Pareto Ⅱ型分布混响中距离扩展目标CFAR检测  

CFAR Detection of Range-Extended Target in Pareto Ⅱ Reverberation

作　　者：罗海力 徐达 陈模江[2] 郝程鹏[2] LUO Hai-li;XU Da;CHEN Mo-jiang;HAO Cheng-peng(School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院大学电子电气与通信工程学院,北京100049 [2]中国科学院声学研究所,北京100190

出　　处：《水下无人系统学报》2020年第1期18-23,共6页Journal of Unmanned Undersea Systems

基　　金：国家自然科学基金青年基金(61701489)资助课题;国家自然科学基金(61571434)资助课题

摘　　要：随着现代声呐距离分辨力的提高,每个空间处理单元内的有效散射体数量大大减少,混响分布模型不再服从中心极限定理,而目标回波也呈现出占据连续多个距离单元的现象,如果仍然采用传统声呐所具有的高斯分布混响模型以及点目标模型,高分辨声呐系统的检测性能将大大降低。文中研究了ParetoIⅡ型分布混响下基于几何平均恒虚警率检测器的距离扩展目标检测方法,利用Monte-Carlo方法进行仿真,分析了二进制积累、模糊代数积及模糊代数和3种方法的检测性能。仿真结果表明,ParetoⅡ型分布混响下3种检测方法能够有效地对距离扩展目标进行检测,其中2种模糊逻辑检测方法的检测性能优于二进制积累方法。在多目标干扰环境下,模糊代数和较其他方法检测性能更好。文中研究可为有效改善高分辨声呐的检测性能提供参考。With the improvement of modern sonar range resolution,the number of effective scatters in each space pro-cessing unit is greatly reduced,the reverberation distribution model is no longer subject to the central limit theorem,and the target echo occupies a continuous number of distance units.If the Gaussian reverberation model and the model of point target are still used in this case,the detection performance of the high-resolution sonar system would be greatly reduced.This paper discusses the detection method for the range-extended target in Pareto II reverberation based on geometric mean-constant false alarm rate(GM-CFAR),and analyzes the detection performances of the binary integrator,the fuzzy algebraic product integrator,and the fuzzy algebraic sum integrator through the Monte-Carlo method.Simula-tion results show that the three integrators can effectively detect range-extended targets in Pareto II reverberation,and the detection performances of these two fuzzy logic integrators are better than that of the binary integrator.In addition,the fuzzy algebraic sum integrator works better under multiple jamming targets background than the other two integra-tors.This research may provide a reference for improving the detection performance of high resolution sonar.

关 键 词：声呐检测 ParetoⅡ型分布混响 距离扩展目标 几何平均恒虚警率 模糊逻辑 

分 类 号：U666.7[交通运输工程—船舶及航道工程] O427.2[交通运输工程—船舶与海洋工程]