Affiliation: | 1. Chair Professor and Head of the Department of Electrical Engineering , The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong E-mail: eekpwong@polyu.edu.hk;2. Senior Lecturer of the School of Information Technology and Electrical Engineering, The University of Queensland , St Lucia, QLD 4072, Australia E-mail: zdong@itee.uq.edu.au |