摘要
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,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。该研究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 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 are achieved by using the wavelet package soft threshold method. These methods have a significant foreground in de-noising of passive sonar.
出处
《中国海洋平台》
2007年第5期22-26,共5页
China offshore Platform
关键词
舰船辐射噪声
被动声呐
小波降噪
ship radiated noise,passive sonar, de-noising based on the wavelet
