基于四阶累积量的声波阵列时延估计算法  

Acoustic Array Time Delay Estimation Algorithm Based on Fourth-Order Cummulant

作　　者：王春艳[1] 孙志峰[1] 陈洪海[1] 

机构地区：[1]中海油田服务股份有限公司,河北燕郊065201

出　　处：《电声技术》2013年第6期42-45,共4页Audio Engineering

基　　金：国家重大专项项目(2011ZX050202005);国家"863"计划项目(SQ2010AA0920229001)

摘　　要：针对多通道阵列声波信号中可能存在相关噪声的问题,提出了一种基于四阶累积量的时延估计算法。该算法首先计算相邻通道的四阶累积量一维切片,然后对多个通道进行平均,利用高斯噪声四阶累积量为零的性质,抑制多通道阵列环境中存在的相关高斯噪声。实验表明,在较低信噪比情况下,该算法优于传统互相关算法。In multi - channel array acoustic signal time delay estimation, there may exist correlated noises. For this problem, a fourth -order eummulant algorithm is presented. In this algorithm, the 1 -D slice of fourth-order cummulant for adjacent chan- nels is firstly calculated and then the multiple eummulants are averaged. Utilizing the property that the fourth -order cummulant of Gaussian noises is zero, the correlated Ganssian noise can be restrained in multi -channel environment. Experiments show that in the low signal- tonoise ratio eases, the presented algorithm outperforms the traditional cross correlation algorithm.

关 键 词：四阶累积量 时延估计 阵列 

分 类 号：TB5[理学—物理]