1. College of Electronic and Information Engineering, Tongji University, Shanghai, China
2. Department of Electronic and Electrical Engineering, University College London, London, U.K
3. School of Electronic and Information Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, China
4. School of Electronic and Information Engineering, Chongqing University of Posts and Telecommunication, Chongqing, China
5. Huayu Automative System Company Ltd., Shanghai, China