A wireless communication method includes: receiving a wireless signal including a plurality of frames, wherein each of the plurality of frames includes a plurality of sub-frames and a current frame is initially a first one of the frames; a) performing a correlation calculation between each of the sub-frames of the current frame and each a plurality of reference signals to generate a plurality of current correlation values; b) respectively accumulating the current correlation values with previous correlation values to generate cumulative values respectively corresponding to the plurality of sub-frames of the current frame; determining whether an effective synchronization signal is detected, based on the current cumulative values; and setting the current frame to a next one of the frames, setting the previous correlational values to the current correlation values, and determining whether to resume to step a) based on the determination as to whether the effective synchronization signal is detected.