1. State Key Laboratory of Rail Traffic Control and Safety, Frontiers Science Center for Smart High-speed Railway System, 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. Beijing Mass Transit RailWay Operation Corporation Signals and Telecoms Branch Company, Beijing, China
3. BII-Nufront Technology Company Ltd., Beijing, China