水声信号的非高斯特性分析与检测方法的研究

本文研究了海洋环境噪声和船舶噪声的高斯性,通过实验研究发现,纯净的海洋环境噪声(夜晚无行船时)呈现出高斯性,反之是非高斯;船舶噪声是服从非高斯的,另外无论海洋环境噪声,还是船舶噪声,在相等样本长度下,在不同频段的高斯性上也有差异,分析频段越低,统计量越大,反之统计量越小.基于高阶累积量T2在船舶由远及近的过程中的变化规律,研究了非高斯背景下非高斯信号的一种检测方法,即在海洋环境噪声下检测船舶噪声的方法.通过实船实验得到了满意的结果.

A Detection Method of the Non-Gaussian signal from the Non-Gaussian Background

In the paper, the gaussianity of the water acoustic signal are studied by higher-order statistics and some rules are found, such as, The water acoustic of the claim sea is gaussian, the other way round, is non-gaussianity. The ship noise is non-gaussian. So the problem of the detection of the ship noise from the sea noise is transmitted as the non-gaussian signal from the non-gaussian background. We study this detection issue deeply by the higher-order cumulant T2 By the way of the The good result is gained.