中国组织工程研究

中国组织工程研究 ›› 2012, Vol. 16 ›› Issue (26): 4877-4880.doi: 10.3969/j.issn.1673-8225.2012.26.025

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

基于分块扩展Infomax算法的胎儿心电分离

苟梅梅，黄 华   

  1. 四川大学电气信息学院，四川省成都市 610065
  • 收稿日期:2011-12-07 修回日期:2012-04-27 出版日期:2012-06-24 发布日期:2013-11-02
  • 作者简介:苟梅梅★，女，1987年生，四川省巴中市人，汉族，四川大学在读硕士，主要从事医学信号处理和医学信息系统的研究。 jiayoumeimei1987@163.com

Block-extend Infomax algorithms in fetal electrocardiogram extraction

Gou Mei-mei, Huang Hua   

  1. School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, Sichuan Province, China
  • Received:2011-12-07 Revised:2012-04-27 Online:2012-06-24 Published:2013-11-02
  • About author:Gou Mei-mei★, Studying for master’s degree, School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, Sichuan Province, China Jiayoumeimei1987@163.com

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摘要：

背景：胎儿心电是围产期对胎儿发育状况监测的重要参数，准确将胎儿心电从母体心电中分离出来是目前研究的重点。
目的：采用分块扩展Infomax算法能够快速、有效的将胎儿心电分离出来。
方法：利用分块扩展Infomax算法结合四阶统计去相关学习规则，使信号加权协方差阵的非对角元素最小化，改善算法收敛速度。
结果与结论：扩展Infomax能实现超高斯和亚高斯信号的同时分离，文章提出的算法在收敛速度上要快于扩展Infomax的收敛速度。扩展Infomax算法能对胎儿心电实现有效的提取，由于分块扩展Infomax算法每次处理的数据量远少于扩展Infomax算法处理的数据量，且分块Infomax算法的迭代次数也远小于扩展Infomax的迭代次数，从而实现了胎儿心电的快速分离。

关键词: 胎儿心电, 盲分离, 扩展Infomax算法, 四阶统计, 数字化医学

Abstract:

BACKGROUND: Fetal electrocardiogram is an important parameter in perinatal period for fetus growing. How to extract the fetal electrocardiogram from maternal electrocardiogram quickly and effectively has become an important research topic.
OBJECTIVE: To use the block-extend Infomax algorithm for the separation of the fetal electrocardiogram quickly and effectively.
METHODS: Block-extened Infomax and statistics into four ranks were combined to study the relate rules which make the non-cross element of weight covariance matrix minimum, and improve the astringency of arithmetic.
RESULTS AND CONCLUSION: Extended infomax algorithm could achieve the separation of super-Gaussian and sub-Gaussian signal. The convergence rate of the algorithm presented in the paper was faster than that of the extended infomax algorithm. Extended Infomax algorithm could effectively extract the fetal electrocardiogram. The amount of the data treated by the block-extend Infomax algorithm was less than that treated by the extended infomax algorithm, and the iteration number of the block-extend Infomax algorithm was smaller than that of the extended infomax algorithm, so the fetal electrocardiogram could be separated quickly and effectively.

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