1. State Key Laboratory of Advanced Rail Autonomous Operation, the Frontiers Science Center for Smart High-speed Railway System, the Key Laboratory of Railway Industry of Broadband Mobile Information Communications, and the Beijing Engineering Research Center of High-Speed Railway Broadband Mobile Communications, Beijing Jiaotong University, Beijing, China
2. School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing, China
3. School of Science and Engineering, Shenzhen Research Institute of Big Data, The Chinese University of Hong Kong, Shenzhen, China
4. China Academy of Industrical Internet, Ministry of Industry, and Information Technology, Beijing, China
5. School of Information Science and Engineering, Shaoyang University, Shaoyang, China
6. School of Electrical and Electronics Engineering, Nanyang Technological University, Singapore