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Introduce SRS oversampling for better accuracy in estimating nanoseconds

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This commit is contained in:
Rakesh Mundlamuri
2026-01-09 16:58:34 +05:30
parent 7846d83b07
commit b378acf2e0
6 changed files with 38 additions and 22 deletions
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openair1/SCHED_NR/phy_procedures_nr_gNB.c
+5 -4
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@@ -868,14 +868,14 @@ void nr_srs_rx_procedures(PHY_VARS_gNB *gNB,
nr_srs_info_t *nr_srs_info,
int *srs_est,
c16_t srs_estimated_channel_freq[][N_ap][ofdm_symbol_size * N_symb_SRS],
c16_t srs_estimated_channel_time[][N_ap][ofdm_symbol_size],
c16_t srs_estimated_channel_time[][N_ap][NR_SRS_IDFT_OVERSAMP_FACTOR * ofdm_symbol_size],
int16_t *snr_per_rb)
{
NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
nfapi_nr_srs_pdu_t *srs_pdu = &srs->srs_pdu;
c16_t srs_received_signal[nb_antennas_rx][ofdm_symbol_size * N_symb_SRS];
c16_t srs_received_noise[nb_antennas_rx][ofdm_symbol_size * N_symb_SRS];
c16_t srs_estimated_channel_time_shifted[nb_antennas_rx][N_ap][ofdm_symbol_size];
c16_t srs_estimated_channel_time_shifted[nb_antennas_rx][N_ap][NR_SRS_IDFT_OVERSAMP_FACTOR * ofdm_symbol_size];
start_meas(&gNB->generate_srs_stats);
@@ -946,7 +946,7 @@ void nr_srs_rx_procedures(PHY_VARS_gNB *gNB,
T_INT(frame_rx),
T_INT(0),
T_INT(0),
T_BUFFER(srs_estimated_channel_time_shifted[0][0], ofdm_symbol_size * sizeof(int32_t)));
T_BUFFER(srs_estimated_channel_time_shifted[0][0], NR_SRS_IDFT_OVERSAMP_FACTOR * ofdm_symbol_size * sizeof(int32_t)));
T(T_GNB_PHY_UL_SNR_ESTIMATE,
T_INT(0),
@@ -1171,7 +1171,8 @@ int phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx, N
int srs_est;
c16_t srs_estimated_channel_freq[nb_antennas_rx][N_ap][ofdm_symbol_size * N_symb_SRS] __attribute__((aligned(32)));
c16_t srs_estimated_channel_time[nb_antennas_rx][N_ap][ofdm_symbol_size] __attribute__((aligned(32)));
c16_t srs_estimated_channel_time[nb_antennas_rx][N_ap][NR_SRS_IDFT_OVERSAMP_FACTOR * ofdm_symbol_size]
__attribute__((aligned(32)));
nr_srs_rx_procedures(gNB,
frame_rx,