1. School of Electronic and Information Engineering, Beihang University, Beijing, China
2. Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
3. School of Electronic Engineering and Computer Science, Queen Mary University of London, London, U.K.
4. Faculty of Engineering and Applied Science, Memorial University, St. John’s, NL, Canada
5. Department of Electrical and Electronic Engineering, Communications and Signal Processing Group, Imperial College London, London, U.K.
6. School of Information Technology, Deakin University, Geelong, VIC, Australia
7. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China
8. Wireless Advanced System and Competency Centre, Huawei Technologies Company Ltd., Ottawa, Canada