1. Beijing University of Posts and Telecommunications, School of Information and Communication Engineering, Beijing, ChinabThe Pennsylvania State University, Department of Electrical Engineering, University Park, Pennsylvania, United States
2. Beijing University of Posts and Telecommunications, School of Information and Communication Engineering, Beijing, ChinacBeijing University of Technology, Beijing Advanced Innovation Center for Future Internet Technology, Beijing, China
3. The Pennsylvania State University, Department of Electrical Engineering, University Park, Pennsylvania, United States