College of Communications Engineering, PLA University of Science and Technology, Nanjing, China;
School of Communication Engineering, Nanjing Institute of Technology, Nanjing, China;
College of Communications Engineering, PLA University of Science and Technology, Nanjing, China;
Information Security Center, Beijing University of Posts and Telecommunications, Beijing, China;
Nanjing University of Information Science and Technology, Nanjing, China;
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China;