基于数字波束形成的合成孔径雷达干扰抑制方案

Jam nulling scheme for SAR based on digital beam forming

提出一种基于数字波束形成(DBF)的机载SAR自适应干扰抑制方案.该方案根据干扰的方向,在成像的过程中,实时地调整接收波束方向图,使得主波束对准成像区域,同时在干扰方向形成零陷.为了在成像过程中,只对波束进行有限次调整,采用了宽零陷波束形成算法.并对该方案的性能进行分析,仿真表明了该方案的可行性和有效性.

This paper presents a new jam nulling scheme for airborne synthetic aperture radar using digital beam forming.This scheme adaptively adjusts the weight vector of each receiving channel to form the beam pattern which receives the radar echo without distortion and nulls the interference.An optimized sector nulling technique is introduced for reducing the times of weight adjusting.Further more,the performance analysis of this scheme is given.Simulation results show its efficiency and feasibility.