海洋环境噪声空间相关系数的统计特性  

Statistical characteristics of spatial correlation coefficient of ocean ambient noise

作　　者：任超 黄益旺 REN Chao;HUANG Yiwang(National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学水声技术全国重点实验室,黑龙江哈尔滨150001 [2]海洋信息获取与安全工业和信息化部重点实验室(哈尔滨工程大学),黑龙江哈尔滨150001 [3]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2024年第11期2160-2167,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(12074088).

摘　　要：由于海洋环境的复杂性和随机性,实测海洋环境噪声空间相关系数同样具备随机性。本文利用南海浅海海洋环境噪声数据,分析比较了窄带以及宽频带海洋环境噪声空间相关系数统计特性,计算了海洋环境噪声空间相关系数的估计误差。结果表明:实测海洋环境噪声相关函数样本服从正态分布,噪声相关系数样本服从截断正态分布;带宽越宽,海洋环境噪声空间相关系数概率密度分布越集中,在数据量一定的条件下,宽频带噪声空间相关系数的估计精度高于窄带噪声。Owing to the complexity and randomness of the ocean environment,the measured spatial correlation coefficient of ambient noise also exhibits randomness.This paper analyzes and compares the statistical characteristics of spatial correlation coefficients for narrowband and broadband ocean environment noise using the ambient noise data from the South China Sea.The estimation errors of spatial correlation coefficients of ambient noise are calculated,revealing that the samples of the measured ambient noise correlation function samples follow a normal distribution,while the noise correlation coefficient samples obey a truncated normal distribution.It is found that the wider the bandwidth,the more concentrated the probability density distribution of the spatial correlation coefficient of ambient noise.Furthermore,given limited data,the estimation accuracy of the spatial correlation coefficient for broadband noise is higher than that for narrowband noise.

关 键 词：海洋环境噪声 空间相关系数 统计特性 宽频带噪声 区间估计 概率密度 正态分布 估计误差 

分 类 号：P733.22[天文地球—物理海洋学]