void do_plots(ue_dl_t *q, uint32_t sf_idx) {
int i;
uint32_t nof_re = SLOT_LEN_RE(q->cell.nof_prb, q->cell.cp);
uint32_t nof_symbols = q->harq_process[0].prb_alloc.re_sf[sf_idx];
for (i = 0; i < nof_re; i++) {
tmp_plot[i] = 10 * log10f(cabsf(q->sf_symbols[i]));
if (isinf(tmp_plot[i])) {
tmp_plot[i] = -80;
}
}
plot_real_setNewData(&poutfft, tmp_plot, nof_re);
plot_complex_setNewData(&pce, q->ce[0], nof_re);
plot_scatter_setNewData(&pscatrecv, q->pdsch.pdsch_symbols[0], nof_symbols);
plot_scatter_setNewData(&pscatequal, q->pdsch.pdsch_d, nof_symbols);
}
int main(int argc, char **argv) {
cf_t *input_buffer, *sf_symbols = NULL;
int frame_cnt;
ue_sync_t s;
int pos;
pss_synch_t pss;
float peak;
struct timeval t[3];
float mean_ce_time=0;
bool signal_detected;
lte_fft_t fft;
lte_cell_t cell;
bzero(&cell, sizeof(lte_cell_t));
parse_args(argc, argv);
#ifndef DISABLE_GRAPHICS
if (!disable_plots) {
init_plots();
}
#endif
input_init();
if (ue_sync_init(&s, cuhd_set_rx_srate, cuhd_recv_wrapper, uhd)) {
fprintf(stderr, "Error initiating UE sync module\n");
exit(-1);
}
ue_sync_pbch_enable(&s, true);
signal_detected = true;
frame_cnt = 0;
mean_ce_time=0;
uint32_t valid_frames=0;
//uint32_t unaligned = 0;
while (frame_cnt < nof_frames || nof_frames == -1) {
int n = ue_sync_get_buffer(&s, &input_buffer);
if (n < 0) {
fprintf(stderr, "Error calling sync work()\n");
exit(-1);
}
if (n == 1 && ue_sync_get_sfidx(&s) == 0) {
if (signal_detected) {
cell = ue_sync_get_cell(&s);
pss_synch_init_fft(&pss,
SF_LEN(lte_symbol_sz(cell.nof_prb), cell.cp),
lte_symbol_sz(cell.nof_prb));
pss_synch_set_N_id_2(&pss, cell.id%3);
sf_symbols = vec_malloc(SLOT_LEN_RE(cell.nof_prb, cell.cp) * sizeof(cf_t));
if (!sf_symbols) {
perror("malloc");
exit(-1);
}
lte_fft_init(&fft, cell.cp, cell.nof_prb);
signal_detected = false;
}
mean_ce_time = (float) (mean_ce_time + (float) t[0].tv_usec * valid_frames) / (valid_frames+1);
valid_frames++;
#ifndef DISABLE_GRAPHICS
if (!disable_plots && !(valid_frames % 5) && sf_symbols) {
/* Run FFT for the second slot */
lte_fft_run_slot(&fft, input_buffer, sf_symbols);
int i;
int nof_re = SLOT_LEN_RE(cell.nof_prb, cell.cp);
for (i = 0; i < nof_re; i++) {
tmp_plot[i] = 10 * log10f(cabsf(sf_symbols[i]));
if (isinf(tmp_plot[i])) {
tmp_plot[i] = -80;
}
}
plot_real_setNewData(&poutfft, tmp_plot, nof_re);
}
#endif
pos = pss_synch_find_pss(&pss, input_buffer, &peak, NULL);
/*if (pos > 962 || pos < 958) {
unaligned++;
}
*/
printf("CELL_ID: %3d CFO: %+.4f KHz, SFO: %+.4f Khz, TimeOffset: %4d, Exec: %3.2f\r",
cell.id, ue_sync_get_cfo(&s)/1000, ue_sync_get_sfo(&s)/1000, pos,
s.mean_exec_time);
fflush(stdout);
if (VERBOSE_ISINFO()) {
printf("\n");
}
}
frame_cnt++;
}
printf("\nBye\n");
exit(0);
}
/**********************************************************************
* Plotting Functions
***********************************************************************/
#ifndef DISABLE_GRAPHICS
#include "liblte/graphics/plot.h"
plot_real_t poutfft;
plot_complex_t pce;
plot_scatter_t pscatrecv, pscatequal;
float tmp_plot[SLOT_LEN_RE(MAX_PRB, CPNORM)];
void init_plots() {
plot_init();
plot_real_init(&poutfft);
plot_real_setTitle(&poutfft, "Output FFT - Magnitude");
plot_real_setLabels(&poutfft, "Index", "dB");
plot_real_setYAxisScale(&poutfft, -30, 20);
plot_complex_init(&pce);
plot_complex_setTitle(&pce, "Channel Estimates");
plot_complex_setYAxisScale(&pce, Ip, -3, 3);
plot_complex_setYAxisScale(&pce, Q, -3, 3);
plot_complex_setYAxisScale(&pce, Magnitude, 0, 4);
plot_complex_setYAxisScale(&pce, Phase, -M_PI, M_PI);
