基于极化分解的舰船和角反射器鉴别方法

使用角反射器是舰船电子对抗中常用的一种无源干扰方式,它在时域、频域和空域上与舰船的雷达回波都没有显著差异,因此传统单极化雷达很难有效鉴别舰船和角反射器。分析了舰船和角反射器在极化回波上的特性差异,并基于Krogager极化分解提取了单频点和多频点情况下的特征矢量,通过支持矢量机对舰船和角反射器进行了鉴别。电磁计算数据表明：该方法可以较好地对二者进行鉴别,且对单角反射器和阵列角反射器都有效,为解决舰船和角反射器的鉴别问题提供了一个可行的思路。

Discrimination Method of Ship and Corner Reflector Based on Polarization Decomposition

Using corner reflectors is a common passive jamming mode in shipboard electronic countermeasure.The corner reflectors have no obvious difference with the radar echo of ships in time,frequency and space domain,so the traditional single polarization radar has difficulty to discriminate the ship and corner reflector.This paper analyzes the characteristics difference of polarization echo between ships and corner reflectors,abstracts the characteristic vectors in cases of single frequency point and multiple frequency points based on Krogager polarization decomposition,and then makes a discrimination to the ship and corner reflector by support vector machine（SVM）.The electromagnetic calculation data show that：the method proposed in this paper can discriminate the ship from corner reflectors well,furthermore,it is valid for both single corner reflector and array corner reflector,which presents a feasible method for discriminating ship from corner reflector.