1. Imperial College London,Department of Electrical and Electronic Engineering,London,UK,SW7 2AZ
2. Automatica e Gestionale A. Ruberti (Sapienza University of Rome); Via Ariosto 25,Dipartimento di Ingegneria Informatica,Rome,Italy,00185
3. Laboratoire de Signaux et Systemes (L2S, CNRS),Gif-sur-Yvette,France,91192