Biosignals: A General Approach for Analysis


Department of Electrical Engineering,Sharif University of Technology


In this paper, a biosignal analysis approach to determine the relation between a typical cell action current (potential) and its resulted biosignals is presented. This relation is a logical result that can be obtained from the electrophysiological concepts governing the biosignals generating phenomena and can tell us some facts about its generating organ. Therefore, one has an input Action Current or AC), an output (biosignal) and an unknown system (black box) relating them together. In this study, a linear system modeling is proposed to identify that relationship. This system acts as a transfer function (or generating function) that generates different forms of biosignal from a unique input (AC) waveform and can describe the functional physiology of the generating tissue (as muscle, brain and etc.). This expression is useful in simulating biopotential signals and, also, in diagnosing their normality or abnormality. In special cases, this relationship and system identification methods for some typical ECGs are used to diagnose some arrhythmias by comparing their generating functions.