基于干涉相位的SAR有源欺骗干扰检测的性能分析  

Performance Analysis of SAR Active Deception Jamming Detection Based on Interferometric Phase

作　　者：李兆弘 徐华平[1] 段书航 李婧雯 LI Zhaohong;XU Huaping;DUAN Shuhang;LI Jingwen(School of Electronics and Information Engineering,Beihang University,Beijing 100191,China;Beijing Academy of Information Sciences,Beijing 100094,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]北京信息科学技术研究院,北京100094

出　　处：《雷达学报（中英文）》2024年第6期1327-1336,共10页Journal of Radars

基　　金：国家重点研发计划(2002YFB3902302);上海航天科技创新基金(SAST2022-048)。

摘　　要：对基于干涉相位的合成孔径雷达(SAR)有源欺骗干扰检测进行了性能分析。首先基于真实场景和虚假目标的斜距向局部条纹频率概率分布,推导了欺骗干扰检测概率的显式表达式。分别分析了垂直基线长度、干信比和局部条纹频率估计窗口尺寸3个因素对欺骗干扰检测概率(TPR)的影响。进而分析了在给定虚警概率(FPR)时,SAR系统能够达到检测概率要求时所需的垂直基线长度,为SAR系统的基线设计提供了理论依据。在现有低轨SAR参数条件下,要得到更大的干扰检测概率,所需垂直基线长度也越大,因此,在设计SAR系统的基线时,既要保证垂直基线足够大可满足检测概率的要求,还需要兼顾真实场景的相干系数,垂直基线不能太大,满足场景可进行干涉的条件。最后,对理论分析的结论进行了仿真验证。理论分析与实验结果表明:在虚警概率固定的情况下,一定范围内垂直基线长度越大/干信比越大/局部条纹频率估计窗口越大,则干扰检测概率越大。The performance of Synthetic Aperture Radar(SAR)active deception jamming detection based on the interferometric phase is analyzed.Based on the slant-range local fringe frequency probability distributions of a real scene and a false target,the influences of the vertical baseline length,jamming-to-signal ratio,and local fringe frequency estimation window size on the True Positive Rate(TPR)are analyzed.Furthermore,when the False Positive Rate(FPR)is known,the vertical baseline length required for the SAR system to meet the detection probability requirements is analyzed,thereby providing a theoretical basis for the baseline design of the SAR system.Finally,the result of theoretical analysis is verified by simulation.The theoretical analysis and experimental results show that,for a certain false alarm probability,as the vertical baseline length,jamming-tosignal ratio,or local fringe frequency estimation window value increases,the detection probability also increases.

关 键 词：合成孔径雷达 有源欺骗干扰 干扰检测 基线设计 检测性能分析 

分 类 号：TN974[电子电信—信号与信息处理] TN95[电子电信—信息与通信工程]