[1] Univ Elect Sci & Technol China UESTC, Chengdu, Sichuan, Peoples R China
[2] Univ Essex, Colchester, Essex, England
[3] Network Convergence Lab NCL, Jeju, South Korea
[4] UCL, London, England
[5] UCL, Adastral Pk Res Campus, London, England
[6] Univ Oulu, Ctr Wireless Communicat CWC, Oulu, Finland
[7] Univ Moratuwa, Moratuwa, Sri Lanka
[8] Asian Inst Technol AIT, Khlong Nueng, Thailand
[9] Univ Elect Sci & Technol China UESTC, Sch Informat & Commun Engn, Chengdu, Sichuan, Peoples R China
[10] Natl Nat Sci Fdn China NSFC, Beijing, Peoples R China
[11] Natl Innovat Res Program, Hangzhou, Zhejiang, Peoples R China
[12] Singapore Univ Technol & Design, Singapore, Singapore
[13] Nanjing Univ Posts & Telecommun, Coll Telecommun & Informat Engn, Jiangsu Key Lab Wireless Commun, Nanjing, Jiangsu, Peoples R China
[14] MIMO Commun, Hong Kong, Peoples R China