A satellite payload distributed time synchronization method and system

A time synchronization system and time synchronization technology, applied in the field of satellite navigation, can solve the problems of inability to monitor and adjust, poor real-time performance, and many sources of synchronization accuracy errors.

Active Publication Date: 2021-04-16
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

This type of method is mainly used for measurement and uses back-end digital processing to compensate and offset, so as to realize the time synchronization of each station. It has poor real-time performance and many error sources introduced by synchronization accuracy, and cannot independently monitor and adjust abnormalities.

Method used

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  • A satellite payload distributed time synchronization method and system
  • A satellite payload distributed time synchronization method and system

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Embodiment Construction

[0030] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0032] In order to achieve the above object, the present invention proposes a satellite load distributed synchronization method and system, the principle block diagram is as follows figure 1 shown. The system includes a reference frequency generating and maintaining unit, a central processing unit and distributed nodes, and the number of distributed nodes can be expanded as required. The method includes three parts: the generation and maintenance of the reference frequency, the processing of the cen...

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Abstract

The invention discloses a satellite load distributed time synchronization method and system. The system includes a reference frequency generating and maintaining unit, a central processing unit and distributed nodes. The number of distributed nodes can be expanded according to requirements. The method includes three parts: the generation and maintenance of the reference frequency, the processing of the central processing unit and the processing of the distributed nodes. The processing of the central processing unit includes generating the reference epoch and synchronous clock according to the received reference frequency, and counting on the basis of the reference epoch, generating and maintaining the reference time; distributing the reference epoch, synchronous clock and reference time to each distribution type node; receive the content returned by each distributed node, and determine whether there is an abnormal node or whether the central processing unit is abnormal by comparing the content returned by each distributed node. Combined analysis, get the correct result, and automatically adjust the abnormal part.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a satellite load distributed time synchronization method and system. Background technique [0002] At present, the research on time synchronization methods is mainly to realize long-distance time synchronization, mainly including between satellites and ground stations, between multiple ground stations, and between various vehicle-mounted and airborne equipment. Related methods are mainly implemented through two-way wireless ranging, high-speed optical fiber transmission, etc., so as to ensure time synchronization between long-distance devices. This type of method is mainly used for measurement and uses back-end digital processing for compensation and offset, so as to realize the time synchronization of each station. It has poor real-time performance and many error sources introduced by synchronization accuracy, and cannot monitor and adjust abnormalities independently. Conte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04J3/06H04L29/08
CPCH04B7/18519H04J3/0617H04J3/0641H04L67/1095H04L67/1097
Inventor 陈林郭少彬李杨熊钍林周袆郭峥杨宇高帅和
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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