int main(int argc, char **argv) {
int nf, ns, N_id_2;
cf_t pss_signal[PSS_LEN];
float sss_signal0[SSS_LEN]; // for subframe 0
float sss_signal5[SSS_LEN]; // for subframe 5
pbch_mib_t mib;
refsignal_t refs[NSLOTS_X_FRAME];
int i;
cf_t *slot1_symbols[MAX_PORTS_CTRL];
#ifdef DISABLE_UHD
if (argc < 3) {
usage(argv[0]);
exit(-1);
}
#endif
parse_args(argc,argv);
N_id_2 = cell_id%3;
slot_n_re = CPNORM_NSYMB * nof_prb * RE_X_RB;
slot_n_samples = SLOT_LEN_CPNORM(lte_symbol_sz(nof_prb));
/* this *must* be called after setting slot_len_* */
base_init();
/* Generate PSS/SSS signals */
pss_generate(pss_signal, N_id_2);
sss_generate(sss_signal0, sss_signal5, cell_id);
/* Generate CRS signals */
for (i=0;i<NSLOTS_X_FRAME;i++) {
if (refsignal_init_LTEDL(&refs[i], 0, i, cell_id, CPNORM, nof_prb)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}
}
mib.nof_ports = 1;
mib.nof_prb = 6;
mib.phich_length = PHICH_NORM;
mib.phich_resources = R_1;
mib.sfn = 0;
for (i=0;i<MAX_PORTS_CTRL;i++) { // now there's only 1 port
slot1_symbols[i] = slot_buffer;
}
#ifndef DISABLE_UHD
if (!output_file_name) {
printf("Set TX rate: %.2f MHz\n", cuhd_set_tx_srate(uhd, UHD_SAMP_FREQ)/1000000);
printf("Set TX gain: %.1f dB\n", cuhd_set_tx_gain(uhd, uhd_gain));
printf("Set TX freq: %.2f MHz\n", cuhd_set_tx_freq(uhd, uhd_freq)/1000000);
}
#endif
nf = 0;
while(nf<nof_frames || nof_frames == -1) {
for (ns=0;ns<NSLOTS_X_FRAME;ns++) {
bzero(slot_buffer, sizeof(cf_t) * slot_n_re);
switch(ns) {
case 0: // tx pss/sss
case 10: // tx pss/sss
pss_put_slot(pss_signal, slot_buffer, nof_prb, CPNORM);
sss_put_slot(ns?sss_signal5:sss_signal0, slot_buffer, nof_prb, CPNORM);
break;
case 1: // tx pbch
pbch_encode(&pbch, &mib, slot1_symbols, 1);
break;
default: // transmit zeros
break;
}
refsignal_put(&refs[ns], slot_buffer);
/* Transform to OFDM symbols */
lte_ifft_run(&ifft, slot_buffer, output_buffer);
/* send to file or usrp */
if (output_file_name) {
filesink_write(&fsink, output_buffer, slot_n_samples);
usleep(5000);
} else {
#ifndef DISABLE_UHD
vec_sc_prod_cfc(output_buffer, uhd_amp, output_buffer, slot_n_samples);
cuhd_send(uhd, output_buffer, slot_n_samples, 1);
#endif
}
}
mib.sfn=(mib.sfn+1)%1024;
printf("SFN: %4d\r", mib.sfn);fflush(stdout);
nf++;
}
base_free();
printf("Done\n");
exit(0);
}
int main(int argc, char **argv) {
int nf, sf_idx, N_id_2;
cf_t pss_signal[PSS_LEN];
float sss_signal0[SSS_LEN]; // for subframe 0
float sss_signal5[SSS_LEN]; // for subframe 5
pbch_mib_t mib;
ra_pdsch_t ra_dl;
ra_prb_t prb_alloc;
refsignal_t refs[NSLOTS_X_FRAME];
int i, n;
char *data;
cf_t *sf_symbols[MAX_PORTS];
dci_msg_t dci_msg;
dci_location_t locations[NSUBFRAMES_X_FRAME][10];
#ifdef DISABLE_UHD
if (argc < 3) {
usage(argv[0]);
exit(-1);
}
#endif
parse_args(argc, argv);
N_id_2 = cell.id % 3;
sf_n_re = 2 * CPNORM_NSYMB * cell.nof_prb * RE_X_RB;
sf_n_samples = 2 * SLOT_LEN(lte_symbol_sz(cell.nof_prb));
/* this *must* be called after setting slot_len_* */
