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NR_UE: reset max_pos_fil in timing synchronization whenever we add/remove a sample

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This commit is contained in:
Thomas Schlichter
2021-10-27 17:30:05 +02:00
parent 2c2ba26553
commit 209d5f1131
3 changed files with 12 additions and 10 deletions
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executables/nr-ue.c
+4 -2
View File
@@ -464,14 +464,16 @@ int computeSamplesShift(PHY_VARS_NR_UE *UE) {
if ( UE->rx_offset < UE->frame_parms.samples_per_frame/2 &&
UE->rx_offset > 0 ) {
//LOG_I(PHY,"!!!adjusting -1 samples!!!\n");
UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame
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 = 0; // reset IIR filter when sample shift is applied
return -1 ;
}
if ( UE->rx_offset > UE->frame_parms.samples_per_frame/2 &&
UE->rx_offset < UE->frame_parms.samples_per_frame ) {
//LOG_I(PHY,"!!!adjusting +1 samples!!!\n");
UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame
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 = 0; // reset IIR filter when sample shift is applied
return 1;
}
openair1/PHY/NR_UE_ESTIMATION/nr_adjust_synch_ue.c
+5 -6
View File
@@ -42,7 +42,6 @@ void nr_adjust_synch_ue(NR_DL_FRAME_PARMS *frame_parms,
short coef)
{
static int max_pos_fil = 0;
static int count_max_pos_ok = 0;
static int first_time = 1;
int max_val = 0, max_pos = 0;
@@ -74,14 +73,14 @@ void nr_adjust_synch_ue(NR_DL_FRAME_PARMS *frame_parms,
// filter position to reduce jitter
if (clear == 1)
max_pos_fil = max_pos;
ue->max_pos_fil = max_pos;
else
max_pos_fil = ((max_pos_fil * coef) + (max_pos * ncoef)) >> 15;
ue->max_pos_fil = ((ue->max_pos_fil * coef) + (max_pos * ncoef)) >> 15;
// do not filter to have proactive timing adjustment
//max_pos_fil = max_pos;
//ue->max_pos_fil = max_pos;
int diff = max_pos_fil - sync_pos;
int diff = ue->max_pos_fil - sync_pos;
if (frame_parms->freq_range==nr_FR2)
sync_offset = 2;
@@ -129,7 +128,7 @@ void nr_adjust_synch_ue(NR_DL_FRAME_PARMS *frame_parms,
ue->rx_offset,
clear,
max_pos,
max_pos_fil,
ue->max_pos_fil,
max_val,
sync_pos);
#endif //DEBUG_PHY
openair1/PHY/defs_nr_UE.h
+3 -2
View File
@@ -921,9 +921,10 @@ typedef struct {
uint8_t init_sync_frame;
/// temporary offset during cell search prior to MIB decoding
int ssb_offset;
uint16_t symbol_offset; // offset in terms of symbols for detected ssb in sync
int rx_offset; /// Timing offset
uint16_t symbol_offset; /// offset in terms of symbols for detected ssb in sync
int rx_offset; /// Timing offset
int rx_offset_diff; /// Timing adjustment for ofdm symbol0 on HW USRP
int max_pos_fil; /// Timing offset IIR filter
int time_sync_cell;
/// Timing Advance updates variables