diff --git a/openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c b/openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
index 00b053e3ff..e2e9500162 100644
--- a/openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
+++ b/openair1/PHY/NR_ESTIMATION/nr_ul_channel_estimation.c
@@ -1141,6 +1141,11 @@ int nr_srs_channel_estimation(const PHY_VARS_gNB *gNB,
       if (count_estimates == n_noise_estimates) {
         noise_power_per_rb[rb] = sum_re2/n_noise_estimates - (sum_re/n_noise_estimates)*(sum_re/n_noise_estimates) +
                                  sum_im2/n_noise_estimates - (sum_im/n_noise_estimates)*(sum_im/n_noise_estimates);
+
+        if (noise_power_per_rb[rb] == 0) {
+          noise_power_per_rb[rb] = 1;
+        }
+
         snr_per_rb[rb] = dB_fixed((int32_t)((*signal_power<<factor_bits)/noise_power_per_rb[rb])) - factor_dB;
         count_estimates = 0;
         sum_re = 0;
diff --git a/openair1/SCHED_NR/phy_procedures_nr_gNB.c b/openair1/SCHED_NR/phy_procedures_nr_gNB.c
index ca0cd380d2..c05040a2cb 100644
--- a/openair1/SCHED_NR/phy_procedures_nr_gNB.c
+++ b/openair1/SCHED_NR/phy_procedures_nr_gNB.c
@@ -858,8 +858,8 @@ int phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
         uint8_t N_symb_SRS = 1<<srs_pdu->num_symbols;
         int32_t srs_received_signal[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size*N_symb_SRS];
         int32_t srs_ls_estimated_channel[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size*N_symb_SRS];
-        int32_t srs_estimated_channel_freq[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size*N_symb_SRS];
-        int32_t srs_estimated_channel_time[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size];
+        int32_t srs_estimated_channel_freq[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size*N_symb_SRS] __attribute__ ((aligned(32)));
+        int32_t srs_estimated_channel_time[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size] __attribute__ ((aligned(32)));
         int32_t srs_estimated_channel_time_shifted[frame_parms->nb_antennas_rx][frame_parms->ofdm_symbol_size];
         uint32_t noise_power_per_rb[srs_pdu->bwp_size];
         int8_t snr_per_rb[srs_pdu->bwp_size];