浅海大孔径水平阵列差频匹配场定位研究  

Study on difference frequency matched field localization of large aperture horizontal array in shallow water

作　　者：刘哲[1,2] 朱飞龙 杨习山 LIU Zhe;ZHU Feilong;YANG Xishan(State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China;College of physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院声学研究所声场声信息国家重点实验室,北京100190 [2]中国科学院大学物理学院,北京100049

出　　处：《声学技术》2023年第5期603-608,共6页Technical Acoustics

基　　金：国家自然科学基金项目(12104481)。

摘　　要：随着阵列孔径的增大,常规匹配场在获得更高增益的同时也面临着对失配更加敏感的风险。文章通过对接收信号和拷贝声压同时进行差频自积处理,运用差频匹配场降低了匹配场对失配的敏感度,从而提高定位的稳健性。从简正波理论出发对比了差频匹配场和常规匹配场对阵形失配、环境失配的敏感性,分析差频匹配场应用于浅海大孔径水平阵列定位的优势。仿真和实验结果表明,差频匹配场方法有更好的定位稳健性。With the increase of array aperture,the conventional matched field processing is more sensitive to mismatch while obtaining a higher gain.In this paper,the received signal and the data-replica are processed by the difference frequency auto-product at the same time,and the difference frequency matched field processing is used to reduce the sensitivity to mismatch,so as to improve the robustness of the localization.Based on the normal-mode theory,the sensitivities of difference frequency matched field processing and conventional matched field processing to array mismatch and environment mismatch are compared,and the advantages of applying difference frequency matched field to acoustic source localization of large aperture horizontal array in shallow sea are analyzed.The simulation and experimental results show that the difference frequency matched field processing has better localization robustness.

关 键 词：差频匹配场 大孔径水平阵列 失配 稳健性 

分 类 号：TB533[理学—物理]