The adaptive digital beamforming technique in the space-polarization domain suppresses the interference with forming the coupling nulls of space and polarization domain. When there is the interference in mainlobe, it will cause serious mainlobe distortion, that the target detection suffers from. To overcome this problem and make radar cope with the complex multiple interferences scenarios, we propose a multiple mainlobe and/or sidelobe interferences suppression method for dual polarization array radar. Specifically, the proposed method consists of a signal preprocessing based on the proposed angle estimation with degree of polarization (DoP), and a filtering criterion based on the proposed linear constraint. The signal preprocessing provides the accurate estimated parameters of the interference, which contributes to the criterion for null-decoupling in the space-polarization domain of mainlobe. The pro-posedmethodcanreducethemainlobedistortioninthespace-polarization domain while suppressing the multiple mainlobe and/or sidelobe interferences. The effectiveness of the proposed method is verified by simulations.

中文翻译：

---

极化阵列空极化零解耦的多重干扰抑制

空间极化域中的自适应数字波束成形技术可抑制形成空间极化域的耦合零点的干扰。当主瓣中存在干扰时，将导致严重的主瓣失真，目标检测会受到影响。为了克服这个问题并使雷达能够应对复杂的多重干扰场景，我们提出了一种用于双极化阵列雷达的多重主瓣和/或旁瓣干扰抑制方法。具体地，所提出的方法包括：基于所提出的具有偏振度（DoP）的角度估计的信号预处理，以及基于所提出的线性约束的滤波准则。信号预处理可提供准确的干扰估计参数，这有助于在主瓣的空间极化域中实现零解耦的标准。提出的方法可以减少空间极化域中的主瓣失真，同时抑制多个主瓣和/或旁瓣干扰。仿真结果验证了所提方法的有效性。