用于声源三维定位估计的FLOC-ISM算法  

FLOC-ISM used for 3D-DOA estimation of sound source

作　　者：陈栋[1] 杨保海[1] 丁文斌[1] CHEN Dong;YANG Baohai;DING Wenbin(School of Electronic Engineering,Jiujiang University,Jiujiang 332005,China)

机构地区：[1]九江学院电子工程学院

出　　处：《现代电子技术》2018年第21期47-51,共5页Modern Electronics Technique

基　　金：国家自然科学基金项目(61261046);江西省教育厅科学技术研究项目(GJJ14721;GJJ14739);九江学院校级科研项目(2016KJ003)~~

摘　　要：在冲激噪声环境下,ISM算法对声源的三维定位估计将失去稳健性。为此,改进了ISM算法,提出FLOC-ISM算法。首先对描述冲激噪声的SαS分布模型及描述信号的圆阵信号模型进行分析;然后对圆阵输出矩阵预处理,构造分数低阶相关矩阵替代二阶相关矩阵,得到声源空间谱,进行谱峰搜索,找出极值点;最后得到声源三维定位估计。通过仿真及性能分析,在冲激噪声背景下,FLOC-ISM算法可对多个声源的三维定位进行正确估计,较ISM算法具有良好的稳健性。The incoherent signal subspace method(ISM)has poor robustness for 3D-DOA(three-dimensional direction of arrival)estimation of sound source in impulsive noise environment.Therefore,the ISM is improved,and the fractional lower order correlation based ISM(FLOC-ISM)is proposed.The SαS distribution model of impulsive noise and circular array signal model of description signal are analyzed.The output matrix of circular array is preprocessed,and the fractional lower order correlation matrix is constructed to replace the second-order correlation matrix to get the space spectrum of sound source.The spectral peak search is carried out for the space spectrum to find out the extreme point,and the 3D-DOA estimation of sound source is realized.The simulation and performance analysis results show that the FLOC-ISM can accurately estimate the 3D-DOA of multiple sound sources in impulsive noise background,and has better robustness than ISM.

关 键 词：三维定位 声源 ISM算法 空间谱 冲激噪声 分数低阶相关 

分 类 号：TN912.3-34[电子电信—通信与信息系统]