base_init();
/* Generate PSS/SSS signals */
pss_generate(pss_signal, N_id_2);
sss_generate(sss_signal0, sss_signal5, cell.id);
/* Generate CRS signals */
for (i = 0; i < NSLOTS_X_FRAME; i++) {
if (refsignal_init_LTEDL(&refs[i], 0, i, cell)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}
}
mib.nof_ports = cell.nof_ports;
mib.nof_prb = cell.nof_prb;
mib.phich_length = PHICH_NORM;
mib.phich_resources = R_1;
mib.sfn = 0;
for (i = 0; i < MAX_PORTS; i++) { // now there's only 1 port
sf_symbols[i] = sf_buffer;
}
#ifndef DISABLE_UHD
if (!output_file_name) {
printf("Set TX rate: %.2f MHz\n",
cuhd_set_tx_srate(uhd, lte_sampling_freq_hz(cell.nof_prb)) / 1000000);
printf("Set TX gain: %.1f dB\n", cuhd_set_tx_gain(uhd, uhd_gain));
printf("Set TX freq: %.2f MHz\n",
cuhd_set_tx_freq(uhd, uhd_freq) / 1000000);
}
#endif
bzero(&ra_dl, sizeof(ra_pdsch_t));
ra_dl.harq_process = 0;
ra_dl.mcs_idx = mcs_idx;
ra_dl.ndi = 0;
ra_dl.rv_idx = 0;
ra_dl.alloc_type = alloc_type0;
ra_dl.type0_alloc.rbg_bitmask = 0xffffffff;
dci_msg_pack_pdsch(&ra_dl, &dci_msg, Format1, cell.nof_prb, false);
ra_prb_get_dl(&prb_alloc, &ra_dl, cell.nof_prb);
ra_prb_get_re_dl(&prb_alloc, cell.nof_prb, 1, cell.nof_prb<10?(cfi+1):cfi, CPNORM);
ra_mcs_from_idx_dl(mcs_idx, cell.nof_prb, &ra_dl.mcs);
ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb);
/* Initiate valid DCI locations */
for (i=0;i<NSUBFRAMES_X_FRAME;i++) {
pdcch_ue_locations(&pdcch, locations[i], 10, i, cfi, 1234);
}
data = malloc(sizeof(char) * ra_dl.mcs.tbs);
if (!data) {
perror("malloc");
exit(-1);
}
nf = 0;
if (pdsch_harq_setup(&harq_process, ra_dl.mcs, &prb_alloc)) {
fprintf(stderr, "Error configuring HARQ process\n");
exit(-1);
}
while (nf < nof_frames || nof_frames == -1) {
for (sf_idx = 0; sf_idx < NSUBFRAMES_X_FRAME && (nf < nof_frames || nof_frames == -1); sf_idx++) {
bzero(sf_buffer, sizeof(cf_t) * sf_n_re);
if (sf_idx == 0 || sf_idx == 5) {
pss_put_slot(pss_signal, sf_buffer, cell.nof_prb, CPNORM);
sss_put_slot(sf_idx ? sss_signal5 : sss_signal0, sf_buffer, cell.nof_prb,
CPNORM);
}
if (sf_idx == 0) {
pbch_encode(&pbch, &mib, sf_symbols);
}
for (n=0;n<2;n++) {
refsignal_put(&refs[2*sf_idx+n], &sf_buffer[n*sf_n_re/2]);
}
pcfich_encode(&pcfich, cfi, sf_symbols, sf_idx);
INFO("SF: %d, Generating %d random bits\n", sf_idx, ra_dl.mcs.tbs);
for (i=0;i<ra_dl.mcs.tbs;i++) {
data[i] = rand()%2;
}
INFO("Puttting DCI to location: n=%d, L=%d\n", locations[sf_idx][0].ncce, locations[sf_idx][0].L);
if (pdcch_encode(&pdcch, &dci_msg, locations[sf_idx][0], 1234, sf_symbols, sf_idx, cfi)) {
fprintf(stderr, "Error encoding DCI message\n");
exit(-1);
}
if (pdsch_encode(&pdsch, data, sf_symbols, sf_idx, &harq_process, ra_dl.rv_idx)) {
fprintf(stderr, "Error encoding PDSCH\n");
exit(-1);
}
/* Transform to OFDM symbols */
lte_ifft_run_sf(&ifft, sf_buffer, output_buffer);
/* send to file or usrp */
if (output_file_name) {
filesink_write(&fsink, output_buffer, sf_n_samples);
