摘要
利用高阶谱分析的方法对实际的海洋环境噪声和舰船辐射噪声的高斯性和线性特性进行了检测 ,发现在一般情况下 ,短时间内的海洋环境噪声是高斯信号 ,而舰船辐射噪声信号则是非高斯和非线性的。它们的这些差异性可以用来进行舰船辐射噪声的检测 。
High order spectrum is non-sensitive to Gaussian rando m signals,and it has special character in linear random process. In this paper , the Gaussianity and the linearity of the ocean ambient and ship noise are detect ed with high order spectrum analysis. It is found that in general,the ocean amb ient noise is Gaussian,and the ship noise is non-Gaussian and non-linear. The se differences between them can be used to detect the ship noise and decrease so much as to eliminate the ocean ambient noise and improve the signal and noise r atio,and in condition that we more precisely process the ship noise, the shi p noise must be considered as a non-linear process.
出处
《数据采集与处理》
CSCD
2000年第3期301-306,共6页
Journal of Data Acquisition and Processing
基金
国家教委博士学科点专项基金
国防科技预研基金资助项目
关键词
舰船噪声
检测
海洋环境噪声
高斯性
s hip noise
linearity
detection
ocean ambient noise
Gaussianity
