[1] City Univ Hong Kong, Dept Elect Engn, State Key Lab Millimeter Waves, Hong Kong, Hong Kong, Peoples R China
[2] City Univ Hong Kong, Shenzhen Res Inst, Shenzhen Key Lab Millimeter Wave & Wideband Wirel, Informat & Commun Technol Ctr, Shenzhen 518055, Peoples R China
[3] S China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510006, Guangdong, Peoples R China