舰船与箔条的双极化统计特性研究  

Dual-polarization statistic characteristic of ship and chaff

作　　者：来庆福[1] 李金梁[1] 冯德军[1] 王雪松[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《电波科学学报》2010年第6期1079-1084,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金项目(61072119)

摘　　要：箔条干扰是反舰导弹末制导雷达面临的主要威胁,利用统计特性差异对箔条和舰船进行鉴别是末制导雷达抗箔条干扰的主要途径之一。将不同极化通道的箔条干扰和舰船目标的RCS分别建模为SwerlingⅡ模型和Swerling Ⅳ模型,推导得到二者的极化比统计分布,利用极化比与极化角的关系,通过变量替换得到二者极化角的统计分布,并进行了理论分析和对比,最后通过实测数据验证了理论推导的正确性。结果表明:箔条与舰船的极化角均值和标准差可作为目标识别的可靠特征量。Chaff is the main threat against radar seeker of anti-ship missile.The difference of statistical property between chaff and ship is a useful discrimination parameter which can be used as the major countermeasures of chaff jamming.The RCS of chaff and ship target in different polarization channel is modeled as Swerling Ⅱ and Swerling Ⅳ,respectively.Their polarization ratio statistical distribution is then derived.By considering the relationship between polarization ratio and polarization angle,variable substitution is used to obtain the statistical distribution analytic expression.The theoretical analysis and comparing is tested.The theoretical deduction and experimental result of field test data reveal the effectiveness of the algorithm.This research can provide reliable character for discrimination between chaff and ship.

关 键 词：舰船 箔条 双极化 极化比 极化角 

分 类 号：TN95[电子电信—信号与信息处理]