Wiener filtration versus averaging of evoked responses.

Abstract

The extraction of the evoked potential by the Wiener filtration technique is performed to compare it with classical averaging. It is well known that the Wiener filter supplies the least square error estimate. On the other hand, it is apparent that this error substantially depends on the choice of the lengths of interstimulation intervals. Artificially simulated examples are processed by both techniques, averaging and Wiener filtration, to show that the proper choice of the interstimulating intervals is much more relevant for decreasing the estimate error than in helping us make the decision which of these methods should be used.