1. Dipartimento di Ingegneria dell'InformazioneUniversity of PadovaVia Gradenigo 6/b35131PadovaItaly
2. Laboratoire de Conception et d'Intégration des Systèmes (LCIS)Grenoble INP50 Rue Barthélémy de Laffemas BP‐5426902Valence Cedex 09France
3. School of Electronics Engineering and Computer ScienceQueen Mary University of LondonMile End RoadLondonUK
4. Center for Advanced Studies in TelecommunicationCOMSATS Institute of Information TechnologyPark RoadIslamabadPakistan