基于极化二元阵雷达的空域虚拟极化滤波算法  

The Spatial Virtual Polarization Filtering Algorithm Based on Dual Polarized Antenna Radar

作　　者：刘勇[1] 李永祯[1] 戴幻尧[1] 王雪松[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2010年第11期2746-2750,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60736006);国家自然科学基金青年科学基金(60802078)资助课题

摘　　要：极化滤波利用干扰信号和目标信号的极化状态差异,可有效抑制有源压制干扰,然而,现有极化雷达需要两路发射通道和接收通道,存在系统复杂、实现代价高等诸多困难。该文提出了一种新体制极化雷达模型极化二元阵雷达,该系统仅需一路发射通道和接收通道即可实现极化测量。基于极化二元阵天线的"空域极化特性",建立了有源压制干扰、目标回波的接收信号模型,研究了抑制有源压制干扰的空域虚拟极化滤波算法,仿真实验结果表明:对于窄带噪声调频干扰,信干比(SIR)改善因子能达到20dB以上。Based on polarization differences between jamming signal and target echo,polarization filter can combat active suppression jamming effectively.However,traditional polarization radars consist of two transmitting channels and receiving channels,facing such limits as system complexity,high realization cost.As a result,a novel polarized radar model named as dual polarized antenna radar is advanced.It can realize polarization measurement using only single transmitting channel and receiving channel.Based on spatial polarization characteristic of dual polarized antenna,received signal models of active suppression jamming and target echo are given,and spatial virtual polarization filtering algorithm to counter active suppression jamming is advanced.Following results can be obtained from simulations：For narrowband noise frequency modulation jamming,Signal Interference Ratio（SIR） improvement factor can be greater than 20 dB.

关 键 词：极化二元阵雷达 空域极化特性 极化滤波 有源压制干扰 改善因子 

分 类 号：TN974[电子电信—信号与信息处理]