1. Informazione e Bioingegneria,Politecnico di Milano, Dip. di Elettronica,Milano,Italy,20133
2. National Institute of Information and Comm. Technology,Koganei,Japan
3. Fraunhofer Institute for Telecommunications HHI,Berlin,Germany,10587
4. Prysmian Group,Milano,Italy
5. University of L’Aquila and CNIT,L’Aquila,Italy,67100