1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, China
2. Department of Electrical Engineering and Computer Engineering, Université Laval, Quebec, Canada
3. School of Electronic Engineering and Computer Science, Queen Mary University of London, London, U.K
4. Department of Electrical and Electronic Engineering, University of Bristol, Bristol, U.K
5. Department of Informatics and Telecommunications, University of Thessaly, Lamia, Greece
6. Faculty of Engineering and Applied Science, Memorial University, St. John’s, Canada