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Fix PUCCH noise estimation.

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(cherry picked from commit 51634853671e07ef3013bc44ec79fc38c0646147)
This commit is contained in:
masayuki.harada
2020-11-27 14:45:27 +09:00
committed by shono.takafumi
parent 174069e26e
commit ad4a22fa0f
1 changed files with 13 additions and 6 deletions
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openair1/PHY/LTE_TRANSPORT/pucch.c
+13 -6
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@@ -743,7 +743,8 @@ uint32_t calc_pucch_1x_interference(PHY_VARS_eNB *eNB,
uint8_t n_cs,alpha_ind;
int16_t tmp_re,tmp_im,W_re=0,W_im=0;
int16_t W4_nouse[4]={1,1,-1,-1};
int32_t interference_power;
int32_t n0_IQ[2];
double interference_power;
int16_t *rxptr;
uint32_t symbol_offset;
@@ -769,7 +770,7 @@ uint32_t calc_pucch_1x_interference(PHY_VARS_eNB *eNB,
zptr = (int16_t *)z;
N_UL_symb = (frame_parms->Ncp==NORMAL) ? 7 : 6;
interference_power=0;
interference_power=0.0;
calc_cnt=0;
// loop over 2 slots
for (n_cs=0; n_cs<12; n_cs++) {
@@ -778,6 +779,7 @@ uint32_t calc_pucch_1x_interference(PHY_VARS_eNB *eNB,
//loop over symbols in slot
for (l=0; l<N_UL_symb; l++) {
if(((l>1)&&(l<N_UL_symb-2)) || ((ns==(1+(subframe<<1))) && (shortened_format==1)) ){
zptr+=24;
continue;
}
@@ -817,8 +819,11 @@ uint32_t calc_pucch_1x_interference(PHY_VARS_eNB *eNB,
// Do detection
for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
n0_IQ[0]=0;
n0_IQ[1]=0;
for (j=0,l=0; l<nsymb; l++) {
if((((l%N_UL_symb)>1)&&((l%N_UL_symb)<N_UL_symb-2)) || ((nsymb>=N_UL_symb) && (shortened_format==1)) ){
j+=24;
continue;
}
if ((l<(nsymb>>1)) && ((m&1) == 0))
@@ -842,15 +847,17 @@ uint32_t calc_pucch_1x_interference(PHY_VARS_eNB *eNB,
rxcomp[aa][j] = (int16_t)((rxptr[re_offset<<1]*(int32_t)zptr[j])>>15) - ((rxptr[1+(re_offset<<1)]*(int32_t)zptr[1+j])>>15);
rxcomp[aa][1+j] = (int16_t)((rxptr[re_offset<<1]*(int32_t)zptr[1+j])>>15) + ((rxptr[1+(re_offset<<1)]*(int32_t)zptr[j])>>15);
interference_power+= ((int32_t)rxcomp[aa][j]*(int32_t)rxcomp[aa][j]+(int32_t)rxcomp[aa][1+j]*(int32_t)rxcomp[aa][1+j]);
n0_IQ[0]+=rxcomp[aa][j];
n0_IQ[1]+=rxcomp[aa][1+j];
calc_cnt++;
} //re
} // symbol
interference_power+= (int32_t)(n0_IQ[0]*n0_IQ[0]+n0_IQ[1]*n0_IQ[1]);
} // antenna
}
calc_cnt/=12;
//printf("pucch noise %d %d %d\n",interference_power,calc_cnt,eNB->measurements.n0_subband_power_tot_dB[0]);
eNB->measurements.n0_pucch_dB = dB_fixed_x10(interference_power/calc_cnt)/10;
interference_power /= calc_cnt;
eNB->measurements.n0_pucch_dB = dB_fixed_x10((int)(interference_power/calc_cnt))/10;
LOG_D(PHY,"estimate pucch noise %d %d %d\n",interference_power,calc_cnt,eNB->measurements.n0_pucch_dB);
return 0;
}