Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.|Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.|Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.|Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.|Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.|Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.