A comparative study of two reference estimation methods in EEG recording

Abstract

In [1] we proposed two methods to identify the reference electrode signal under the key assumption that the reference signal is independent from EEG sources. This assumption is shown to be possibly true for intracranial EEG with a scalp reference. In this paper, we theoretically prove that the obtained reference signal by using the second method in [1] or the equivalent MPDR approach [1] outperforms the widely used average reference (AR) if the real reference is independent from EEG sources. The simulation results confirm the advantages over AR. © 2012 Springer-Verlag.