1. An apparatus for timing recovery, applied to a communication system, comprising: a modulo processing circuit for receiving an input signal for performing a modulo operation; a slicer for rounding an output signal of the modulo processing circuit into an integer signal; and a de-modulo processing circuit coupled to the slicer for performing a de-modulo operation on the output signal of the slicer to generate a de-modulo output signal; wherein the de-modulo operation indicates an inverse function of the modulo operation.