alexa Efficient feature selection and linear discrimination of EEG signals
Biomedical Sciences

Biomedical Sciences

Journal of Bioengineering & Biomedical Science

Author(s): Germn RodrguezBermdez, Pedro J Garca Laencina, Joaquin Roca

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Brain–Computer Interface systems (BCIs) based on Electroencephalogram (EEG) signal processing allow us to translate the subject's brain activities into control commands for computer devices. This paper presents an efficient embedded approach for feature selection and linear discrimination of EEG signals. In the first stage, four well-known feature extraction methods are used: Power spectral features, Hjorth parameters, Autoregressive modelling and Wavelet transform. From all the obtained features, the proposed method efficiently selects and combines the most useful features for classification with less computational requirements. Least Angle Regression (LARS) is used for properly ranking each feature and, then, an efficient Leave-One-Out (LOO) estimation based on the PRESS statistic is used to choose the most relevant features. Experimental results on motor-imagery BCIs problems are provided to illustrate the competitive performance of the proposed approach against other conventional methods.

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This article was published in Neurocomputing and referenced in Journal of Bioengineering & Biomedical Science

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