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removed division by num_antenna_ports in PDSCH precoding matrix generation. These matrices are defined for CSI reporting in this way but here we are using them for transmission and this results in an unwanted 10*log10(num_antenna_ports) reduction in transmit power

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Raymond Knopp
2024-09-29 10:17:56 +02:00
parent ccdabb4c2c
commit d2ebc356a0
1 changed files with 2 additions and 2 deletions
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openair2/LAYER2/NR_MAC_gNB/config.c
+2 -2
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@@ -136,7 +136,7 @@ int precoding_weigths_generation(nfapi_nr_pm_list_t *mat,
double complex res_code;
for (int i_rows = 0; i_rows < N1 * N2; i_rows++) {
nfapi_nr_pm_weights_t *weights = &mat->pmi_pdu[pmiq].weights[j_col][i_rows];
res_code = sqrt(1 / (double)(L * num_antenna_ports)) * v_lm[llc][mmc][i_rows];
res_code = sqrt(1 / (double)L) * v_lm[llc][mmc][i_rows];
c16_t precoder_weight = convert_precoder_weight(res_code);
weights->precoder_weight_Re = precoder_weight.r;
weights->precoder_weight_Im = precoder_weight.i;
@@ -153,7 +153,7 @@ int precoding_weigths_generation(nfapi_nr_pm_list_t *mat,
}
for (int i_rows = N1 * N2; i_rows < 2 * N1 * N2; i_rows++) {
nfapi_nr_pm_weights_t *weights = &mat->pmi_pdu[pmiq].weights[j_col][i_rows];
res_code = sqrt(1 / (double)(L * num_antenna_ports)) * (phase_sign)*theta_n[nn] * v_lm[llc][mmc][i_rows - N1 * N2];
res_code = sqrt(1 / (double)L) * (phase_sign)*theta_n[nn] * v_lm[llc][mmc][i_rows - N1 * N2];
c16_t precoder_weight = convert_precoder_weight(res_code);
weights->precoder_weight_Re = precoder_weight.r;
weights->precoder_weight_Im = precoder_weight.i;