/* This thread listens for set_rx_gain commands to the USRP */
static void* thread_gain_fcn(void *h) {
cuhd_handler *handler = static_cast < cuhd_handler * >(h);
while(1) {
pthread_mutex_lock(&handler->mutex);
while(handler->cur_rx_gain == handler->new_rx_gain &&
handler->cur_tx_gain == handler->new_tx_gain)
{
pthread_cond_wait(&handler->cond, &handler->mutex);
}
if (handler->new_rx_gain != handler->cur_rx_gain) {
handler->cur_rx_gain = handler->new_rx_gain;
cuhd_set_rx_gain(h, handler->cur_rx_gain);
}
if (handler->tx_gain_same_rx) {
cuhd_set_tx_gain(h, handler->cur_rx_gain+handler->tx_rx_gain_offset);
} else if (handler->new_tx_gain != handler->cur_tx_gain) {
handler->cur_tx_gain = handler->new_tx_gain;
cuhd_set_tx_gain(h, handler->cur_tx_gain);
}
pthread_mutex_unlock(&handler->mutex);
}
}
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) {
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 sf_idx=0, N_id_2=0;
cf_t pss_signal[SRSLTE_PSS_LEN];
float sss_signal0[SRSLTE_SSS_LEN]; // for subframe 0
float sss_signal5[SRSLTE_SSS_LEN]; // for subframe 5
int i;
#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 * SRSLTE_CP_NORM_NSYMB * cell.nof_prb * SRSLTE_NRE;
sf_n_samples = 2 * SRSLTE_SLOT_LEN(srslte_symbol_sz(cell.nof_prb));
cell.phich_length = SRSLTE_PHICH_NORM;
cell.phich_resources = SRSLTE_PHICH_R_1;
/* this *must* be called after setting slot_len_* */
base_init();
/* Generate PSS/SSS signals */
srslte_pss_generate(pss_signal, N_id_2);
srslte_sss_generate(sss_signal0, sss_signal5, cell.id);
printf("Set TX rate: %.2f MHz\n",
cuhd_set_tx_srate(uhd, srslte_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);
uint32_t nbits;
srslte_modem_table_t modulator;
srslte_modem_table_init(&modulator);
srslte_modem_table_lte(&modulator, modulation);
srslte_tcod_t turbocoder;
srslte_tcod_init(&turbocoder, SRSLTE_TCOD_MAX_LEN_CB);
srslte_dft_precoding_t dft_precod;
srslte_dft_precoding_init(&dft_precod, 12);
nbits = srslte_cbsegm_cbindex(sf_n_samples/8/srslte_mod_bits_x_symbol(modulation)/3 - 12);
uint32_t ncoded_bits = sf_n_samples/8/srslte_mod_bits_x_symbol(modulation);
uint8_t *data = malloc(sizeof(uint8_t)*nbits);
uint8_t *data_enc = malloc(sizeof(uint8_t)*ncoded_bits);
cf_t *symbols = malloc(sizeof(cf_t)*sf_n_samples);
bzero(data_enc, sizeof(uint8_t)*ncoded_bits);
while (1) {
for (sf_idx = 0; sf_idx < SRSLTE_NSUBFRAMES_X_FRAME; sf_idx++) {
bzero(sf_buffer, sizeof(cf_t) * sf_n_re);
#ifdef kk
if (sf_idx == 0 || sf_idx == 5) {
srslte_pss_put_slot(pss_signal, sf_buffer, cell.nof_prb, SRSLTE_CP_NORM);
srslte_sss_put_slot(sf_idx ? sss_signal5 : sss_signal0, sf_buffer, cell.nof_prb,
SRSLTE_CP_NORM);
/* Transform to OFDM symbols */
srslte_ofdm_tx_sf(&ifft, sf_buffer, output_buffer);
float norm_factor = (float) sqrtf(cell.nof_prb)/15;
