间歇采样转发假目标对CFAR检测影响分析  

Impact analysis of CFAR detection for active decoy using interrupted-sampling repeater

作　　者：冯德军[1] 杨勇[1] 徐乐涛[1] 

机构地区：[1]国防科技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：《国防科技大学学报》2016年第1期63-68,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61372170)

摘　　要：分析间歇采样转发形成的假目标干扰对雷达CFAR检测的影响和间歇采样转发假目标生成机理,给出间歇采样转发假目标产生方法。在此基础上,以雷达一次搜索周期内虚警、漏警造成的检测代价作为检测性能指标,分别分析单元平均恒虚警检测器、有序恒虚警检测器、剔除和平均恒虚警检测器在间歇采样转发假目标干扰下的检测代价。着重分析间歇采样转发干扰关键参数对检测代价的影响。仿真结果表明,间歇采样转发产生的多个假目标显著提高了雷达的检测代价,检测代价受转发占空比、转发功率的影响较大,而受转发频率影响较小。在三种恒虚警检测器的对比中,剔除和平均恒虚警检测器相对于另两种检测器的检测代价更大些。The impact of ISRJ（ Interrupted-Sampling Repeater Jamming） on radar constant false alarm rate detection and the generation principle of false target using ISRJ were analyzed,and then generation methods of false targets jamming were given. On this basis,the detection cost caused by the false alarm and false dismissal in a search period of radar was chosen as the criteria of detection performance. The detection costs of CA-CFAR,OS-CFAR,CMLD-CFAR detectors for active decoy using IRSJ were analyzed,especially the influence of key factors of ISRJ on detection costs. Simulation result shows that the detection costs will increase remarkably for the active decoy from IRSJ and it is sensitive to the jammer power and duty ratios,but have little relationship to the repeating frequency. Among the three detectors,the detection costs of radar CMLDCFAR detectors are higher than those of the OS-CFAR and the CA-CFAR.

关 键 词：间歇采样 转发干扰 假目标 恒虚警检测 检测代价 

分 类 号：TN95[电子电信—信号与信息处理]