From 39fe985681bcc63b0c23fc214549984b8b051785 Mon Sep 17 00:00:00 2001
From: Thomas Schlichter <thomas.schlichter@iis.fraunhofer.de>
Date: Tue, 11 Oct 2022 11:31:34 +0200
Subject: [PATCH] NR_UE: slightly improve timing synchronization by minimizing
the adjustment of the filtered peak position value
---
executables/nr-ue.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/executables/nr-ue.c b/executables/nr-ue.c
index 8b022adc62e..c2747738804 100644
--- a/executables/nr-ue.c
+++ b/executables/nr-ue.c
@@ -798,10 +798,10 @@ void syncInFrame(PHY_VARS_NR_UE *UE, openair0_timestamp *timestamp) {
int computeSamplesShift(PHY_VARS_NR_UE *UE) {
int samples_shift = -(UE->rx_offset>>1);
- UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame
- UE->max_pos_fil = 0; // reset IIR filter when sample shift is applied
if (samples_shift != 0) {
LOG_I(NR_PHY,"Adjusting frame in time by %i samples\n", samples_shift);
+ UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame
+ UE->max_pos_fil += samples_shift; // reset IIR filter when sample shift is applied
}
return samples_shift;
}
--
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