[1] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
[2] Northwestern Polytech Univ Shenzhen, Dept Elect Engn, Res & Dev Inst, Shenzhen 518057, Peoples R China
[3] Northwestern Polytech Univ, Sch Automat, Xian 710072, Peoples R China
[4] Univ Melbourne, Dept Elect & Elect Engn, Melbourne, Vic 3010, Australia