Title :
Instantaneous characterization of time varying nonlinear systems (neurophysiological responses)
Author :
Krieger, D. ; Berger, T.W. ; Sclabassi, R.J.
Author_Institution :
Pittsburgh Univ., PA, USA
fDate :
4/1/1992 12:00:00 AM
Abstract :
A nonlinear system may be characterized by an orthogonal functional power series (FPS) computed from cross correlations between input and output variables. ´Is the response changing over the course of the experiment?´ is a fundamental question encountered in the analysis of both FPS and evoked potentials (EPs). Regression on closed-form functions of time produces a time-varying FPS or EP. Evaluation of these functions at a specified time point produces a system characterization for that instant.
Keywords :
bioelectric potentials; neurophysiology; cross correlations; evoked potentials; input variables; instantaneous characterization; neurophysiological responses; orthogonal functional power series; output variables; time varying nonlinear systems; Biological processes; Biological systems; Electric shock; History; Kernel; Neuroscience; Nonlinear systems; Psychiatry; Time varying systems; White noise; Evoked Potentials; Humans; Mathematics; Models, Neurological; Poisson Distribution; Regression Analysis; Signal Processing, Computer-Assisted; Time Factors;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
