Continuous EEG signal analysis for asynchronous BCI application

Wei Yen Hsu

研究成果: 雜誌貢獻文章同行評審

70 引文 斯高帕斯(Scopus)

摘要

In this study, we propose a two-stage recognition system for continuous analysis of electroencephalogram (EEG) signals. An independent component analysis (ICA) and correlation coefficient are used to automatically eliminate the electrooculography (EOG) artifacts. Based on the continuous wavelet transform (CWT) and Student's two-sample t-statistics, active segment selection then detects the location of active segment in the time-frequency domain. Next, multiresolution fractal feature vectors (MFFVs) are extracted with the proposed modified fractal dimension from wavelet data. Finally, the support vector machine (SVM) is adopted for the robust classification of MFFVs. The EEG signals are continuously analyzed in 1-s segments, and every 0.5 second moves forward to simulate asynchronous BCI works in the two-stage recognition architecture. The segment is first recognized as lifted or not in the first stage, and then is classified as left or right finger lifting at stage two if the segment is recognized as lifting in the first stage. Several statistical analyses are used to evaluate the performance of the proposed system. The results indicate that it is a promising system in the applications of asynchronous BCI work.
原文英語
頁(從 - 到)335-350
頁數16
期刊International Journal of Neural Systems
21
發行號4
DOIs
出版狀態已發佈 - 8月 2011
對外發佈

ASJC Scopus subject areas

  • 電腦網路與通信

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