an efficient p300-based bci using Wavelet features and ibpso-based channel selection

We present a novel and efficient scheme that selects a minimal set of effective features and channels for detecting the p300 componentof the event-related potential in the brain–computer interface (bci) paradigm. for obtaining a minimal set of effective features, wetake the truncated coefficients of discrete daubechies 4 wavelet, and for selecting the effective electroencephalogram channels, weutilize an improved binary particle swarm optimization algorithm together with the bhattacharyya criterion. we tested our proposedscheme on dataset iib of bci competition 2005 and achieved 97.5% and 74.5% accuracy in 15 and 5 trials, respectively, using a simpleclassification algorithm based on bayesian linear discriminant analysis. we also tested our proposed scheme on hoffmann’s datasetfor eight subjects, and achieved similar results.