基于小波的被动声呐降噪研究

A Study on the De-noising of the Passive Sonar Based on the Wavelet

采用基于小波的降噪理论,研究了水下舰船辐射噪声的被动声呐降噪问题,在舰船辐射噪声的建模与仿真条件下,分析对比了不同方法对舰船辐射噪声信号降噪的效果,并分析比较了利用各种小波基和采用不同阈值条件下对信号进行降噪处理的效果。在分析对比的基础上进行小波包软阈值去噪取得了较好的效果,对被动声呐降噪提供了较好的应用前景。

This paper focuses on the research of the de -noising of the passive sonar based on the wavelet. Based on the modeling and simulation of the ship radiated noise, this paper analyzes and compares the effect of the de-noising of the passive sonar of ship radiated noise in different ways and means, in different kinds of wavelet basis and in wavelet package including different kinds of threshold. It is shown that better de-noising effect is achieved by using the wavelet package soft threshold method. These methods have a significant foreground in de-noising of passive sonar.