Design and implementation of non-integer band pass filters for EEG processing

Abstract

The problem of signal processing in EEG analysis is a current and interesting one. Appropriate choice of the filter is still a topic of ongoing discussion. In this paper we analyze application of non-integer band pass filters for this purpose. Non-integer filters are interesting because of their flexibility in the shaping of slopes in amplitude response. However, their direct digital implementation is not possible, as they require infinite memory because of lack of semigroup property. We show how to implement non-integer filters using Laguerre Impulse Response Approximation (LIRA) method. Also design of filter is discussed and illustrated with two examples of EEG signal processing.