A high-precision time synchronization system and synchronization method based on Beidou clock signal

Abstract

The invention provides a high-precision time synchronization system and synchronization method based on the Beidou clock signal, including a Beidou clock signal generation module, a conditioning shaping module, an FPGA programmable counter module, a time converter and measurement module, a differential delay phase synchronization module, Gate controller, data processing module, and synchronization result display module; the present invention can greatly improve the time synchronization accuracy between the Beidou satellite and the ground master control station, and the time synchronization accuracy between Beidou satellite 1pps signals at any time is better than 10ps, strengthening It improves the robustness and timing service capability of the Beidou satellite navigation system.

Description

technical field [0001] The invention relates to a time synchronization system and a synchronization method, in particular to a high-precision time synchronization system and synchronization method based on a Beidou clock signal. Background technique [0002] The Beidou satellite navigation system requires high-precision system time. The establishment of the system time not only depends on the precise frequency source but also on the high-precision time synchronization technology. The so-called time synchronization refers to the process in which the time difference between two periodic signals is eliminated or minimized, and the processed time difference will not change over time. The biggest feature of time synchronization is the time difference between the two signals. Has constant invariance. The current high-precision time synchronization method is based on the precise time interval measurement technology. The traditional time interval measurement methods include time ex...

AI Technical Summary

Problems solved by technology

The current high-precision time synchronization method is based on the precision time interval measurement technology. The traditional time interval measurement methods include time expansion counting method, time-amplitude conversion method, time cursor method, differential delay line method, etc. These measurement methods have Very high measurement resolution, but the circuit structure is complex and there is a counting error of ±1 word in the time measurement process, which cannot meet the ultra-short time interval measurement between Beidou satellite 1pps signals with a measurement resolution better than 10ps level, which greatly reduces The reliability of the Beidou satellite navigation system, as well as the timing and positioning service capabilities

Images