深海海底水平阵直达声区宽带声源干涉结构匹配定位  

Broadband source localization by matching interference structure in the direct zone of deep water using a bottom-mounted horizontal array

作　　者：翟肇锴 李风华[1] 张波 翟铎 胡传兴 ZHAI Zhaokai;LI Fenghua;ZHANG Bo;ZHAI Duo;HU Chuanxing(State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049)

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,北京100049

出　　处：《声学学报》2025年第2期433-444,共12页Acta Acustica

基　　金：国家自然科学基金项目(11974017);中国科学院青年促进会项目(2017028)资助。

摘　　要：针对深海直达声区宽带声源定位问题,在海底水平阵列接收条件下,提出了一种干涉结构频率凹点匹配的声源定位方法。该方法利用接收阵列纵向孔径获得频率–距离干涉条纹,并利用增强的一维干涉结构提取干涉频率凹点。在引入先验估计距离的基础上,通过匹配固定带宽内干涉频率凹点数量和数值进行目标定位。仿真结果表明,该方法不明显依赖于信号频谱的平坦程度,在信号频谱不平坦条件下,所提方法对信噪比的宽容度较匹配场处理和一维干涉结构匹配定位方法高约5 dB。利用某深海试验数据进行验证,多组实验信号证明了所提方法对频谱不平坦信号具有较好定位效果。A method is proposed for estimating the position of a broadband source in the direct zone of deep water based on a bottom-mounted horizontal array.The method involves matching frequency valleys of the interference structure.First,the longitudinal aperture of the horizontal array is used to obtain the interference fringes,and then the frequency valleys are extracted from the enhanced 1-D interference structure.By incorporating the prior estimated source range,the source depth can be estimated by matching the number and frequency values of valleys.Simulation results demonstrate the robustness of the method against signal spectrum flatness,showing approximately 5 dB higher tolerance to signal-to-noise ratio compared to conventional matched field processing and 1-D interference structure matching method on uneven signal spectrum conditions.Experiments conducted in the deep sea are introduced to verify the proposed method.The localization results of multiple signals indicated that the proposed method still has a good performance for sources with uneven spectrum.

关 键 词：无源定位 深海 直达声区 干涉结构 水平阵列 

分 类 号：TN9[电子电信—信息与通信工程]