1. A method for timing control of channel estimation, comprising: receiving a received signal from a transmitting end through a channel, wherein the channel has multiple delay paths; searching a delay time of each of the delay paths of the channel and a channel power of each of the delay paths of the channel to obtain a channel power-delay profile; providing a channel estimation window; sequentially shifting a position of the channel estimation window in the channel power-delay profile in a specific time interval to obtain a plurality of candidate segments; calculating a metric corresponding to each of the candidate segments according to a number of the delay paths and the channel power of the delay paths extracted from each of the candidate segments in the channel power-delay profile; among all the metrics corresponding to every candidate segment, finding out an optimal segment with the maximum metric; and deciding a timing of channel estimation based on the optimal segment.