1. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing, China
2. School of Electronic and Information Engineering, State Key Laboratory of Rail Traffic Control and Safety, and Beijing Engineering Research Centre of EMC and GNSS Technology for Rail Transportation, Beijing Jiaotong University, Beijing, China
3. School of Electronic and Information Engineering and the Frontiers Science Center for Smart High-Speed Railway System, Beijing Jiaotong University, Beijing, China
4. State Key Laboratory of Automotive Safety an Energy, School of Vehicle and Mobility, Tsinghua University, Beijing, China