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NR UE: make the power averaging IIR filter faster

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Especially high initial noise levels would stay too long and negatively impact the accuracy of later S(I)NR computations.
This commit is contained in:
Thomas Schlichter
2025-09-09 11:17:43 +02:00
parent e70bb45ebd
commit 1c63d44afd
1 changed files with 5 additions and 6 deletions
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openair1/PHY/NR_UE_ESTIMATION/nr_ue_measurements.c
+5 -6
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@@ -38,9 +38,8 @@
#include "common/utils/LOG/log.h"
#include "PHY/sse_intrin.h"
//#define k1 1000
#define k1 ((long long int) 1000)
#define k2 ((long long int) (1024-k1))
#define K1 ((long long int) 512)
#define K2 ((long long int) (1024-K1))
//#define DEBUG_MEAS_RRC
//#define DEBUG_MEAS_UE
@@ -136,11 +135,11 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
if (ue->init_averaging == 0) {
for (gNB_id = 0; gNB_id < ue->n_connected_gNB; gNB_id++)
ue->measurements.rx_power_avg[gNB_id] = (int)(((k1*((long long int)(ue->measurements.rx_power_avg[gNB_id]))) + (k2*((long long int)(ue->measurements.rx_power_tot[gNB_id])))) >> 10);
ue->measurements.rx_power_avg[gNB_id] = (int)((K1 * ue->measurements.rx_power_avg[gNB_id] + K2 * ue->measurements.rx_power_tot[gNB_id]) >> 10);
ue->measurements.n0_power_avg = (int)(((k1*((long long int) (ue->measurements.n0_power_avg))) + (k2*((long long int) (ue->measurements.n0_power_tot))))>>10);
ue->measurements.n0_power_avg = (int)((K1 * ue->measurements.n0_power_avg + K2 * ue->measurements.n0_power_tot) >> 10);
LOG_D(PHY, "Noise Power Computation: k1 %lld k2 %lld n0 avg %u n0 tot %u\n", k1, k2, ue->measurements.n0_power_avg, ue->measurements.n0_power_tot);
LOG_D(PHY, "Noise Power Computation: K1 %lld K2 %lld n0 avg %u n0 tot %u\n", K1, K2, ue->measurements.n0_power_avg, ue->measurements.n0_power_tot);
} else {