Page 25 - 《应用声学》2021年第6期

第 40 卷 第 6 期 Vol. 40, No. 6
2021 年 11 月 Journal of Applied Acoustics November, 2021

⋄ 研究报告 ⋄

浅海低频长线阵声源方位估计 ∗

梁玉权 1,2 周士弘 1,2† 宫在晓 1,2

(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)

摘要：浅海大孔径水平阵信号估计近端射的低频声源方位时，常规波束形成会产生明显的波束偏移和分裂现
象，从而造成单声源方位估计偏差。针对这一问题，提出一种基于块稀疏压缩感知的声源方位估计方法。根据
简正模理论，将水平阵接收声场表示为方位角空间的块稀疏信号模型，并通过块正交匹配追踪算法进行方位
估计。仿真和 2011 年北黄海实验数据结果表明所提块正交匹配追踪方法可实现浅海波导环境下低频近端射
的单个声源方位的准确估计。
关键词：浅海；水平阵；块稀疏；压缩感知；方位估计
中图法分类号: TB566; P733.2 文献标识码: A 文章编号: 1000-310X(2021)06-0821-07
DOI: 10.11684/j.issn.1000-310X.2021.06.003

Low-frequency source azimuth estimation with a long line array

in shallow water

LIANG Yuquan 1,2 ZHOU Shihong 1,2 GONG Zaixiao 1,2

(1 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)
Abstract: When estimating azimuth of a low-frequency and near-end-fire source with a long horizontal line
array (HLA) data by conventional beamforming (CBF), “shift and split” phenomenon occurs, which gives
rise to the bias of the estimated azimuth. To solve this issue, a source azimuth estimation method based on
block sparse compressive sensing is proposed. Sound field of a HLA is expressed as block sparse signal model
according to normal mode theory, and block orthogonal matching pursuit (BOMP) algorithm is used for source
azimuth recovery. Simulation and experiment data at the North Yellow Sea in 2011 show that the azimuth of a
single, low-frequency and near-end-fire source in shallow water is estimated correctly by the proposed BOMP
method.
Keywords: Shallow water; Horizontal line array; Block sparse; Compressive sensing; Azimuth estimation

2021-01-08 收稿; 2021-02-21 定稿
中国科学院前沿科学重点研究项目 (QYZDY-SSW-SLH005), 国家自然科学基金项目 (11804362, 11804364, 11874061)
∗
作者简介: 梁玉权 (1992– ), 男, 广东湛江人, 博士研究生, 研究方向: 水声信号与信息处理。
† 通信作者 E-mail: shih_zhou@mail.ioa.ac.cn