Timing error estimation method based on leader sequence

The invention discloses a timing error estimation method based on a leader sequence. The timing error estimation method based on the leader sequence comprises the steps of: (1), setting the decimation factor of a matched decimation filter to M=N-1; (2), for the output result of the matched decimation filter, performing sliding correlation operation of a known leader sequence; (3), judging output of the sliding correlation operation by a peak threshold detector, and marking the peak position; (4), setting the Fourier transform window length to the time length covering four Tsymbols by taking the marked peak position as the centre point, and, for the output value of the sliding correlation operation in the window length, performing Fourier butterfly transform; (5), for the output result of Fourier butterfly transform, performing frequency-domain phase operation; and (6), performing mapping output of the frequency-domain phase operation, and outputting a timing error estimation value. By means of the timing erro