uerr==1)
*uerrors = (*uerrors) + 1;
for (i=0;i<block_length;i++) {
if (dlsch_ue->harq_processes[0]->b[i] != test_input[i]) {
// printf("i %d/%d : Input %x, Output %x (%x, F %d)\n",i,block_length,test_input[i],
// dlsch_ue->harq_processes[0]->b[i],
// dlsch_ue->harq_processes[0]->c[0][i],
// (dlsch_ue->harq_processes[0]->F>>3));
*errors = (*errors) + 1;
// printf("*%d\n",*errors);
if (ret < MAX_TURBO_ITERATIONS+1)
*crc_misses = (*crc_misses)+1;
break;
}
}
if (*errors == 100) {
//printf("\n");
break;
}
}
*trials = trial;
// printf("lte: trials %d, errors %d\n",trial,*errors);
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);
}
// Leosam 08/08: What are the arguments?
int
main (int argc, char **argv)
{
// Command line parsing
int input_val = 1000; // Value serving as an input relatad to the SNR
int max_num_ofdm_sym = 64; // Index of the last frame for the channel estimation
int be_verbose = 0; // Operate in verbose mode
int index;
int c;
unsigned int rx_energy[NB_ANTENNAS], n0_energy[NB_ANTENNAS];
if (argc == 1)
{
error ();
exit (-1);
}
while ((c = getopt (argc, argv, "hVv:n:")) != -1)
{
switch (c)
{
case 'h':
help ();
exit (1);
case 'V':
be_verbose = 1;
break;
case 'v':
input_val = atoi (optarg);
break;
return 1;
case 'n':
max_num_ofdm_sym = atoi (optarg);
break;
return 1;
default:
error ();
exit (-1);
}
}
//
// Initialization stuff
//
int i, ii, j, ret, delay, l;
short seed[3];
// Leosam 08/08: What is this amps?
double amps[8] = { 1.0, .8, .4, .2, .1, .05, .025, .01 };
struct complex ch[NB_ANTENNAS * NB_ANTENNAS][10 + (int) (1 + 2 * BW * Td)];
struct complex rx_tmp, tx, n, phase;
char *chbch_pdu;
int chbch_size;
int extension;
unsigned char dummy_mac_pdu[120];
#ifdef USER_MODE
char fname[40], vname[40];
#endif // USER_MODE
if (be_verbose)
printf ("Allocating memory for PHY_VARS\n");
// Memory allocation for PHY and MAC structures
PHY_vars = malloc (sizeof (PHY_VARS));
PHY_config = malloc (sizeof (PHY_CONFIG));
mac_xface = malloc (sizeof (MAC_xface));
// Loading of the configuration data
if ((config = fopen ("config.cfg", "r")) == NULL) // this can be configured
{
if (be_verbose)
printf ("[Main USER] The openair configuration file <config.cfg> could not be found!\n");
exit (0);
}
if ((scenario = fopen ("scenario.scn", "r")) == NULL)
{
if (be_verbose)
printf ("[Main USER] The openair scenario file <scenario.scn> could not be found!\n");
exit (0);
}
if (be_verbose)
printf ("Opened configuration files\n");
reconfigure_MACPHY (scenario);
if (be_verbose)
dump_config ();
// Leosam 08/08: This is repeated bellow. Is it necessary?
