Page 274 - 应用声学2019年第4期

第 38 卷 第 4 期 Vol. 38, No. 4
2019 年 7 月 Journal of Applied Acoustics July, 2019

⋄ 李启虎院士八十华诞学术论文 ⋄

基于变分模态分解和对称相关的

目标舰船线谱检测

郭 政 1,2 胡长青 1†

(1 中国科学院声学研究所东海研究站 上海 201815)
(2 中国科学院大学 北京 100049)

摘要 线谱检测是水下目标识别中的一个重要研究方向。针对舰船辐射噪声线谱信号检测与提取的需求，该
文改进提出了一种基于变分模态分解和对称相关的降噪处理方法，研究了与目标线谱信号不相关的加性高斯
噪声消除办法。假设舰船辐射噪声除线谱成分外均为高斯噪声，对舰船辐射噪声中线谱成分进行检测。理论
推导、仿真计算与实验数据处理结果均表明，该文提出的方法能较好地检测加性高斯噪声背景下的线谱成分，
较传统的相关方法更为有效。
关键词 舰船辐射噪声，变分模态分解，对称相关，线谱检测
中图法分类号: TN911.7 文献标识码: A 文章编号: 1000-310X(2019)04-0734-08
DOI: 10.11684/j.issn.1000-310X.2019.04.034

Target ship line-spectrum detection based on variational mode decomposition

and symmetrical correlation

GUO Zheng 1,2 HU Changqing 1

(1 Shanghai Acoustics Laboratory, Chinese Academy of Sciences, Shanghai 201815, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract Line-spectrum detection is one of the important research directions of underwater target recogni-
tion. In view of the demand of the ship radiated noise signal’s detection and extraction, a kind of noise reduction
processing method based on variational mode decomposition (VMD) and symmetrical correlation is put for-
ward in this paper, and the de-noising method of additive Gaussian noise unrelated to target line-spectrum
signal is also studied. Suppose that ship radiated noise except line-spectrum composition is Gaussian noise, the
line-spectrum composition of the ship radiated noise has been detected. It is showed that the method proposed
in this paper is able to better detect line-spectrum composition in additive Gaussian noise background based
on theoretical derivation, simulation results and experimental data processing results, which is more effective
than traditional correlation method.
Key words Ship radiated noise, Variational mode decomposition, Symmetrical correlation, Line-spectrum
detection

2019-02-14 收稿; 2019-05-30 定稿
作者简介: 郭政 (1994- ), 男, 山东嘉祥人, 博士研究生, 研究方向: 信号与信息处理。
† 通讯作者 E-mail: hchq@mail.ioa.ac.cn