相干两点源角欺骗干扰的极化鉴别方法研究  

Research on Polarization Discrimination Algorithm for Coherent Dual-source Angle Deception Interference

作　　者：李永祯[1] 胡万秋[1] 程旭[1] 宗志伟[1] 王雪松[1] 

机构地区：[1]国防科学技术大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073

出　　处：《兵工学报》2013年第9期1078-1083,共6页Acta Armamentarii

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：针对相干两点源角度欺骗干扰的对抗问题,利用目标与相干两点源干扰在主极化和交叉极化分量相对强度上的差异,提出了一种干扰鉴别的方法。建立单脉冲极化雷达的回波模型,分别推导得到了和、差波束中主极化、交叉极化4路信号。利用相干两点源干扰和雷达目标在雷达测角系统中不同极化通道响应函数的不同,构造了鉴别相干两点源角度欺骗干扰与雷达目标的鉴别统计量。结合典型弹头类和飞机类目标测量数据的统计分析及对相干两点源干扰的建模仿真,给出了满足一定置信度水平的鉴别门限。暗室测量数据和计算机仿真结果证实了算法的正确性和有效性。A method which discriminates the coherent dual-source angle deception interference by using the relative difference between the co-polarization and cross-polarization components of target and interfer- ence is proposed. A model of mono-pulse polarization radar echo is established, and the co-polarization and cross-polarization echoes of the sum and difference beams are obtained. A statistic to distinguish the existence of coherent dual-source interference is constructed by using the difference between the interfer- ence and the radar target response function in the different polarization channels. A certain confidence level threshold is given according to the measured data of typical warhead and aircraft target and the simu- lation of coherent dual-source interference. The measured data obtained in darkroom and the computer simulation show that the algorithm is feasible and valid.

关 键 词：信息处理技术 雷达跟踪 相干两点源 角度欺骗 极化识别 

分 类 号：TN953[电子电信—信号与信息处理]