半仿真方位高分辨后置处理方法

Study on the Half-Simulation Azimuth High Resolution Post Processing Method

MVDR自适应波束形成可获得良好的目标方位估计性能,但其方位分辨力仍受限于阵列孔径。为进一步提高目标方位分辨性能,在MVDR自适应波束输出的基础上,提出了一种高分辨后置处理方法。在两目标方位不可分时,仿真构造两个目标的阵列输出空间方位谱,通过搜索两目标的方位和幅值,与真实数据的空间方位谱输出作匹配处理,从而获得目标的方位估计。实验室仿真及海试数据处理验证了该方法的有效性。

MVDR adaptive beamforming method has good DOA estimation performance,but its azimuth resolution is still limited by array aperture.In order to further improve the target azimuth resolution ability,a high-resolution post processing method is proposed based on beams output by MVDR.When two targets can not be distinguished,constructing array output spatial azimuth spectrum of the two targets by simulation,making match process between the spectrum through searching for the azimuth and amplitude of the two targets and real data spatial azimuth spectrum,thereby the target azimuth can be estimated.Laboratory simulation and sea trial data processing verify the effectiveness of the method.