1. School of Microelectronics and Communication Engineering. Chongquing University,Chongqing,China
2. School of Optoelectronics Engineering, Chongqing University of Posts and Telecommunications,Chongqing,China
3. Xi'an University of Posts and Telecommunications,Shaanxi Key Laboratory of Information Communication Network and Security,Xi'an,China
4. City University of Hong Kong,Department of Computer Science,Hong Kong
5. Singapore University of Technology and Design,Information Systems Technology and Design Pillar,Singapore