usleep(5000);
} else {
#ifndef DISABLE_UHD
vec_sc_prod_cfc(output_buffer, uhd_amp, output_buffer, sf_n_samples);
cuhd_send(uhd, output_buffer, sf_n_samples, true);
#endif
}
nf++;
}
mib.sfn = (mib.sfn + 1) % 1024;
printf("SFN: %4d\r", mib.sfn);
fflush(stdout);
}
base_free();
printf("Done\n");
exit(0);
}
int main(int argc, char **argv) {
chest_t eq;
cf_t *input = NULL, *ce = NULL, *h = NULL;
refsignal_t refs;
int i, j, n_port, n_slot, cid, num_re;
int ret = -1;
int max_cid;
FILE *fmatlab = NULL;
float mse_mag, mse_phase;
parse_args(argc,argv);
if (output_matlab) {
fmatlab=fopen(output_matlab, "w");
if (!fmatlab) {
perror("fopen");
goto do_exit;
}
}
num_re = nof_prb * RE_X_RB * CP_NSYMB(cp);
input = malloc(num_re * sizeof(cf_t));
if (!input) {
perror("malloc");
goto do_exit;
}
h = malloc(num_re * sizeof(cf_t));
if (!h) {
perror("malloc");
goto do_exit;
}
ce = malloc(num_re * sizeof(cf_t));
if (!ce) {
perror("malloc");
goto do_exit;
}
if (cell_id == -1) {
cid = 0;
max_cid = 504;
} else {
cid = cell_id;
max_cid = cell_id;
}
while(cid <= max_cid) {
if (chest_init(&eq, LINEAR, cp, nof_prb, MAX_PORTS)) {
fprintf(stderr, "Error initializing equalizer\n");
goto do_exit;
}
if (chest_ref_LTEDL(&eq, cid)) {
fprintf(stderr, "Error initializing reference signal\n");
goto do_exit;
}
for (n_slot=0;n_slot<NSLOTS_X_FRAME;n_slot++) {
for (n_port=0;n_port<MAX_PORTS;n_port++) {
if (refsignal_init_LTEDL(&refs, n_port, n_slot, cid, cp, nof_prb)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}
bzero(input, sizeof(cf_t) * num_re);
for (i=0;i<num_re;i++) {
input[i] = 0.5-rand()/RAND_MAX+I*(0.5-rand()/RAND_MAX);
}
bzero(ce, sizeof(cf_t) * num_re);
bzero(h, sizeof(cf_t) * num_re);
refsignal_put(&refs, input);
refsignal_free(&refs);
for (i=0;i<CP_NSYMB(cp);i++) {
for (j=0;j<nof_prb * RE_X_RB;j++) {
float x = -1+(float) i/CP_NSYMB(cp) + cosf(2 * M_PI * (float) j/nof_prb/RE_X_RB);
h[i*nof_prb * RE_X_RB+j] = (3+x) * cexpf(I * x);
input[i*nof_prb * RE_X_RB+j] *= h[i*nof_prb * RE_X_RB+j];
}
}
chest_ce_slot_port(&eq, input, ce, n_slot, n_port);
mse_mag = mse_phase = 0;
for (i=0;i<num_re;i++) {
mse_mag += (cabsf(h[i]) - cabsf(ce[i])) * (cabsf(h[i]) - cabsf(ce[i])) / num_re;
mse_phase += (cargf(h[i]) - cargf(ce[i])) * (cargf(h[i]) - cargf(ce[i])) / num_re;
}
if (check_mse(mse_mag, mse_phase, n_port)) {
goto do_exit;
}
if (fmatlab) {
fprintf(fmatlab, "input=");
vec_fprint_c(fmatlab, input, num_re);
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "h=");
vec_fprint_c(fmatlab, h, num_re);
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "ce=");
vec_fprint_c(fmatlab, ce, num_re);
fprintf(fmatlab, ";\n");
chest_fprint(&eq, fmatlab, n_slot, n_port);
}
}
}
chest_free(&eq);
cid+=10;
INFO("cid=%d\n", cid);
}
ret = 0;
do_exit:
if (ce) {
free(ce);
}
if (input) {
free(input);
}
if (h) {
free(h);
}
if (!ret) {
printf("OK\n");
} else {
printf("Error at cid=%d, slot=%d, port=%d\n",cid, n_slot, n_port);
}
exit(ret);
}
