NR_UE: improve timing and initial frequency synchronization

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;
 }