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Limit amp_dmrs to 16 bit signed max

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amp_dmrs is used to scale individual 16bit samples. hence, limit it to
the signed maximum of 16 bits.
This commit is contained in:
Robert Schmidt
2025-02-28 11:39:30 +01:00
parent f0fce7c167
commit 4901467e6f
1 changed files with 5 additions and 5 deletions
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openair1/PHY/NR_TRANSPORT/nr_dlsch.c
+5 -5
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@@ -97,7 +97,7 @@ typedef union {
c16_t s[2];
} amp_t;
static inline int interleave_with_0_signal_first(c16_t *output, c16_t *mod_dmrs, const int amp_dmrs, int sz)
static inline int interleave_with_0_signal_first(c16_t *output, c16_t *mod_dmrs, const int16_t amp_dmrs, int sz)
{
#ifdef DEBUG_DLSCH_MAPPING
printf("doing DMRS pattern for port 0 : d0 0 d1 0 ... dNm2 0 dNm1 0 (ul %d, rr %d)\n", upper_limit, remaining_re);
@@ -149,7 +149,7 @@ static inline int interleave_with_0_signal_first(c16_t *output, c16_t *mod_dmrs,
return 0;
}
static inline int interleave_with_0_start_with_0(c16_t *output, c16_t *mod_dmrs, const int amp_dmrs, int sz)
static inline int interleave_with_0_start_with_0(c16_t *output, c16_t *mod_dmrs, const int16_t amp_dmrs, int sz)
{
#ifdef DEBUG_DLSCH_MAPPING
printf("doing DMRS pattern for port 2 : 0 d0 0 d1 ... 0 dNm2 0 dNm1\n");
@@ -258,7 +258,7 @@ static inline int interleave_signals(c16_t *output, c16_t *signal1, const int am
static inline int dmrs_case00(c16_t *output,
c16_t *txl,
c16_t *mod_dmrs,
const int amp_dmrs,
const int16_t amp_dmrs,
const int amp,
int sz,
int start_sc,
@@ -349,7 +349,7 @@ static inline int do_onelayer(NR_DL_FRAME_PARMS *frame_parms,
uint16_t dlPtrsSymPos,
int n_ptrs,
int amp,
int amp_dmrs,
int16_t amp_dmrs,
int l_prime,
nfapi_nr_dmrs_type_e dmrs_Type,
c16_t *dmrs_start)
@@ -559,7 +559,7 @@ static int do_one_dlsch(unsigned char *input_ptr, PHY_VARS_gNB *gNB, NR_gNB_DLSC
const int symbol_sz=frame_parms->ofdm_symbol_size;
const int dmrs_Type = rel15->dmrsConfigType;
const int nb_re_dmrs = rel15->numDmrsCdmGrpsNoData * (rel15->dmrsConfigType == NFAPI_NR_DMRS_TYPE1 ? 6 : 4);
const int amp_dmrs = (int)((double)amp * sqrt(rel15->numDmrsCdmGrpsNoData)); // 3GPP TS 38.214 Section 4.1: Table 4.1-1
const int16_t amp_dmrs = min((double)amp * sqrt(rel15->numDmrsCdmGrpsNoData), INT16_MAX); // 3GPP TS 38.214 Section 4.1: Table 4.1-1
LOG_D(PHY,
"pdsch: BWPStart %d, BWPSize %d, rbStart %d, rbsize %d\n",
rel15->BWPStart,