Timing Error Detection and Recovery Based on Linear Interpolation

Abstract

Timing synchronization is a critical and essential component of a satellite communication system. In order to synchronize the received signal with the sampling clock, the synchronization system in the receiving device calculates the sampling clock deviation. The timing error detector (TED) in the Gardner timing algorithm is a module for calculating the clock deviation of the synchronous system, and the recovery performance is related to the S-curve. In this paper, we propose an improved Gardner timing recovery algorithm. This method establishes a TED output timing error lookup table for the S-curve, uses the TED output as an index to determine the S-curve segment, and then uses linear interpolation to recover the timing error estimate. The results show that the estimated performance is still great in the presence of timing error and Rummerler multipath.