一种极化和频率捷变主动雷达信号处理技术  

Signal Processing Technique for Active Radar with Polarization and Frequency Agility

作　　者：宋立众[1] 吴群[1] 

机构地区：[1]哈尔滨工业大学电子科学与技术博士后科研流动站,黑龙江哈尔滨150001

出　　处：《南京理工大学学报》2010年第5期668-674,共7页Journal of Nanjing University of Science and Technology

基　　金：中国博士后科学基金(20070420856)

摘　　要：为提高现代制导雷达的电子战性能,该文提出了一种频率和极化捷变的雷达系统,探讨了相应的信号处理技术。阐述了极化捷变单脉冲雷达系统的原理和结构,介绍了2种极化和频率捷变雷达发射信号波形,根据雷达目标的极化散射理论,建立了相应的全极化回波信号模型。在回波信号处理过程中,对回波信号进行正交解调和采样,经过目标和干扰信号的极化参数估值、极化匹配计算,实现了对目标的有效检测,最后利用可靠的目标信号数据进行单脉冲测角和跟踪。该文还探讨了极化捷变体制和频率捷变体制之间的兼容性问题。理论分析和仿真实验表明,当目标和干扰在极化域可分辨时,极化捷变技术可提高传统频率捷变雷达的抗干扰能力。In order to improve the performances of the modern guidance radars in electronic warfares,this paper proposes a kind of radar system with frequency and polarization agility and discusses the corresponding signal processing technique.The theorem and structure of mono-pulse radar with polarization agility are discussed,two kinds of transmitted signals with frequency and polarization agility are introduced and the full polarization echo signal model is established based on the polarization scattering theory of a radar target.In the signal processing,the echo signal is orthogonally demodulated and sampled;the effective target detection is realized through the polarization parameter estimation of the target and interferences and polarization matching calculation;the target angle measurement and tracking using the reliable target signal data is finished.The compatibility of the polarization agility and frequency agility is discussed in this paper.The results of theoretical analysis and simulation experiment reveal that the polarization agility technique can improve the anti-jamming ability of the traditional frequency agility radar when the target can be distinguished from the interferences in the polarization domain.

关 键 词：制导雷达 单脉冲雷达 极化捷变 频率捷变 

分 类 号：TN974[电子电信—信号与信息处理]