srslte_vec_sc_prod_cfc(output_buffer, uhd_amp*norm_factor, output_buffer, SRSLTE_SF_LEN_PRB(cell.nof_prb));
} else {
#endif
/* Generate random data */
for (i=0;i<nbits;i++) {
data[i] = rand()%2;
}
srslte_tcod_encode(&turbocoder, data, data_enc, nbits);
srslte_mod_modulate(&modulator, data_enc, symbols, ncoded_bits);
srslte_interp_linear_offset_cabs(symbols, output_buffer, 8, sf_n_samples/8, 0, 0);
// }
/* send to usrp */
srslte_vec_sc_prod_cfc(output_buffer, uhd_amp, output_buffer, sf_n_samples);
cuhd_send(uhd, output_buffer, sf_n_samples, true);
}
}
base_free();
printf("Done\n");
exit(0);
}
int main(int argc, char **argv) {
parse_args(argc, argv);
srslte_prach_t *p = (srslte_prach_t*)malloc(sizeof(srslte_prach_t));
bool high_speed_flag = false;
cf_t preamble[MAX_LEN];
memset(preamble, 0, sizeof(cf_t)*MAX_LEN);
srslte_prach_init(p,
srslte_symbol_sz(nof_prb),
preamble_format,
root_seq_idx,
high_speed_flag,
zero_corr_zone);
uint32_t flen = srslte_sampling_freq_hz(nof_prb)/1000;
printf("Generating PRACH\n");
bzero(preamble, flen*sizeof(cf_t));
srslte_prach_gen(p,
seq_idx,
frequency_offset,
preamble);
uint32_t prach_len = p->N_seq;
srslte_vec_save_file("generated",preamble,prach_len*sizeof(cf_t));
cf_t *buffer = malloc(sizeof(cf_t)*flen*nof_frames);
// Send through UHD
void *uhd;
printf("Opening UHD device...\n");
if (cuhd_open(uhd_args, &uhd)) {
fprintf(stderr, "Error opening uhd\n");
exit(-1);
}
printf("Subframe len: %d samples\n", flen);
printf("Set TX/RX rate: %.2f MHz\n", cuhd_set_rx_srate(uhd, srslte_sampling_freq_hz(nof_prb)) / 1000000);
printf("Set RX gain: %.1f dB\n", cuhd_set_rx_gain(uhd, uhd_gain));
printf("Set TX gain: %.1f dB\n", cuhd_set_tx_gain(uhd, uhd_gain));
printf("Set TX/RX freq: %.2f MHz\n", cuhd_set_rx_freq(uhd, uhd_freq) / 1000000);
cuhd_set_tx_srate(uhd, srslte_sampling_freq_hz(nof_prb));
cuhd_set_tx_freq_offset(uhd, uhd_freq, 8e6);
sleep(1);
cf_t *zeros = calloc(sizeof(cf_t),flen);
FILE *f = NULL;
if (output_filename) {
f = fopen(output_filename, "w");
}
srslte_timestamp_t tstamp;
cuhd_start_rx_stream(uhd);
uint32_t nframe=0;
while(nframe<nof_frames) {
printf("Rx subframe %d\n", nframe);
cuhd_recv_with_time(uhd, &buffer[flen*nframe], flen, true, &tstamp.full_secs, &tstamp.frac_secs);
nframe++;
if (nframe==9 || nframe==8) {
srslte_timestamp_add(&tstamp, 0, 2e-3);
if (nframe==8) {
cuhd_send_timed2(uhd, zeros, flen, tstamp.full_secs, tstamp.frac_secs, true, false);
printf("Transmitting zeros\n");
} else {
cuhd_send_timed2(uhd, preamble, flen, tstamp.full_secs, tstamp.frac_secs, true, true);
printf("Transmitting PRACH\n");
}
}
}
if (f) {
fwrite(&buffer[10*flen], flen*sizeof(cf_t), 1, f);
}
if (f) {
fclose(f);
}
srslte_prach_free(p);
free(p);
printf("Done\n");
exit(0);
}