1. School of Electronic Information and Electrical Engineering, Chengdu University, Chengdu 610106, China
2. Sichuan Time Frequency Synchronization System and Application Engineering Technology Research Center, Chengdu 610106, China
3. Chengdu Jinjiang Electronic System Engineering Co., Ltd., Chengdu 610051, China
4. The Fifth Research Institute of Telecommunications Science and Technology Co., Ltd., Chengdu 610021, China