深海声影区稀疏时延估计与声源测距  

Sparse time delay estimation and source ranging in sound shadow zone of deep water

作　　者：刘与涵 董金鑫[3] 郭良浩[1] 闫超[1] 董阁 LIU Yuhan;DONG Jinxin;GUO Lianghao;YAN Chao;DONG Ge(State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049;The 92337th Unit of PLA,Dalian 116023)

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 [3]中国人民解放军92337部队,大连116023

出　　处：《声学学报》2022年第4期417-431,共15页Acta Acustica

基　　金：国防科技创新特区项目;国家自然科学基金项目(11874061,12174418,12174419);国家重点研发计划(2018YFC0308600)资助。

摘　　要：研究了深海声影区中经一次海底反射的多途声线到达垂直双水听器的时延差与声源位置的关系,提出了一种稀疏时延估计与声源测距方法。首先利用近海面布放的短间距垂直双水听器接收一定频带的声信号,然后计算接收信号的广义互相关函数,并利用频谱搬移和稀疏解卷积技术提取时延差,最后通过时延差匹配,估计水下声源的距离。仿真实验表明,在4300 m深海中,所提方法能够正确提取多途到达时延差,估计声影区内的声源距离。海试结果表明,当垂直接收孔径分别为21 m和30 m时,声源测距误差分别小于13.6%和8.1%。上述结果表明,所提出的时延估计方法可适应带宽较窄的接收信号,多途到达时延估计参数可用于实现声影区中的水下声源测距。The correlation between the time delays of multipath rays reflected once by the bottom arriving at vertical dual hydrophones and the source location in the sound shadow zone of deep water is studied.A sparse time delay estimation and source ranging method is proposed.The acoustic signals in a certain frequency band are first received by a pair of short spaced hydrophones deployed vertically near the surface.The generalized cross-correlation function of the received signals is then calculated.The time delays are then extracted using spectrum shifting and sparse deconvolution.The range of the submerged source is finally estimated using time delay matching.The simulations show that the proposed method can correctly extract the time delays of multipath arrivals and estimate the source range within the sound shadow zone in deep water of 4300 m depth.The sea experiments show that the source ranging error is less than13.6%and 8.1%when the vertical receiving aperture is 21 m and 30 m,respectively.The above results prove that the proposed time delay estimation method can be used for signals with narrow bandwidth in deep water.And the estimated time delay parameters can be used for submerged source ranging in the sound shadow zone.

关 键 词：时延估计 时延差 频谱搬移 到达时延 广义互相关 水下声源 声影区 接收孔径 

分 类 号：TB56[交通运输工程—水声工程]