1. Department of Electronic and Computer Engineering, Brunel University, Uxbridge, U.K.
2. Department of Engineering, University of Leicester, Leicester, U.K.
3. Department of Electronic and Computer Engineering, Institute Supérieur d’Electronique de Paris, Paris, France
4. Department Wireless Distribution Systems, Fraunhofer Institute for Integrated Circuits IIS, Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V., Erlangen, Germany
5. National Centre for Scientific Research-Demokritos, Institute of Informatics and Telecommunications, Athens, Greece
6. Institute of Telecommunications/Cybersecurity Division, Warsaw University of Technology, Warsaw, Poland