Split-window time-alignment

Details Split-window time-alignment Split-window time-alignment

H - Electricity

04

J

H04J 3/06 (2006.01) H04B 7/26 (2006.01) H04L 7/08 (2006.01)

Patent

CA 2061872

Synchronization is maintained between a regional radio transmitter/receiver and a remote transmitter/receiver communicating across a TDMA channel by detecting time misalignment of communications from the remote transmitter/receiver to the regional transmitter/receiver, commanding the remote transmitter/receiver to adjust its transmission timing, and, until the remote transmitter/receiver has adjusted its transmission timing, looking for a synchronization pattern accompanying transmissions by the remoter transmitter/receiver during two discontinuous time intervals, one centered about a time of occurrence of the synchronization pattern before the command and another centered about an expected time of occurrence of the synchronization pattern in response to the command. Effectively, what would otherwise be a disadvantageously wide tune window is split into two advantageously narrow time windows to avoid detection of false syncs. Fewer false syncs are detected; and speech quality is increased.

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