1. Department of Electrical Electronics and Computer Engineering; Catania University; Viale A. Doria 6 95125 Catania Italy
2. ST Microelectronics; Stradale Primo Sole 50 95125 Catania Italy
3. Department of Information Infrastructure and Sustainable Energy Engineering; Mediterranea University of Reggio Calabria; Via Graziella Loc. Feo di Vito 89122 Reggio Calabria (RC) Italy