双基地机载雷达杂波和主瓣压制干扰抑制方法  

Clutter and main-lobe suppression jamming suppression method for bistatic airborne radar

作　　者：王安安 谢文冲[1] 陈威 熊元燚 王永良[1] WANG An’an;XIE Wenchong;CHEN Wei;XIONG Yuanyi;WANG Yongliang(Radar Weapon Application Engineering Key Research Laboratory,Air Force Early Warning Academy,Wuhan 430019,China;School of Electronic Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]空军预警学院雷达兵器运用工程重点实验室,湖北武汉430019 [2]国防科技大学电子科学学院,湖南长沙410073

出　　处：《系统工程与电子技术》2023年第3期699-707,共9页Systems Engineering and Electronics

基　　金：国防科技卓越青年科学基金(2019-JCJQ-ZQ-006)资助课题。

摘　　要：当干扰从雷达波束主瓣进入时,传统的空域抗干扰方法不仅无法抑制主瓣干扰,还会引发主瓣畸变、旁瓣抬升等问题,严重影响机载雷达目标检测性能。针对该问题,提出了一种基于双基地配置的机载雷达杂波和主瓣压制干扰抑制方法。该方法首先针对主、辅雷达分别形成多个相邻空域波束;然后,对波束形成后的数据进行脉冲多普勒(pulse Doppler,PD)处理,并在距离-多普勒域对主、辅雷达的干扰信号进行配对处理。在此基础上,在主、辅雷达对应的多普勒通道通过时域自适应滤波抑制干扰;最后,联合相邻波束的数据通过降维空时自适应处理(reduced-dimension space-time adaptive processing,STAP)抑制剩余的杂波。仿真结果表明,所提方法能够有效抑制杂波和主瓣压制干扰,与传统采样矩阵求逆(sample matrix inversion,SMI)方法和局域联合处理(joint domain localized,JDL)方法相比,对信干噪比性能分别改善了约20.6 dB和21.5 dB。When the jamming enters from the main-lobe of the beam,the traditional spatial anti-jamming method not only cannot suppress the main-lobe jamming,but also causes the problem of main-lobe distortion and side-lobe elevation,which seriously affects the target detection performance of airborne radar.Aiming at this problem,an airborne radar clutter and main-lobe suppression jamming suppression method based on bistatic configuration is proposed.This method firstly forms multiple adjacent spatial beams for the primary and auxiliary radars respectively,then performs pulse Doppler(PD)processing on the beamformed data,and matches the jamming signals of the primary and auxiliary radars in the range-Doppler domain.On this basis,the Doppler channels corresponding to the primary and auxiliary radars are used to suppress the jamming through time-domain adaptive filtering.Finally,the data of adjacent beams are combined to suppress the residual clutter through reduced-dimension space-time adaptive processing(STAP).The simulation results show that the proposed method can effectively suppress the clutter and main-lobe jamming.Compared with the traditional sample matrix inversion(SMI)method and the joint domain localized(JDL)method,the signal to interference plus noise ratio performance is improved by about 20.6 dB and 21.5 dB respectively.

关 键 词：双基地机载雷达 主瓣压制干扰 杂波抑制 干扰配对 

分 类 号：TN957[电子电信—信号与信息处理]