Subspace averaging of steady-state visual evoked potentials

Abstract
A new algorithm for doing signal averaging of steady-state visual evoked potentials (VEPs) is described. The subspace average is obtained by finding the orthogonal projection of the VEP measurement vector onto the signal subspace, which is based on a sinusoidal VEP signal model. The subspace average is seen to out-perform the conventional average using a new signal-to-noise-ratio-based performance measure on simulated and actual VEP data.

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