mac_xface->is_cluster_head = 0;
// Initialize the PHY and MAC variables
phy_init (NB_ANTENNAS_TX);
if (be_verbose)
printf ("Initialized PHY variables\n");
// Fill MAC PDU buffer for CHBCH
seed[0] = (short) time (NULL);
seed[1] = (short) time (NULL);
seed[2] = (short) time (NULL);
seed48 (&seed[0]);
randominit ();
/*
* for (i=0;i<mac_xface->mac_tch->bch_tx[0].size-4;i++) {
* mac_xface->mac_tch->bch_tx[0].data[i] = i;//(u8)lrand48();
* }
*
*
* printf("Filled CHBCH PDU with random data\n");
*
* // Generate one CHBCH
* phy_generate_chbch(0);
*
*/
//
// Preparation for the TX procedure
//
// Creation of the CHBCH
chbch_size = (NUMBER_OF_CARRIERS_PER_GROUP * (NUMBER_OF_CHBCH_SYMBOLS) * 16) >> 3;
if (be_verbose)
printf ("chbch_size = %d\n", chbch_size);
chbch_pdu = malloc (chbch_size);
for (i = 0; i < chbch_size - 4; i++)
{
chbch_pdu[i] = i;
}
if (be_verbose)
printf ("Filled CHBCH PDU (%d bytes) with data\n", chbch_size);
// Leosam 08/08: O.o
delay = 1032;
// delay = 0;
// Generation of the CHBCH
phy_generate_chbch (0, 1, NB_ANTENNAS_TX, chbch_pdu);
// Generation of the pilot symbols
for (i = 16; i < max_num_ofdm_sym; i++)
{
phy_generate_sch (0, i, 0xFFFF, 1, NB_ANTENNAS_TX);
}
mac_xface->is_cluster_head = 0;
if (be_verbose)
{
for (ii=0; ii<NB_ANTENNAS; ii++)
{
sprintf (fname, "txsig%d.m", ii);
sprintf (vname, "txs%d", ii);
write_output (fname, vname,
(s16 *) PHY_vars->tx_vars[ii].TX_DMA_BUFFER,
NUMBER_OF_SYMBOLS_PER_FRAME * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES, 1, 1);
}
}
// generate channels
if (be_verbose)
printf ("Generating MIMO Channels\n");
phase.r = 0;
phase.i = 0;
printf("Phase pointer %0x\n",&phase);
for (i = 0; i < NB_ANTENNAS; i++)
{
for (j = 0; j < NB_ANTENNAS; j++)
{
random_channel (amps, Td, 8, BW, ch[j + (i * NB_ANTENNAS)],0.0,&phase);
}
}
if (be_verbose)
printf ("chbch_pdu %x (%d)\n", PHY_vars->chbch_data[0].demod_pdu, chbch_size);
if (be_verbose)
{
for (l = 0; l < (1 + 2 * BW * Td); l++)
{
printf ("(%f,%f)\n", ch[0][l]);
}
}
//
// TX procedure
//
// Transmission
//
//////////////////////////
// Foreach symbol
for (i = 0; i < (max_num_ofdm_sym) * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES; i++)
{
// Foreach RX antenna
for (ii = 0; ii < NB_ANTENNAS; ii++)
{
rx_tmp.r = 0;
rx_tmp.i = 0;
n.r = gaussdouble (0.0, 10.0);
n.i = gaussdouble (0.0, 10.0);
// Foreach TX antenna
for (j = 0; j < NB_ANTENNAS; j++)
{
// Foreach symbol
for (l = 0; l < (1 + 2 * BW * Td); l++)
{
tx.r = (double) (((s16 *) & PHY_vars->tx_vars[j].
TX_DMA_BUFFER[0 *
OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES])
[2 * (i - l)]) / sqrt (1.0 * input_val);
tx.i = (double) (((s16 *) & PHY_vars->tx_vars[j].
TX_DMA_BUFFER[0 *
OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES])
[1 +
(2 * (i - l))]) / sqrt (1.0 * input_val);
rx_tmp.r +=
(tx.r * ch[j + (ii * NB_ANTENNAS)][l].r) -
(tx.i * ch[j + (ii * NB_ANTENNAS)][l].i);
rx_tmp.i +=
(tx.i * ch[j + (ii * NB_ANTENNAS)][l].r) +
(tx.r * ch[j + (ii * NB_ANTENNAS)][l].i);
}
}
((s16 *) & PHY_vars->rx_vars[ii].
