单路单周期心音混叠信号欠定盲分离方法  

Single Channel-single Period Heart Sound Mixed Signal Underdetermined Blind Source Separation Method

作　　者：成谢锋[1] 吴晓晓[1] 王路飞[1] 陈泓[1] 

机构地区：[1]南京邮电大学电子科学与工程学院,江苏南京210023

出　　处：《南京邮电大学学报（自然科学版）》2013年第2期25-30,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61271334)资助项目

摘　　要：结合现有的单路混叠盲分离算法和心音信号的周期特性,提出了一种基于dwt_ica的单路单周期心音混叠信号欠定盲分离算法。该算法首先得到一组单周期独立心音子波,然后把该独立心音子波加入到一个单路单周期心音混叠信号中,从而将一路信号变成一个多路信号,接着再利用ICA方法分离该多路信号,可获得源心音信号的一种估计。心音混叠信号的盲分离仿真实验表明,该算法是行之有效的。With a single channel mixed signal BSS method and the periodicity of heart sound, this paper presents a single channel-single period heart sound mixed signal underdetermined blind source separation method by using discrete wavelet transform（DWT） and independent component analysis（ICA）. First,this method uses dwt_ica to get independent heart sound sun-band. Then it puts the independent heart sound sun-band into the single channel heart sound mixed signal, and makes single channel signal turn into multi channel signals, so the heart sound signal could be separated by using ICA again. Finally, the experiments on the heart sound signal demonstrated the feasibility of the method.

关 键 词：欠定盲分离 心音信号 独立心音子波 

分 类 号：TN911.6[电子电信—通信与信息系统]