1. State Key Laboratory of Rail Traffic Control and Safety, and the Key Laborary of Railway Industry of Broadband Mobile Information Communications, Beijing Jiaotong University, Beijing, China
2. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, China
3. Faculty of Electrical Engineering, Mathematics and Computer Science, University of Twente, Enschede, NB, The Netherlands
4. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, China
5. Institute of Computing Technology, China Academy of Railway Sciences Corporation Limited, Beijing, China