水下高阶声场宽带信号最优检测后处理方法

doi:10.13209/j.0479-8023.2024.091

北京大学学报自然科学版 ›› 2024, Vol. 60 ›› Issue (6): 1009-1014.DOI: 10.13209/j.0479-8023.2024.091

水下高阶声场宽带信号最优检测后处理方法

王强^1,†, 吴玺宏¹, 潘悦², 高山¹

1. 北京大学智能学院, 北京 100871 2. 杭州应用声学研究所, 杭州 310012

收稿日期:2024-01-16 修回日期:2024-03-24 出版日期:2024-11-20 发布日期:2024-11-20
通讯作者: 王强, E-mail: 2206390549@pku.edu.cn

An Optimal Post Processing Detection Method for Underwater Broadband Signals of High-Order Sound Field

WANG Qiang^1,†, WU Xihong¹, PAN Yue², GAO Shan¹

1. School of Intelligence Science and Technology, Peking University, Beijing 100871 2. Applied Acoustics Research Institute, Hangzhou 310012

Received:2024-01-16 Revised:2024-03-24 Online:2024-11-20 Published:2024-11-20
Contact: WANG Qiang, E-mail: 2206390549@pku.edu.cn

摘要/Abstract

摘要：

针对小孔径传感器在实际多干扰目标条件下分辨能力弱、应用难的问题, 提出一种高阶声场分阶的宽带信号最优检测后处理方法。利用典型噪声场在高阶声场各阶信号不相关的特性, 通过分阶波束形成, 对波束内信号功率以及噪声功率进行估计, 根据各子带信噪比构建最优检测滤波器。通过千岛湖湖上实测数据验证, 该方法的检测性能可以在原有HOA-MVDR方法的基础上提高2~7.5 dB, 并且能够提高强目标干扰条件下的多目标分辨能力。

关键词: 高阶声场传感器, 波束形成, 最优后处理, 目标探测

Abstract:

According to the weak resolution of small aperture high-order acoustic field sensors under actual multi-target interference conditions in marine environment, a broadband signal optimal detection based on the subset of high-order sound field domain post-processing method is proposed. This method utilizes the characteristic of typical noise fields that signals in different orders of the high-order sound field are decorrelation. The signal power and noise power within one beam are estimated through the subset of high-order acoustic signals with MVDR. An optimal beam domain detection filter based on the signal-to-noise ratio of each subband is constructed. This method is verified through multiple measured dataset on Qiandao Lake. The detection capability is improved by 2–7.5 dB compared with the original method, and the multi-target resolution capability under strong target interference is significantly improved.

Key words: high-order sound field sensor, beamforming, optimal post processing, target detection

王强, 吴玺宏, 潘悦, 高山. 水下高阶声场宽带信号最优检测后处理方法[J]. 北京大学学报自然科学版, 2024, 60(6): 1009-1014.

WANG Qiang, WU Xihong, PAN Yue, GAO Shan. An Optimal Post Processing Detection Method for Underwater Broadband Signals of High-Order Sound Field[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2024, 60(6): 1009-1014.

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链接本文: https://xbna.pku.edu.cn/CN/10.13209/j.0479-8023.2024.091

https://xbna.pku.edu.cn/CN/Y2024/V60/I6/1009

水下高阶声场宽带信号最优检测后处理方法

An Optimal Post Processing Detection Method for Underwater Broadband Signals of High-Order Sound Field

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