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High-precision remote time synchronization method

A technology of time synchronization and time synchronization system, applied in time division multiplexing system, electrical components, multiplexing communication and other directions, can solve problems such as low synchronization accuracy, poor synchronization real-time performance, and easy interference.

Inactive Publication Date: 2014-01-15
中国航天科工集团第二研究院二〇三所
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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-precision remote time synchronization method to solve the problems of low synchronization accuracy, poor real-time synchronization, and susceptibility to interference of the GPS-based time synchronization method.

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Embodiment Construction

[0038] The specific steps of a high-precision remote time synchronization method are:

[0039] The first step is to build a high-precision time synchronization system

[0040] A high-precision time synchronization system, including: a master station 1 and multiple slave stations. Master station 1, including: master atomic clock 8, master time frequency synthesizer 9, master time comparison modem 10, master satellite communication transceiver 11, master satellite communication antenna 12 and link switching module 13; slave station, including: slave atomic clock 14. From the time-frequency synthesizer 15 , from the time comparison modem 16 , from the satellite communication transceiver 17 , from the satellite communication antenna 18 and the time difference data collection forecasting module 19 .

[0041] A satellite two-way time comparison link is established between the master station 1 and the slave station through geosynchronous satellites.

[0042] In the master station 1...

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Abstract

The invention discloses a high-precision remote time synchronization method. A high-precision time synchronization system, a main station (1) and auxiliary stations are built to carry out time comparison and the auxiliary stations are used for forecasting local time differences. Thus, time synchronization of the main station (1) and a single auxiliary station is completed. All the auxiliary stations and the main station (1) sequentially undergo circulating comparison and time different forecasting and eventually, time synchronization of the auxiliary stations and the main station is achieved. The technology of satellite double-direction time comparison and combination of time division comparison and time difference forecasting is utilized, real-time nanosecond-class time synchronization among stations is achieved, the system is independent and not prone to interference and various defects based on a GPS time synchronization method are effectively overcome.

Description

technical field [0001] The invention relates to a time synchronization method, in particular to a high-precision remote time synchronization method. Background technique [0002] High-precision time synchronization refers to the use of various technical means to accurately align the time of two or more clock outputs at a certain distance. It has important application value in the fields of bistatic or multistatic radar and radio navigation. The basis for precision ranging and localization. Traditional time synchronization is mostly realized by methods such as GPS or ground-based long-wave timing. The long-wave time synchronization method demodulates the time synchronization information by receiving the signal transmitted by the BPL long-wave timing station or the Changhe No. 2 ground-based navigation station. The long-wave synchronization method is not accurate. The ground wave can generally reach the microsecond level, and the sky wave can only reach On the order of milli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 张升康王宏博杨军冯克明
Owner 中国航天科工集团第二研究院二〇三所
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