[1] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing 210094, Peoples R China
[2] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510006, Peoples R China
[3] Shanghai Jiao Tong Univ, Minist Educ Design & Electromagnet Compatibil Hig, Key Lab, Shanghai 200240, Peoples R China
[4] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 211106, Peoples R China
[5] City Univ Hong Kong, Dept Elect Engn, Hong Kong, Peoples R China