Research on Standard Time Replication Method Based on Multi-Reference Terminal Fusion

In order to meet the needs of users for standard time frequency signals, the National Time Service Center Time frequency Laboratory has established a set of standard time remote replication system, and its users are distributed in multiple sites across the country. The regular working mode of the system is point-to-multi-broadcast service, which puts forward higher requirements for the reliable and stable operation of the reference terminal. Aiming at the limitations of the existing standard time remote replication system, this paper proposes a standard time replication method based on the fusion of multi-reference terminals, which not only solves the problem that a single reference terminal cannot guarantee the continuity and stability of the system in the event of sudden anomalies, but also finds that the recurrence capability of multi-reference terminal fusion is superior to that of a single reference terminal through comparative test and experiment. The results show that the standard deviation is increased from 1.3ns to O.55ns, and the peaking value is increased from 10.74ns to 3.57ns, which can meet the high precision and high reliability requirements of users for standard time-frequency signals.