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Move more variables to nr_srs_channel_estimation() function

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This commit is contained in:
Roberto Louro Magueta
2022-08-08 16:25:50 +01:00
parent 65b56db9ec
commit e5133cf669
3 changed files with 12 additions and 22 deletions
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openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+12 -13
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@@ -970,9 +970,6 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
int32_t srs_estimated_channel_freq[][1<<srs_pdu->num_ant_ports][gNB->frame_parms.ofdm_symbol_size*(1<<srs_pdu->num_symbols)],
int32_t srs_estimated_channel_time[][1<<srs_pdu->num_ant_ports][gNB->frame_parms.ofdm_symbol_size],
int32_t srs_estimated_channel_time_shifted[][1<<srs_pdu->num_ant_ports][gNB->frame_parms.ofdm_symbol_size],
uint32_t *signal_power,
uint32_t *noise_power_per_rb,
uint32_t *noise_power,
int8_t *snr_per_rb,
int8_t *snr) {
@@ -993,6 +990,7 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
}
c16_t srs_ls_estimated_channel[frame_parms->ofdm_symbol_size*(1<<srs_pdu->num_symbols)];
uint32_t noise_power_per_rb[srs_pdu->bwp_size];
int16_t ch_real[frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS];
int16_t ch_imag[frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS];
int16_t noise_real[frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS];
@@ -1003,6 +1001,7 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
for (int p_index = 0; p_index < N_ap; p_index++) {
memset(srs_ls_estimated_channel, 0, frame_parms->ofdm_symbol_size*(1<<srs_pdu->num_symbols)*sizeof(c16_t));
memset(srs_estimated_channel_freq[ant][p_index], 0, frame_parms->ofdm_symbol_size*(1<<srs_pdu->num_symbols)*sizeof(int32_t));
#ifdef SRS_DEBUG
@@ -1178,21 +1177,21 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
} // for (int ant = 0; ant < frame_parms->nb_antennas_rx; ant++)
// Compute signal power
*signal_power = calc_power(ch_real,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS)
+ calc_power(ch_imag,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS);
uint32_t signal_power = calc_power(ch_real,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS)
+ calc_power(ch_imag,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS);
#ifdef SRS_DEBUG
LOG_I(NR_PHY,"signal_power = %u\n", *signal_power);
LOG_I(NR_PHY,"signal_power = %u\n", signal_power);
#endif
if (*signal_power == 0) {
if (signal_power == 0) {
LOG_W(NR_PHY, "Received SRS signal power is 0\n");
return -1;
}
// Compute noise power
const uint8_t signal_power_bits = log2_approx(*signal_power);
const uint8_t signal_power_bits = log2_approx(signal_power);
const uint8_t factor_bits = signal_power_bits < 32 ? 32 - signal_power_bits : 0; // 32 due to input of dB_fixed(uint32_t x)
const int32_t factor_dB = dB_fixed(1<<factor_bits);
@@ -1224,7 +1223,7 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
noise_power_per_rb[rb] = max(sum_re2 / n_noise_est - (sum_re / n_noise_est) * (sum_re / n_noise_est) +
sum_im2 / n_noise_est - (sum_im / n_noise_est) * (sum_im / n_noise_est), 1);
snr_per_rb[rb] = dB_fixed((int32_t)((*signal_power<<factor_bits)/noise_power_per_rb[rb])) - factor_dB;
snr_per_rb[rb] = dB_fixed((int32_t)((signal_power<<factor_bits)/noise_power_per_rb[rb])) - factor_dB;
#ifdef SRS_DEBUG
LOG_I(NR_PHY,"noise_power_per_rb[%i] = %i, snr_per_rb[%i] = %i dB\n", rb, noise_power_per_rb[rb], rb, snr_per_rb[rb]);
@@ -1232,13 +1231,13 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
} // for (int rb = 0; rb < m_SRS_b; rb++)
*noise_power = calc_power(noise_real,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS)
+ calc_power(noise_imag,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS);
uint32_t noise_power = calc_power(noise_real,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS)
+ calc_power(noise_imag,frame_parms->nb_antennas_rx*N_ap*M_sc_b_SRS);
*snr = dB_fixed((int32_t)((*signal_power<<factor_bits)/(*noise_power))) - factor_dB;
*snr = dB_fixed((int32_t)((signal_power<<factor_bits)/(noise_power))) - factor_dB;
#ifdef SRS_DEBUG
LOG_I(NR_PHY,"noise_power = %u, SNR = %i dB\n", *noise_power, *snr);
LOG_I(NR_PHY,"noise_power = %u, SNR = %i dB\n", noise_power, *snr);
#endif
return 0;
openair1/PHY/NR_ESTIMATION/nr_ul_estimation.h
-3
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@@ -76,9 +76,6 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
int32_t srs_estimated_channel_freq[][1<<srs_pdu->num_ant_ports][gNB->frame_parms.ofdm_symbol_size*(1<<srs_pdu->num_symbols)],
int32_t srs_estimated_channel_time[][1<<srs_pdu->num_ant_ports][gNB->frame_parms.ofdm_symbol_size],
int32_t srs_estimated_channel_time_shifted[][1<<srs_pdu->num_ant_ports][gNB->frame_parms.ofdm_symbol_size],
uint32_t *signal_power,
uint32_t *noise_power_per_rb,
uint32_t *noise_power,
int8_t *snr_per_rb,
int8_t *snr);
#endif
openair1/SCHED_NR/phy_procedures_nr_gNB.c
-6
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@@ -885,10 +885,7 @@ int phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
int32_t srs_estimated_channel_freq[frame_parms->nb_antennas_rx][1<<srs_pdu->num_ant_ports][frame_parms->ofdm_symbol_size*N_symb_SRS] __attribute__ ((aligned(32)));
int32_t srs_estimated_channel_time[frame_parms->nb_antennas_rx][1<<srs_pdu->num_ant_ports][frame_parms->ofdm_symbol_size] __attribute__ ((aligned(32)));
int32_t srs_estimated_channel_time_shifted[frame_parms->nb_antennas_rx][1<<srs_pdu->num_ant_ports][frame_parms->ofdm_symbol_size];
uint32_t noise_power_per_rb[srs_pdu->bwp_size];
int8_t snr_per_rb[srs_pdu->bwp_size];
uint32_t signal_power;
uint32_t noise_power;
int8_t snr;
// At least currently, the configuration is constant, so it is enough to generate the sequence just once.
@@ -909,9 +906,6 @@ int phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
srs_estimated_channel_freq,
srs_estimated_channel_time,
srs_estimated_channel_time_shifted,
&signal_power,
noise_power_per_rb,
&noise_power,
snr_per_rb,
&snr);
}