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NR UE: add support for continuous DL frequency offset compensation (--cont-fo-comp)

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Thomas Schlichter
2025-04-10 13:54:59 +00:00
parent 616568a79d
commit aac4642910
9 changed files with 42 additions and 6 deletions
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executables/nr-ue.c
+9 -4
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@@ -436,9 +436,13 @@ static void UE_synch(void *arg) {
((ret.rx_offset << 1) / fp->samples_per_subframe * fp->slots_per_subframe)
+ round((float)((ret.rx_offset << 1) % fp->samples_per_subframe) / fp->samples_per_slot0);
// rerun with new cell parameters and frequency-offset
// todo: the freq_offset computed on DL shall be scaled before being applied to UL
nr_rf_card_config_freq(cfg0, ul_carrier, dl_carrier, freq_offset);
if (get_nrUE_params()->cont_fo_comp) {
UE->freq_offset = freq_offset;
} else {
// rerun with new cell parameters and frequency-offset
nr_rf_card_config_freq(cfg0, ul_carrier, dl_carrier, freq_offset);
UE->rfdevice.trx_set_freq_func(&UE->rfdevice, cfg0);
}
if (get_nrUE_params()->agc) {
nr_ue_adjust_rx_gain(UE, cfg0, UE->adjust_rxgain);
@@ -452,7 +456,6 @@ static void UE_synch(void *arg) {
cfg0->rx_freq[0],
cfg0->tx_freq[0]);
UE->rfdevice.trx_set_freq_func(&UE->rfdevice, cfg0);
UE->is_synchronized = 1;
} else {
int gain_change = 0;
@@ -913,6 +916,8 @@ void *UE_thread(void *arg)
if (usrp_tx_thread == 1)
UE->rfdevice.trx_write_init(&UE->rfdevice);
InitSinLUT();
notifiedFIFO_t nf;
initNotifiedFIFO(&nf);