Phase coded pulse radar signal direction finding method

The invention relates to a direction finding method of a phase-coded pulse radar signal, which comprises the following steps of: aiming at two-phase coded and four-phase coded signals, firstly, preprocessing a received signal by using a flat method or a quartic method, then, carrying out energy accumulation on frequency domain data of the received signal, and carrying out self-adaptive threshold detection processing to obtain a pulse starting moment and a pulse ending moment; in-pulse sampling data of original sampling broadband phase coding pulse signals corresponding to starting and ending moments are sent to a channelization detection processing module based on multiphase filtering and short-time Fourier transform, and signal amplitude-phase parameters and high-precision frequency information corresponding to a single code element are obtained; and finally, obtaining target angle information based on an optimal fuzzy multi-baseline interferometer direction finding algorithm. According to the invention, wea