有源诱饵的双极化识别

Dual Polarization Identification of Active Decoys

针对双极化测量体制毫米波雷达,研究了有源干扰诱饵的极化识别方法。首先介绍了双极化技术原理,然后详细分析了典型雷达目标和各种极化有源诱饵的双极化回波特性,引入能够有效表征有源诱饵和雷达目标极化特性差异的同极化比和极化起伏等特征,并提出基于自适应恒虚警阈值的目标识别方法。最后通过组建双极化试验雷达系统采集并分析了建筑物和垂直极化、水平极化、左旋圆极化有源诱饵的回波数据,实验结果证明了有源诱饵的双极化识别方法的可行性和有效性。

For millimeter wave（MMW） radar system of dual polarization,this paper presents a polarizationidentification method of active jamming decoys. Firstly,the principle of dual polarization technique is intro-duced,and the characteristics of dual polarization echo of the representative radar targets and various activedecoys are analyzed in detail. Secondly,some effective characteristics of active decoys and radar targets areobtained to express their polarization characteristics differences,such as polarization ratio and polarizationundulation. Thirdly,an identification method based on self-adaptive constant false alarm rate（CFAR）threshold is proposed. Finally,a dual polarization test radar system is constructed to gather and analyze theexperimentation echo data of buildings,vertical polarization,horizontal polarization and left-handed circularpolarization active decoys,and the experimentation results prove that the dual polarization identificationmethod of active decoys is feasible and effective.