ON TIME-DELAY ESTIMATION OF EPILEPTIC EEG

The present study deals with comparative evaluation of various methods for time delay estimations applied to multichannel seizure EEG. The d ifferent methods included block algorithms, both in time and frequency domains (such as General Crosscorrelation, FFT, AR), and a new method for time delay estimation based on adaptive least-squares filtering. The various time delay estimators were tested on simulated signals and on real multichannel EEG recorded from rats having generalized seizur es with focal onset. The adaptive least-squares filtering (the lattice -ladder type) has been found as the most efficient for time delay esti mation.