摘要
针对水声信号噪声统计分布难以准确描述的问题,在稳定分布相关特性基础上,提出了一种基于对称稳定分布(SαS)的水声信号噪声统计分布模型。首先结合水声信号噪声概率分布的特征,建立了用于描述水声信号噪声统计分布的SαS模型,再根据各种水声环境实际试验数据,对不同水声环境下特征指数的取值范围进行了水池、湖试和海试试验统计。试验数据分析结果表明,SαS分布模型可用于水声噪声信号统计描述。
To accurately describe statistical noise distribution of underwater acoustic signal,we established a statistical noise distribution model of the acoustic signal based on relevant features of symmetric α-stable（） distribution.Firstly,the model configuration for describing noise characteristics of underwater acoustic signal with reverberation was designed by considering the features of noise probability distribution of acoustic signal.Then,the range of index α was determined by trials in tank,lake and sea,respectively,in different acoustic environments.The analysis of the test data shows that the proposed distribution-based model is applicable.
出处
《鱼雷技术》
2012年第5期336-338,343,共4页
Torpedo Technology
基金
国防预研基金项目(513030404)
关键词
水声信号
混响
对称稳定分布
underwater acoustic signal
reverberation
symmetric α-stable distribution
