1. State Key Laboratory of Media Convergence and Communication, Communication University of China, Beijing, China
2. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, Henan, China
3. School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, Belfast, U.K.
4. Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL, Canada