基于高阶累积量的简正波声场匹配场定位效果分析 |
Analysis of the effect of matching field location of normal wave sound field based on higher-order cumulant |
投稿时间:2019-11-09 修订日期:2020-02-06 |
DOI: |
中文关键词: 高阶累计量、简正波声场、匹配场、高斯有色噪声、旁瓣 |
英文关键词:higher-order cumulants normal wave field matching field Gaussian colored noise sidelobes |
基金项目:山东省大学生创新训练项目(S201910424051、S201910424041) |
|
摘要点击次数: 213 |
全文下载次数: 0 |
中文摘要: |
本文主要介绍了一种在海洋声层析环境下利用高阶累计量来降低匹配场处理中高斯有色噪声的算法。由于传统匹配场处理器主要针对的是接收信号为高斯信号这种情况,而海洋环境中并非仅有高斯白噪声,也存在着大量的有色噪声,非高斯信号的高阶累积量值不恒为零,于是设计基于高阶累积量的匹配场处理器便具有一定价值。文中主要对比了基于高阶累积量的简正波声场匹配场处理器和传统线性匹配场处理器、自适应匹配场处理器以及二阶MUSIC算法匹配场处理器在相同声场环境条件下的匹配场定位效果。结果显示:在不考虑参数失配与适度较大计算量的前提下,接收信号在经过基于高阶累积量的匹配场处理器后再进行匹配场定位,能够有效降低旁瓣,并且使用高阶累积量可以显著消除海洋传播环境中高斯有色噪声和高斯白噪声对信号的干扰,其匹配效果皆优于传统线性匹配场处理器、自适应匹配场处理器和二阶MUSIC算法匹配场处理器。 |
英文摘要: |
This paper mainly introduces an algorithm of reducing Gauss's colored noise in matched field processing by using high-order cumulants in marine acoustic tomography. Because the traditional matched field processor mainly aims at the situation that the received signal is Gaussian signal, and there is not only Gaussian white noise in the marine environment, but also a lot of colored noise. The high-order cumulant value of non-Gaussian signal is not always zero, so the design of matched field processor based on the high-order cumulant has certain value.This article mainly compares the matching field localization effect of the normal wave sound field matching field processor based on higher-order cumulants and traditional linear matching field processor, adaptive matching field processor, and second-order MUSIC algorithm matching field processor under the same sound field environment conditions. The results show that: without considering the parameter mismatch and a moderate amount of computation, the received signal can be located in the matched field after passing through the matched field processor based on the high-order cumulant, which can effectively reduce the sidelobe, and the high-order cumulant can significantly eliminate the interference of Gaussian colored noise and Gaussian white noise on the signal in the marine propagation environment. And its matching effect is better than that of traditional linear matching field processor, adaptive matching field processor and second-order MUSIC algorithm matching field processor. |
查看/发表评论 下载PDF阅读器 |