分布式阵列雷达波束-极化域联合主瓣干扰抑制方法

Beamspace-polarization Domain Main-lobe Jamming Suppression Method for Distributed Array Radar

分布式阵列雷达可以形成等效大口径,具有空域高分辨特性,但主瓣干扰会对其性能造成严重影响。针对这一问题,提出一种适用于分布式主-辅联合阵列雷达的波束-极化域联合主瓣干扰抑制方法。首先,利用分布式主阵列与辅助阵列极化特性构造空-极化导向矢量;然后,根据预估角度构造目标方向和干扰方向极化正交波束;最后,利用正交波束求取协方差矩阵,并结合空-极化导向矢量计算MSINR权值,进而对主瓣干扰进行抑制。通过计算机仿真对所提方法的有效性进行了验证。

Distributed array radar can form equivalent large aperture and have high spatial resolution, but the mainlobe jamming will seriously affect its performance. To solve this problem, a beamspace-polarization domain mainlobe jamming suppression method for main-auxiliary joint distributed array radar is proposed in this paper. Firstly, the space-polarization steering vector is constructed by using the polarization characteristics of distributed main array and auxiliary array;According to the estimated jamming direction, the polarization orthogonal beams in the target direction and jamming direction are constructed;Finally, the covariance matrix is obtained by using the orthogonal beam, and the MSINR weight is calculated by using the space-polarization steering vector, so as to suppress the mainlobe jamming. The effectiveness of the proposed method is verified by computer simulation.