高分辨雷达角闪烁抑制方法探讨

角闪烁是雷达测量近距离目标时的主要误差。要提高角度测量和角跟踪精度,就必须对角闪烁进行抑制,距离高分辨为抑制角闪烁提供了有效途径。分析了基于距离高分辨的单脉冲测角方法;并在此基础上提出了基于目标几何中心的角度信息处理方法。与幅度加权处理方法不同,该方法利用散射点的距离信息对目标几何中心进行准确估计,从而提高角度测量精度、抑制角闪烁。经仿真实验分析表明,几何中心法可以有效提高测角精度,表现出具有更好的角闪烁抑制性能。

Discussion on Angular Glint Suppressing Method Based on High Resolution Radar

Angular glint is a major error when radar measures the close target. To improve the accuracy of angle measurement and tracking, it is necessary to suppress the glint. Fortunately high range resolution provides an effective way to suppress the glint. This paper analyzes monopulse estimation algorithm based on high range resolution, then proposes angle information processing method based on geometric center of the target. Different from the amplitude weighting method, this new method uses distance information of the scattering point to estimate the geometric center of the target accurately, thus improving the accuracy of the angle and suppress the glint. The simulation results show that the geometric center method can effectively improve the angular accuracy and get a better performance of suppressing the glint.