RX_DMA_BUFFER[delay + (0 * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES)])[2 * i] =
(short) (rx_tmp.r + n.r);
((s16 *) & PHY_vars->rx_vars[ii].
RX_DMA_BUFFER[delay + (0 * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES)])[1 +
(2 * i)] =
(short) (rx_tmp.i + n.i);
}
}
if (be_verbose)
{
for (ii=0; ii<NB_ANTENNAS; ii++)
{
sprintf (fname, "rxsig%d.m", ii);
sprintf (vname, "rxs%d", ii);
write_output (fname, vname,
(s16 *) PHY_vars->rx_vars[ii].RX_DMA_BUFFER,
NUMBER_OF_SYMBOLS_PER_FRAME * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES, 1, 1);
}
}
//
// RX procedure
//
if (be_verbose)
printf ("Starting RX\n");
// Sync
phy_synch_time (PHY_vars->rx_vars[0].RX_DMA_BUFFER,
&sync_pos,
FRAME_LENGTH_COMPLEX_SAMPLES,
768,
CHSCH,
0);
// Forcing sync to 0 since were running offline
if (be_verbose)
msg ("sync_pos = %d\n", sync_pos);
PHY_vars->rx_vars[0].offset = 0; //sync_pos;
// estamte the signal and noise energy
for (ii=0; ii < NB_ANTENNAS; ii++)
{
rx_energy[ii] = signal_energy((int *)&PHY_vars->rx_vars[ii].RX_DMA_BUFFER[PHY_vars->rx_vars[0].offset+CYCLIC_PREFIX_LENGTH],
OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
n0_energy[ii] = signal_energy((int *)&PHY_vars->rx_vars[ii].RX_DMA_BUFFER[PHY_vars->rx_vars[0].offset+CYCLIC_PREFIX_LENGTH +
(NUMBER_OF_CHSCH_SYMBOLS+NUMBER_OF_CHBCH_SYMBOLS+1) * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES],
OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
//msg("CYCLIC_PREFIX_LENGTH=%d, NUMBER_OF_CHSCH_SYMBOLS=%d, NUMBER_OF_CHBCH_SYMBOLS=%d, OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES=%d\n", CYCLIC_PREFIX_LENGTH, NUMBER_OF_CHSCH_SYMBOLS, NUMBER_OF_CHBCH_SYMBOLS, OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
msg("symbol = %d\n", PHY_vars->rx_vars[ii].RX_DMA_BUFFER[PHY_vars->rx_vars[0].offset+CYCLIC_PREFIX_LENGTH +
(NUMBER_OF_CHSCH_SYMBOLS+NUMBER_OF_CHBCH_SYMBOLS) * OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES]);
msg("SNR Ant %d = %d / %d \n", ii, rx_energy[ii], n0_energy[ii]);
}
// CHBCH channel estimation
phy_channel_estimation_top(PHY_vars->rx_vars[0].offset,0,0,0,NB_ANTENNAS,0);
//phy_channel_estimation_top (PHY_vars->rx_vars[0].offset, 0, 0, 0);
phy_decode_chbch (0, &dummy_mac_pdu[0], NB_ANTENNAS, NB_ANTENNAS_TX, 120);
if (be_verbose)
{
for (i = 0; i < chbch_size; i++)
{
msg ("Data %x : %x\n", i, PHY_vars->chbch_data[0].demod_pdu[i]);
}
}
printf("PERROR_SHIFT: %d\n", PERROR_SHIFT);
//
// Channel estimation procedure
//
// for (i = 0; i < max_num_ofdm_sym; i++)
// {
// phy_channel_estimation_top(PHY_vars->rx_vars[0].offset,i,0,0,1);
// }
phy_channel_est_emos(16, 16, max_num_ofdm_sym-1, TRUE, 0);
phy_cleanup ();
if (be_verbose)
printf ("Exiting\n");
}
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);
}