基于有源转发器的移频干扰研究  

A Study of Shift-frequency Jamming Based on Active Radar Transponder

作　　者：刘桂坤 李亮 洪峻 明峰 LIU Guikun;LI Liang;HONG Jun;MING Feng(National Key Laboratory of Microwave Imaging Technology,Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院空天信息创新研究院微波成像技术国家级重点实验室,北京100190 [2]中国科学院大学电子电气与通信工程学院,北京100049

出　　处：《现代雷达》2025年第3期93-101,共9页Modern Radar

基　　金：国家自然科学基金资助项目(61571417)。

摘　　要：文中提出了一种基于有源转发器的合成孔径雷达移频干扰实现方法,首先推导了利用有源转发器实现回波信号中心频率移频的基本原理,接着分析了移频干扰的成像模型,进一步讨论了移频干扰成像特性的主要影响因素,同时结合峰值旁瓣比、积分旁瓣比和冲激响应宽度三项成像质量指标仿真分析了不同移频量情况下移频干扰信号的成像结果。分析结果表明,移频调制在干扰信号成像过程中引入了方位向匹配滤波调频率失配、距离徙动校正误差和距离向带宽损失等影响因素,导致移频干扰信号成像结果沿方位向逐渐展宽,进而由点目标变为方位向条带状目标。最后结合原始回波数据进行了干扰成像仿真实验,仿真结果验证了理论分析的正确性,可为基于有源转发器的移频干扰实现和应用提供依据。In this paper,an implementation method of shift-frequency jamming against synthetic aperture radar based on active radar transponder is proposed and the basic principle of center frequency shift of echo signal using active radar transponder is deduced firstly.Then,the theoretical model of shift-frequency jamming imaging is analyzed and the main influencing factors of shift-frequency jamming imaging characteristics are discussed based on the model.Meanwhile,the imaging results of jamming signals under different frequency shifts are simulated and analyzed combined with three imaging quality indexes of the peak sidelobe ratio,the integrated sidelobe ratio and the impulse response width.The analysis results show that shift-frequency modulation leads to the frequency modulation rate mismatch of azimuth matched filtering,the range cell migration correction error and the loss of range bandwidth,which will further cause the gradual broadening of the imaging result of shift-frequency jamming signal along the azimuth direction and finally from the point target to the azimuth strip target.The jamming imaging simulation experiments are performed with the original echo data and the obtained results verify the validity of theoretical model and provide a basis for the implementation and application of shift-frequency jamming based on active radar transponder.

关 键 词：合成孔径雷达 有源转发器 移频干扰 调频率失配 距离徙动校正 

分 类 号：TN958[电子电信—信号与信息处理]