Satellite-borne AIS collision signal processing method and system based on array antenna

The invention discloses a satellite-borne AIS collision signal processing method and system based on an array antenna. The method comprises the following steps of: acquiring each path of data sequence received by an array antenna, performing channel equalization processing on each path of data sequence to form a fixed pointing beam data sequence, performing FFT (Fast Fourier Transform) on each path of data sequence to obtain each path of frequency domain data sequence, and calculating a quantity estimated value, a pitch angle estimated value and an azimuth angle estimated value theta; enhancing the azimuth angle receiving signal obtained by estimation by using the optimal weight matrix W to obtain an enhanced beam data sequence, and inhibiting receiving signals from other directions; demodulating the fixed directional beam data sequence to obtain a first group of AIS message data, and demodulating the enhanced beam data sequence to obtain a second group of AIS message data; and obtaining final AIS message inf