Affiliation: | a Lab. des Signaux et Systémes, Supelec, Plateau du Moulon, Gif-sur-Yvette 91192, France b Faculty of Applied Mathematics, University of Twente, P.O. Box 217, AE Enschede 7500, The Netherlands c Lab. d'Automatique, CNRS UMR 5007 CPE Lyon, Universite Claude Bernard, Lyon, Villeurbanne, France d Department of Electrical Engineering, Northeastern University, 409 Dana Bldg., Boston, MA 02115, USA |