NR UE: add command line parameter ntn-initial-time-drift to compensate time...
NR UE: add command line parameter ntn-initial-time-drift to compensate time drift during initial sync The value of ntn_init_time_drift is used at initial sync to compensate for the time drift during initial sync detection. To perform the initial time and frequency sync, the OAI UE currently takes a snapshot of two frames and then performes PSS correlation, SSS detection and MIB decoding. Doing this takes much time, several tens of ms. During that time, the DL timing drifts so much, that we immediatedly lose sync again. Therefore the current OAI UE implementation needs to know the drift rate to compensate for this drift, as we are "blind" while performing the initial sync. To my undestanding, commercial UEs simply have a faster initial sync, so the DL timing will not drift away too much while performing that initial sync.
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