一种修正k值的OS-CFAR检测器  

An OS-CFAR detector with corrected k values

作　　者：秦天慈 王中训[1] 黄勇 刘宁波 丁昊 Qin Tianci;Wang Zhongxun;Huang Yong;Liu Ningbo;Ding Hao(School of Physics and Electronic Information,Yantai University,Yantai 264005,China;Navy Aviation University,Yantai 264001,China)

机构地区：[1]烟台大学物理与电子信息学院,山东烟台264005 [2]海军航空大学,山东烟台264001

出　　处：《电子技术应用》2022年第9期1-5,38,共6页Application of Electronic Technique

基　　金：国家自然科学基金(61871392,62101583)。

摘　　要：OS-CFAR(Ordered Statistics)检测器的k值存在着取值方法不确定的缺陷。考虑到实际工程应用中的目标回波信号,在经过脉压匹配滤波器后,输出是Sa函数钟型包络,因此在选取k值时,可能会发生背景杂波估计取在干扰目标的能量单元中,使杂波估计偏大导致目标漏检。提出一种修正k值方法,在OS-CFAR检测器选择k值时将目标回波为扩展目标考虑在内,令k的取值更加准确。通过详细的仿真实验,发现了参考滑窗内有无干扰目标两种条件下OS-CFAR检测器性能随k值变化的不同规律,并证明修正k值的OS-CFAR检测器在多目标环境中有更好的性能。The k value of OS-CFAR detector has the defect of uncertain value taking method.Considering the target echo signal in practical engineering application,after passing through the pulse compression matched filter,the output is the shape of SA function bell envelope.Therefore,when the k value is selected,the background clutter estimation may be taken into the energy unit of the interfering target,which makes the clutter estimation too large and leads to missed detection of the target.In this paper,a modified k-value method is proposed.When the OS-CFAR detector selects k-value,the target echo is considered as an extended target,so that the value of k is more accurate.Through detailed simulation experiments,it is found that the performance of OS-CFAR detector changes with k value under the two conditions of whether there are interfering targets in the reference sliding window,and it is proved that the OS-CFAR detector with modified k value has better performance in multi-target environment.

关 键 词：雷达 目标检测 恒虚警检测器 

分 类 号：TN951[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]