Aviation communication system base extension channel estimation method based on prior time delay information

The invention discloses an aviation communication system base extension channel estimation method based on prior time delay information, and the method comprises the following steps: expressing a to-be-estimated channel impulse response as a product of a base function and a base coefficient through a time-varying channel estimation model based on base extension, and carrying out the vectorizationoperation; performing Fourier transform to obtain a frequency domain channel impulse response matrix H, and substituting the frequency domain channel impulse response matrix H into a formula for performing Fourier transform on a time domain receiving signal to obtain a new receiving signal; decomposing the new receiving signal into a pilot frequency part and a data part, and simplifying the same;obtaining a pilot frequency data matrix according to simplification; synthesizing all the observation intervals to obtain a received signal; estimating the received signal to obtain channel estimation; estimating channel time