交替投影盲反卷积的阵不变量被动定位  

Performance of array invariant processing using blind deconvolution by alternating projection

作　　者：王卓越 李宇[1,2,3] 王宇杰[1,2,3] 迟骋 WANG Zhuoyue;LI Yu;WANG Yujie;CHI Cheng(Institute of Acoustic,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory of Science and Technology on Advanced Underwater Acoustic Signal Processing,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院先进水下信息技术重点实验室,北京100190 [3]中国科学院大学,北京100049

出　　处：《应用声学》2022年第5期749-757,共9页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(6200011928)。

摘　　要：该文针对低信噪比下传统盲反卷积技术提取格林函数过程中存在的图像模糊问题,提出了一种基于交替投影法的阵不变量浅海被动定位方法。该种方法利用交替投影的方法对波束信号进行分离,并利用分离出的波束分别提取格林函数。最后通过补偿时延的方式将多组波束提取的结果相干组合起来,实现格林函数的多波束联合估计。通过仿真实验证明了该方法有效增强了提取格林函数的强度,使得在低信噪比下利用阵不变量的连续声源定位方法更加稳健。In this paper,the maximum likelihood estimation method of alternating projection is applied to the cascade of blind deconvolution and array invariant,which is in order to solve the problem of Green’s function image blurring in the process of original ray-based blind deconvolution method.By compensating the time delay,the multiple Green’s functions obtained from those separated multipath signals are coherently combined.This method takes advantage of enhancement of Green’s function to improve the location accuracy of array invariant effectively,and makes the location method of continuous sound more robust.

关 键 词：阵不变量 被动定位 交替投影 

分 类 号：TB566[交通运输工程—水声工程]