Abstract: This paper presents a high precise method for symbol timing synchronization, which is realized by using a synchronization searching/tracking loop combined with the re-sampling of the input digital signal based on a multi-phase filter-bank whose filters are deduced from a low-pass filter prototype with different group delays. The method is a fully-digitized process at the sampling clock rate, so that it can be conveniently implemented by FPGA or DSP, whose synchronization precision can reach 1% of the sampling interval.

Key words: symbol timing synchronization, multi-phase filter-bank, sample interpolation