Patent ID: 6999527

Claim:
A symbol timing recovery circuit receiving in-phase signal components and quadrature signal components and searching and outputting an optimal sampling point in a symbol cycle using the phase signal components and the quadrature signal components, which circuit comprises: a transform value generation circuit, which uses the in-phase signal components and the quadrature signal components of the same sampling point in any two consecutive symbols to generate a transform value corresponding to the sampling point; a selection circuit, which is electrically coupled with the transform value generation circuit to receive the transform value output from the transform value generation circuit and to output the transform value according to the order of the sampling point; a plurality of accumulators, each of which receives the transform value of a corresponding sampling point output from the selection circuit, with the number of the accumulators being equal to the number of sampling points and each accumulator combines the transform values of the same sampling point in any two consecutive symbols, thus obtaining an accumulated value for each sampling point; and a comparison module, which is electrically coupled with the plurality of accumulators, receives the accumulated values output from the accumulators, and compares the accumulated value to obtain a maximum accumulated value; wherein the sampling point with the maximum accumulated value is the optimal sampling point.