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csi: fix regression introduced in !3834

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This commit is contained in:
Sakthivel Velumani
2026-03-31 19:10:49 +00:00
parent af4b0d53e9
commit e3b74e542d
1 changed files with 8 additions and 6 deletions
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openair1/PHY/NR_UE_TRANSPORT/csi_rx.c
+8 -6
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@@ -290,9 +290,10 @@ static int nr_csi_rs_channel_estimation(
// loop over frequency resource elements within a group
for (int kp = 0; kp <= csi_mapping->kprime; kp++) {
uint16_t kinit = (fp->first_carrier_offset + rb*NR_NB_SC_PER_RB) % fp->ofdm_symbol_size;
uint16_t k = kinit + csi_mapping->koverline[cdm_id] + kp;
uint16_t kinit_rx = (fp->first_carrier_offset + rb * NR_NB_SC_PER_RB) % fp->ofdm_symbol_size;
uint16_t k_rx = kinit_rx + csi_mapping->koverline[cdm_id] + kp;
uint16_t kinit_tx = rb * NR_NB_SC_PER_RB;
uint16_t k_tx = kinit_tx + csi_mapping->koverline[cdm_id] + kp;
// loop over time resource elements within a group
for (int lp = 0; lp <= csi_mapping->lprime; lp++) {
@@ -300,11 +301,12 @@ static int nr_csi_rs_channel_estimation(
uint64_t symbol_offset = symb * fp->ofdm_symbol_size;
const c16_t *tx_csi_rs_signal = &csi_rs_generated_signal[port_tx][symbol_offset];
const c16_t *rx_csi_rs_signal = &csi_rs_received_signal[ant_rx][symbol_offset];
c16_t tmp = c16MulConjShift(tx_csi_rs_signal[k], rx_csi_rs_signal[k], nr_csi_info->csi_rs_generated_signal_bits);
c16_t tmp =
c16MulConjShift(tx_csi_rs_signal[k_tx], rx_csi_rs_signal[k_rx], nr_csi_info->csi_rs_generated_signal_bits);
// This is not just the LS estimation for each (k,l), but also the sum of the different contributions
// for the sake of optimizing the memory used.
csi_rs_ls_estimated_channel[ant_rx][port_tx][kinit].r += tmp.r;
csi_rs_ls_estimated_channel[ant_rx][port_tx][kinit].i += tmp.i;
csi_rs_ls_estimated_channel[ant_rx][port_tx][kinit_rx].r += tmp.r;
csi_rs_ls_estimated_channel[ant_rx][port_tx][kinit_rx].i += tmp.i;
}
}
}