极化信息在雷达目标检测中的得益分析  

A Study on Polarization Gain for Radar Targets Detection

作　　者：李永祯[1,2] 程旭[1,2] 李棉全[1,2] 王雪松[1,2] 

机构地区：[1]电子信息系统复杂电磁环境效应国家重点实验室,长沙410073 [2]国防科技大学电子科学与工程学院,长沙410073

出　　处：《现代雷达》2013年第2期35-39,共5页Modern Radar

基　　金：国家自然科学基金重点项目(60736006);国家自然科学基金青年科学基金项目(60802078)

摘　　要：极化是电磁波的基本属性之一,目标在反射电磁波的同时会改变电磁波的极化状态,其变极化效应蕴含了目标的特征信息,充分利用极化信息可以有效提高雷达系统的反杂波、反隐身、目标识别和抗干扰性能。文中针对雷达单极化、双极化和全极化测量体制,从目标的散射结构出发分析了极化信息对雷达目标检测信噪比的改善程度,为雷达极化方式和极化测量体制的选择、极化检测算法的优化设计等应用提供了有益参考和理论指导。As the essential property of electromagnetic wave, polarization state of the target will be changed when the wave is reflec- ted. The characteristic information of the target is implied by its depolarization effect. By making sufficiently use of the polarization characteristics of the target, the capability of anti-jamming, anti-stealth and recognition of radar will be enhanced efficiently. The polarization gain of signal-noise-rate（SNR） of radar target detection with different scattering mechanism in instance of mono-polari- zation, dual-polarization and fully-polarization radar has been analyzed in this paper. The research results are useful for the choice of radar polarization mode and the optimization of radar detection algorithm.

关 键 词：雷达目标 极化检测 信噪比 极化得益 

分 类 号：TN957.51[电子电信—信号与信息处理]