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Normalization of energy over ifft and receive antennas

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This commit is contained in:
rmagueta
2021-07-16 16:50:51 +01:00
parent abef7f0b08
commit 64c28bf9ac
2 changed files with 24 additions and 12 deletions
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openair1/PHY/NR_TRANSPORT/nr_prach.c
+23 -11
View File
@@ -872,24 +872,36 @@ void rx_nr_prach(PHY_VARS_gNB *gNB,
// Now do IFFT of size 1024 (N_ZC=839) or 256 (N_ZC=139)
if (N_ZC == 839) {
log2_ifft_size = 10;
idft(IDFT_1024,prachF,prach_ifft_tmp,1);
// compute energy and accumulate over receive antennas
for (i=0;i<2048;i++)
prach_ifft[i] += ((int32_t)prach_ifft_tmp[i<<1]*(int32_t)prach_ifft_tmp[i<<1] + (int32_t)prach_ifft_tmp[1+(i<<1)]*(int32_t)prach_ifft_tmp[1+(i<<1)])/nb_rx;
for (i=0;i<1024;i++)
prach_ifft[i] += (int32_t)prach_ifft_tmp[i<<1]*(int32_t)prach_ifft_tmp[i<<1] + (int32_t)prach_ifft_tmp[1+(i<<1)]*(int32_t)prach_ifft_tmp[1+(i<<1)];
} else {
idft(IDFT_256,prachF,prach_ifft_tmp,1);
log2_ifft_size = 8;
// compute energy and accumulate over receive antennas and repetitions for BR
for (i=0;i<256;i++)
prach_ifft[i] += ((int32_t)prach_ifft_tmp[i<<1]*(int32_t)prach_ifft_tmp[(i<<1)] + (int32_t)prach_ifft_tmp[1+(i<<1)]*(int32_t)prach_ifft_tmp[1+(i<<1)])/nb_rx;
}
// compute energy and accumulate over receive antennas and repetitions for BR
for (i=0;i<256;i++)
prach_ifft[i] += (int32_t)prach_ifft_tmp[i<<1]*(int32_t)prach_ifft_tmp[(i<<1)] + (int32_t)prach_ifft_tmp[1+(i<<1)]*(int32_t)prach_ifft_tmp[1+(i<<1)];
}
if (LOG_DUMPFLAG(PRACH)) {
if (aa==0) LOG_M("prach_rxF_comp0.m","prach_rxF_comp0",prachF,1024,1,1);
if (aa==1) LOG_M("prach_rxF_comp1.m","prach_rxF_comp1",prachF,1024,1,1);
}
if (LOG_DUMPFLAG(PRACH)) {
if (aa==0) LOG_M("prach_rxF_comp0.m","prach_rxF_comp0",prachF,1024,1,1);
if (aa==1) LOG_M("prach_rxF_comp1.m","prach_rxF_comp1",prachF,1024,1,1);
}
}// antennas_rx
// Normalization of energy over ifft and receive antennas
if (N_ZC == 839) {
log2_ifft_size = 10;
for (i=0;i<1024;i++)
prach_ifft[i] = (prach_ifft[i]>>log2_ifft_size)/nb_rx;
} else {
log2_ifft_size = 8;
for (i=0;i<256;i++)
prach_ifft[i] = (prach_ifft[i]>>log2_ifft_size)/nb_rx;
}
} // new dft
// check energy in nth time shift, for
openair2/GNB_APP/L1_nr_paramdef.h
+1 -1
View File
@@ -66,7 +66,7 @@
{CONFIG_STRING_L1_REMOTE_N_PORTD, NULL, 0, uptr:NULL, defintval:50031, TYPE_UINT, 0}, \
{CONFIG_STRING_L1_PUSCH_PROC_THREADS, NULL, 0, uptr:NULL, defintval:1, TYPE_UINT, 0}, \
{CONFIG_STRING_L1_PUCCH0_DTX_THRESHOLD, NULL, 0, uptr:NULL, defintval:100, TYPE_UINT, 0}, \
{CONFIG_STRING_L1_PRACH_DTX_THRESHOLD, NULL, 0, uptr:NULL, defintval:200, TYPE_UINT, 0}, \
{CONFIG_STRING_L1_PRACH_DTX_THRESHOLD, NULL, 0, uptr:NULL, defintval:150, TYPE_UINT, 0}, \
{CONFIG_STRING_L1_PUSCH_DTX_THRESHOLD, NULL, 0, uptr:NULL, defintval:50, TYPE_UINT, 0} \
}
#define L1_CC_IDX 0