Log-normal分布杂波背景下有序统计恒虚警检测器性能分析  

Performance of Ordered Statistic CFAR Detector Under Log-normal Distributed Clutter

作　　者：胡文琳[1] 王永良[2] 王首勇[2] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073 [2]空军雷达学院武器系统与兵器运用实验室,武汉430019

出　　处：《电子与信息学报》2007年第3期517-520,共4页Journal of Electronics & Information Technology

基　　金：武器装备预研基金项目(51431040105JB4901);全国高校优秀青年教师教学科研奖励计划(TRAPOYT)资助课题

摘　　要：该文证明了在形状参数已知的均匀对数-正态(Log-normal)杂波背景下有序统计恒虚警(OS-CFAR)检测器能保持恒虚警的特性,导出了该背景下OS-CFAR检测器对非起伏目标的检测性能表达式和平均判决阈值(ADT)表达式。最后用数值方法讨论了最佳序值的选取以及OS-CFAR检测器在取不同参考单元数时相对于理想CFAR的信杂比损失。The property that the ordered statistics CFAR（OS-CFAR） detector can obtain constant false Marm rate under homogeneous Log-normal distributed clutter background is proved in this paper, when the shape parameter of probability density function is known. Both the detection performance expressions with non-fluctuating target and the ADT （average decision threshold） expressions of the OS-CFAR detector are derived. Finally, the optimal order value and the signal-clutter-ratio losses compared with ideal CFAR of the OS-CFAR detector are discussed by numerical method when the number of reference cells is taken different values.

关 键 词：雷达 Log—normal分布杂波 OS-CFAR CFAR损失 

分 类 号：TN957.51[电子电信—信号与信息处理]