抑制运动强干扰的稳健波束域目标方位估计方法

为了减小来自旁瓣区快速运动的强干扰对波束域高分辨方位估计方法的影响,提出一种稳健的波束域高分辨方位估计方法。该方法在形成多波束时,将稳健自适应波束形成与零陷扩宽技术相结合,有效地抑制了运动强干扰所造成的快拍失效和扫描方向误差引起的自适应波束图畸变,从而保证波束域方法能准确地估计目标方位。仿真结果验证了该方法的有效性。

Beamspace DOA estimation algorithms with robustness against signal steering vector errors and interference nonstationarity

Algorithms for beamspace DOA estimation are all based on the beam outputs, and the beamformers play an important role in providing high quality beam output data for further processing. In this paper, we use a robust adaptive beamformer combined with a null-broadening technique to apply to the element outputs. It can effectively suppress strong fast-moving interferers outside the beam coverage region and overcome the beampattern distortion problem due to array steering vector errors. Performance of beamspace MUSIC using robust beamformers against fast moving interferer is studied via computer simulation for uniform linear array. Simulation results show that the proposed scheme has good spatial resolution and improved performance in detecting weak stationary signals.