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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 953745, 9 pages
http://dx.doi.org/10.1155/2014/953745
Research Article

The Application of FastICA Combined with Related Function in Blind Signal Separation

College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, China

Received 20 July 2013; Accepted 7 March 2014; Published 3 April 2014

Academic Editor: Vishal Bhatnagar

Copyright © 2014 Dengao Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Blind source separation (BSS) has applications in the fields of data compression, feature recognition, speech, audio, and biosignal processing. Identification of ECG signal is one of the challenges in the biosignal processing. Proposed in this paper is a new method, which is the combination of related function relevance to estimated signal and negative entropy in fast independent component analysis (FastICA) as objective function, and the iterative formula is derived without any assumptions; then the independent components are found by maximizing the objective function. The improved algorithm shorthand for R-FastICA is applied to extract random mixed signals and ventricular late potential (VLP) signal from normal ECG signal; simultaneously the performance of R-FastICA algorithm is compared with traditional FastICA through simulation. Experimental results show that R-FastICA algorithm outperforms traditional FastICA with higher similarity coefficient and separation precision.