方位距离域最小二乘矩阵滤波器设计与分析

Design and Analysis of Least Square Direction-Range Domain Matrix Filter

针对在近场强干扰源条件下对弱信号源探测难的问题,提出了近场矩阵滤波干扰抑制方法。该方法基于聚焦波束形成原理,设计出最小二乘方位距离域矩阵滤波器,用于抑制近场强干扰,实现对弱目标源定位。另外对影响距离深度域最小二乘矩阵滤波器滤波性能的几个主要因素进行了研究,分析了这些因素与方位距离域矩阵滤波器性能的关系,一方面可以在设计一个适当的矩阵滤波器基础上对其通带和阻带误差进行研究,另一方面可以对其幅度响应图进行直观的观察和比较。

In order to solve the problem of detecting weak signal source in the near field strong interference, a near fie｜d matrix filter interference suppression method is proposed. Based on focus bear forming principle, then least square direction -range domain matrix filter is designed. It is used to suppress the near field strong interference and achieve the purpose of weak target source localization. In addition, several major affecting factors of filter are researched, and the rela- tionship between these factors and direction - range domain matrix filter are analyzed in this paper. On the one hand, the er- rors of pass - band and stop - band on the basis of designing a suitable filter is researched, on the other hand, the magnitude of response plans of matrix filter can be directly observed and comoared.