基于随动天线的雷达主瓣干扰抑制

Mainlobe Jamming Suppression Based on Accompanying Antenna

针对雷达系统主瓣干扰问题,本文提出了一种基于随动天线的干扰抑制算法。假设雷达站配置了一个主天线和一个随动天线,其中随动天线仅配备了接收机。主瓣干扰抑制算法是分两步进行的,第一步是基于特征值分解和特征子空间,完成初步干扰对消;第二步是将预处理后的随动天线的信号作为参考信号完成二次对消。通过仿真实验比较了本文提出的算法和已有算法的性能,结果显示本文提出的基于随动天线的算法可有效地对抗多个主瓣干扰源。

Aiming at the mainlobe jamming problem faced by radar systems,a jamming suppression algorithm based on an accompanying antenna is proposed in this paper. It is assumed that there are two antennas collocated in the radar station,i. e.,one main antenna and one accompanying antenna,and the later one only has receiving function. The proposed suppression algorithm includes two steps,first of which is primary jamming cancellation based on eigenvalue decomposition and eigen-subspace,while the second step is secondary cancellation using the pre-processed accompanying antenna signals as reference signal. Numerical results are presented to compare the performance between the proposed algorithm and some existing algorithms,which show that the proposed algorithm can suppress multiple mainlobe jamming sources effectively.