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Adjust samples in time only when valid PBCH is present

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This commit is contained in:
Sakthivel Velumani
2023-05-22 12:40:51 -04:00
parent 6cc01f7cd9
commit 9825842e97
5 changed files with 23 additions and 27 deletions
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executables/nr-ue.c
+7 -18
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@@ -734,16 +734,6 @@ void syncInFrame(PHY_VARS_NR_UE *UE, openair0_timestamp *timestamp) {
}
}
int computeSamplesShift(PHY_VARS_NR_UE *UE) {
int samples_shift = -(UE->rx_offset>>1);
if (samples_shift != 0) {
LOG_I(NR_PHY,"Adjusting frame in time by %i samples\n", samples_shift);
UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame
UE->max_pos_fil += samples_shift << 15; // reset IIR filter when sample shift is applied
}
return samples_shift;
}
static inline int get_firstSymSamp(uint16_t slot, NR_DL_FRAME_PARMS *fp) {
if (fp->numerology_index == 0)
return fp->nb_prefix_samples0 + fp->ofdm_symbol_size;
@@ -904,14 +894,13 @@ void *UE_thread(void *arg) {
int readBlockSize, writeBlockSize;
if (slot_nr<(nb_slot_frame - 1)) {
readBlockSize=get_readBlockSize(slot_nr, &UE->frame_parms);
writeBlockSize=UE->frame_parms.get_samples_per_slot((slot_nr + DURATION_RX_TO_TX) % nb_slot_frame, &UE->frame_parms);
} else {
UE->rx_offset_diff = computeSamplesShift(UE);
readBlockSize=get_readBlockSize(slot_nr, &UE->frame_parms) -
UE->rx_offset_diff;
writeBlockSize=UE->frame_parms.get_samples_per_slot((slot_nr + DURATION_RX_TO_TX) % nb_slot_frame, &UE->frame_parms)- UE->rx_offset_diff;
readBlockSize=get_readBlockSize(slot_nr, &UE->frame_parms);
writeBlockSize=UE->frame_parms.get_samples_per_slot((slot_nr + DURATION_RX_TO_TX) % nb_slot_frame, &UE->frame_parms);
if (UE->apply_timing_offset && (slot_nr == nb_slot_frame-1)) {
const int sampShift = -(UE->rx_offset>>1);
readBlockSize -= sampShift;
writeBlockSize -= sampShift;
UE->apply_timing_offset = false;
}
AssertFatal(readBlockSize ==