Functional link network with genetic algorithm for evoked potentials

Bor-Shyh Lin, Bor Shing Lin, Jen Chien Chien, Fok Ching Chong*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this study, a functional link network with genetic algorithm is employed for extracting evoked potentials. Evoked potentials are time-varying signals typically buried in relatively large noises of electroencephalogram. Recently, to extract evoked potentials more effectively from noises, adaptive filtering techniques are widely employed for evoked potentials. In general, least-mean-square algorithm is used to adapt filter weights. However, it is well-known that the selection of step-sizes is a trade-off on the convergence rate and steady state performance. In practice, an inappropriate step-size always causes deficiency. Therefore, the proposed method employs genetic algorithm to improve this issue. Genetic algorithm is basically a kind of evolutionary strategies. The step-size candidates are regularly generated and evaluated, and the fittest candidate is selected for subsequent adaptation. Results show that the proposed method is insensitive to the selection of step sizes and reference inputs. It is applicable for extracting EP in different noise levels.

Original languageEnglish
Pages (from-to)193-200
Number of pages8
JournalBiomedical Engineering - Applications, Basis and Communications
Volume17
Issue number4
DOIs
StatePublished - 25 Aug 2005

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