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Refactor pss_search_time_nr() with configurable search window

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Add search_start and search_length parameters to pss_search_time_nr()
to support targeted PSS searches within specific time windows.
This commit is contained in:
alexjiao
2026-01-09 11:25:16 +08:00
parent 13933f9db8
commit dfd3ad267e
2 changed files with 53 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair1/PHY/NR_REFSIG/pss_nr.h
+12
View File
@@ -86,6 +86,18 @@ int pss_synchro_nr(const c16_t **rxdata,
int *f_off, int *f_off,
int *pssPeak, int *pssPeak,
int *pssAvg); int *pssAvg);
int pss_search_time_nr(const c16_t **rxdata,
const NR_DL_FRAME_PARMS *frame_parms,
const c16_t pssTime[NUMBER_PSS_SEQUENCE][frame_parms->ofdm_symbol_size],
bool fo_flag,
int is,
int target_Nid_cell,
int *nid2,
int *f_off,
int *pssPeak,
int *pssAvg,
int search_start,
int search_length);
void generate_pss_nr_time(const NR_DL_FRAME_PARMS *fp, const int N_ID_2, int ssbFirstSCS, c16_t pssTime[fp->ofdm_symbol_size]); void generate_pss_nr_time(const NR_DL_FRAME_PARMS *fp, const int N_ID_2, int ssbFirstSCS, c16_t pssTime[fp->ofdm_symbol_size]);
int16_t *get_primary_synchro_nr2(const int nid2); int16_t *get_primary_synchro_nr2(const int nid2);
openair1/PHY/NR_UE_TRANSPORT/pss_nr.c
+41 -31
View File
@@ -50,16 +50,18 @@
//#define DBG_PSS_NR //#define DBG_PSS_NR
static time_stats_t generic_time[TIME_LAST]; static time_stats_t generic_time[TIME_LAST];
static int pss_search_time_nr(const c16_t **rxdata, int pss_search_time_nr(const c16_t **rxdata,
const NR_DL_FRAME_PARMS *frame_parms, const NR_DL_FRAME_PARMS *frame_parms,
const c16_t pssTime[NUMBER_PSS_SEQUENCE][frame_parms->ofdm_symbol_size], const c16_t pssTime[NUMBER_PSS_SEQUENCE][frame_parms->ofdm_symbol_size],
bool fo_flag, bool fo_flag,
int is, int is,
int target_Nid_cell, int target_Nid_cell,
int *nid2, int *nid2,
int *f_off, int *f_off,
int *pssPeak, int *pssPeak,
int *pssAvg); int *pssAvg,
int search_start,
int search_length);
static int16_t primary_synchro_nr2[NUMBER_PSS_SEQUENCE][LENGTH_PSS_NR] = {0}; static int16_t primary_synchro_nr2[NUMBER_PSS_SEQUENCE][LENGTH_PSS_NR] = {0};
static c16_t primary_synchro[NUMBER_PSS_SEQUENCE][LENGTH_PSS_NR] = {0}; static c16_t primary_synchro[NUMBER_PSS_SEQUENCE][LENGTH_PSS_NR] = {0};
@@ -407,7 +409,7 @@ int pss_synchro_nr(const c16_t **rxdata,
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PSS_SEARCH_TIME_NR, VCD_FUNCTION_IN); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PSS_SEARCH_TIME_NR, VCD_FUNCTION_IN);
int synchro_position = int synchro_position =
pss_search_time_nr(rxdata, frame_parms, pssTime, fo_flag, is, target_Nid_cell, nid2, f_off, pssPeak, pssAvg); pss_search_time_nr(rxdata, frame_parms, pssTime, fo_flag, is, target_Nid_cell, nid2, f_off, pssPeak, pssAvg, -1, -1);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PSS_SEARCH_TIME_NR, VCD_FUNCTION_OUT); VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PSS_SEARCH_TIME_NR, VCD_FUNCTION_OUT);
@@ -496,30 +498,38 @@ int pss_synchro_nr(const c16_t **rxdata,
* *
*********************************************************************/ *********************************************************************/
static int pss_search_time_nr(const c16_t **rxdata, int pss_search_time_nr(const c16_t **rxdata,
const NR_DL_FRAME_PARMS *frame_parms, const NR_DL_FRAME_PARMS *frame_parms,
const c16_t pssTime[NUMBER_PSS_SEQUENCE][frame_parms->ofdm_symbol_size], const c16_t pssTime[NUMBER_PSS_SEQUENCE][frame_parms->ofdm_symbol_size],
bool fo_flag, bool fo_flag,
int is, int is,
int target_Nid_cell, int target_Nid_cell,
int *nid2, int *nid2,
int *f_off, int *f_off,
int *pssPeak, int *pssPeak,
int *pssAvg) int *pssAvg,
int search_start,
int search_length)
{ {
unsigned int n, ar, peak_position, pss_source; unsigned int n, ar, peak_position, pss_source;
int64_t peak_value; int64_t peak_value;
int64_t avg[NUMBER_PSS_SEQUENCE] = {0}; int64_t avg[NUMBER_PSS_SEQUENCE] = {0};
double ffo_est = 0; double ffo_est = 0;
// performing the correlation on a frame length plus one symbol for the first of the two frame // Determine search window
// to take into account the possibility of PSS in between the two frames unsigned int start, length;
unsigned int length; if (search_start >= 0 && search_length > 0) {
if (is==0) // Use provided search window for known neighboring cells
length = frame_parms->samples_per_frame + (2*frame_parms->ofdm_symbol_size); start = search_start;
else length = search_length;
length = frame_parms->samples_per_frame; } else {
// For initial cell search
start = 0;
if (is == 0)
length = frame_parms->samples_per_frame + (2 * frame_parms->ofdm_symbol_size);
else
length = frame_parms->samples_per_frame;
}
AssertFatal(length>0,"illegal length %d\n",length); AssertFatal(length>0,"illegal length %d\n",length);
peak_value = 0; peak_value = 0;
@@ -547,7 +557,7 @@ static int pss_search_time_nr(const c16_t **rxdata,
} }
for (int pss_index = pss_index_start; pss_index < pss_index_end; pss_index++) { for (int pss_index = pss_index_start; pss_index < pss_index_end; pss_index++) {
for (n = 0; n < length; n += 4) { // for (n = start; n < start + length; n += 4) { //
int64_t pss_corr_ue=0; int64_t pss_corr_ue=0;
/* calculate dot product of primary_synchro_time_nr and rxdata[ar][n] /* calculate dot product of primary_synchro_time_nr and rxdata[ar][n]
@@ -627,7 +637,7 @@ static int pss_search_time_nr(const c16_t **rxdata,
dB_fixed64(avg[pss_source]), dB_fixed64(avg[pss_source]),
ffo_est); ffo_est);
if (peak_value < 5*avg[pss_source]) if ((search_start < 0 || search_length == 0) && peak_value < 5 * avg[pss_source])
return(-1); return(-1);