基于两步空域滤波的GSM辐射源雷达干扰抑制

在基于全球移动通信（global system for mobile communication，GSM）信号的外辐射源雷达中，不仅有能量很强的基站直达波和强多径干扰，同时还存在大量的弱干扰，单独利用自适应波束形成和低副瓣技术很难完全有效抑制所有的干扰信号。提出一种基于两步空域滤波的GSM辐射源雷达干扰抑制方法，首先利用低副瓣技术对弱干扰进行抑制，然后利用一种稳健的自适应波束形成方法对残留的强干扰信号作进一步抑制，计算机仿真结果验证了本文方法的有效性。

Interference suppression for GSM based PBR using two-step spatial filtering

In the global system for mobile communication (GSM) based passive bistatic radar (PBR), there are not only strong interferences，which consist of direct signals from several base stations and strong multipath, but also a lot of weak interferences. So it is difficult to effectively suppress all interferences in GSM based PBR using only adaptive beamformer or low sidelobe technique. This paper proposes a method using two-step spatial filtering to suppress the interferences in GSM based PBR. First, the low sidelobe technique is used to suppress the weak interferences, and then the remained strong interferences are further suppressed by a robust adaptive beamformer. Finally, the performance of the proposed method is verified by simulation.