A new method of spatial filters design for brain-computer interface based on steady state visually evoked potentials

In the article the authors present their own method of designing spatial filters to use in brain-computer interface, based on steady state visually evoked potentials. The spatial filter is calculated by minimizing a specially created objective function. The developed method allows us to create a dedicated filter for each user, however it demands a calibration session. By using designed spatial filters it is possible to identify visual potentials for very close frequencies of flickering light with good efficiency (information transfer rate at 27-57bit/min).