A Study on Anti-jamming of Array Radar Based on Random Phase Modulation

In order to improve the anti-jamming ability of array radar, random phase modulation is used to increase the non correlation between the transmitted signals of each burst to realize the non plane wavefront of the transmitted signal. Starting from the principle of transmitting signal, the advantages of random phase modulation for detecting signal and anti-jamming are explored, and the spatialtemporal correlation of array antenna is studied. The mathematical model of transmitted signal based on random phase modulation is established to improve the anti-jamming ability of detection signal. Simulation results show that when the random modulation range reaches -π/3,π/3, the target and the environment signal can be effectively distinguished, and the suppression of the ambient clutter can reach 3 dB, while the further increase of the modulation range can not significantly improve the suppression of clutter.