MECHANISM TO FACILITATE TIMING RECOVERY IN TIME DIVISION DUPLEX SYSTEMS

摘要

In general, the present invention relates to systems and methods to facilitate timing recovery and loop timing operations in a TDD communication system with significantly varying intervals of inactivity between periods of transmission. According to certain aspects, to facilitate timing recovery, embodiments of the invention define a maximum period of inactivity for each mode of transmission and associated "timing keep alive" signals during and/or between transmissions to assist the timing recovery function in the receiver. In embodiments, the receiver selects the desired format of the "timing keep alive" signal. According to further aspects, the timing recovery mechanisms of the invention maintain power saving objectives of G.fast, where power dissipation varies near linearly with traffic demand.