密集多假目标干扰对CFAR检测影响分析  

Impact Analysis of CFAR Detection for Dense Multiple False Targets Jamming

作　　者：杨勇[1] 冯德军[1] 肖顺平[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《现代防御技术》2013年第1期126-130,153,共6页Modern Defence Technology

基　　金：国家自然科学基金(61072119);国防科技大学优秀研究生创新资助项目(B110406);湖南省科研创新项目(CX2011B021)

摘　　要：分析了密集多假目标干扰对雷达CFAR检测的影响。首先介绍了密集多假目标产生机理,给出了3种不同功率调制方式的密集多假目标干扰产生方法,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,分别分析了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3种密集多假目标干扰方式下的检测代价。仿真结果表明:密集多假目标干扰环境下,检测代价受假目标间距影响明显,受假目标干扰功率影响较小,雷达采用单元平均恒虚警检测器付出的检测代价较采用有序恒虚警检测器、剔除和平均恒虚警检测器付出的检测代价小。The impact of dense multiple false targets jamming on radar constant false alarm rate detection is analyzed. Firstly, the generation principle of dense multiple false targets is introduced. Then, generation methods of dense multiple false targets jamming with three types of power modulation mode are given. Based on this, the detection cost caused by the false alarm and false dismissal in a search period of radar is chosen as the criteria of detection performance. The detection costs of cell averaging-constant false alarm rate （CA-CFAR）, order statistic-constant false alarm rate（ OS-CFAR）, censored mean level- constant false alarm rate（CML-CFAR） under three types of dense multiple false targets jamming environments are analyzed. The simulation results show that detection cost is sensitive to the interval of false targets, and has little relationship with the power of false targets when dense multiple false targets exist. The detection cost of radar adopting CA-CFAR detector is lower than that of radar adopting OS-CFAR and CML-CFAR detectors.

关 键 词：密集多假目标 干扰 恒虚警检测 检测代价 

分 类 号：TN95[电子电信—信号与信息处理]