1. School of Electronics Engineering, Vellore Institute of Technology, Vellore, India
2. Department of Signal Theory and Communications, Universidad Carlos III de Madrid, Leganés, Madrid, Spain
3. Department of Electrical Engineering, College of Engineering, Jouf University, Sakaka, Saudi Arabia
4. Center for Communications Technology, London Metropolitan University, London, U.K.
5. Faculty of Engineering and Architecture, Kore University of Enna, Enna, Italy
6. Université Polytechnique Hauts-de-France, Institut d’Électronique de Microélectronique et de Nanotechnologie (IEMN) CNRS UMR 8520, ISEN, Centrale Lille, University of Lille, Valenciennes, France
7. School of Engineering and the Built Environment, Edinburgh Napier University, Edinburgh, U.K.
8. Department of Electric, Electronic, Communication Engineering, and Institute of Smart Cities, Public University of Navarre, Pamplona, Spain