基于粒子采样投影的雷达低旁瓣复合波形设计

Non-cooperative unmanned aerial vehicles are often highly maneuverable and easily sheltered by buildings when probing and detecting, and they usually posses the ability of signal interception, which brings severe challenge to traditional radar. To tackle this problem, this paper proposes a method based on particles sampling projection (PSP) to design constant-modulus waveforms with local low sidelobe and low intercept probability. Firstly, the randomness of chaotic phase coding is used to construct the composite waveform to enhance the performance of low interception. Secondly, the mathematical model of low range sidelobes is introduced and transformed into a multi-variable alternating norm-optimization problem. Furthermore, the particles-set synchronous projection and sampling updating mechanism are both constructed, based on the particle filter sampling thinking and alternating projection framework. Finally, simulation results show that the proposed algorithm has higher efficiency, lower range sidelobes, low probability of interception and also with Doppler tolerance, which has significant advantages over popular ones.