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A high-precision time synchronization method for satellite ground stations based on radio-over-optical networks

A wireless network and time synchronization technology, which is applied in the field of satellite navigation and optical wireless communication, can solve the problems that cannot meet the synchronization of large-scale satellite ground stations, increase the difficulty of site selection for satellite ground stations, etc.

Active Publication Date: 2021-06-08
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

However, the clock synchronization scheme requires the antenna to have a good view of the sky to ensure that the receiver can receive effective signals. This method increases the difficulty of site selection for satellite ground stations and cannot meet the needs of large-scale satellite ground stations to achieve synchronization

Method used

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  • A high-precision time synchronization method for satellite ground stations based on radio-over-optical networks
  • A high-precision time synchronization method for satellite ground stations based on radio-over-optical networks
  • A high-precision time synchronization method for satellite ground stations based on radio-over-optical networks

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[0031] In order to make it easier for those skilled in the art to understand the technical solution of this patent, and at the same time, in order to make the technical purpose, technical solution and beneficial effect of this patent clearer, and to fully support the protection scope of the claims, the following is a specific case in the form of this patent. The technical solution of the patent makes further and more detailed descriptions.

[0032] A high-precision time synchronization method for satellite ground stations based on radio-over-optical networks, which is applied to such figure 1 and 2 In the satellite navigation system shown, the satellite ground station part includes a control unit and a remote access unit, each satellite ground station corresponds to a remote access unit, and all remote access units are connected to the same control unit through optical fibers to form a ROF system. The procedure of this method is as follows image 3 As shown, it specifically...

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Abstract

The invention discloses a high-precision time synchronization method for a satellite ground station based on an optical wireless network, and belongs to the technical fields of satellite navigation and optical wireless communication. The invention utilizes the analog transmission characteristics in the optical wireless network to realize clock synchronization, improve synchronization accuracy and network transmission bandwidth, and avoid distortion and bandwidth waste caused by digital synchronization. Taking advantage of the flexible deployment of the ROF system, it can deploy satellite ground stations in places where radio frequency signals are difficult to reach, and improve the coverage area and synchronization accuracy of the satellite navigation system. In addition, the present invention adopts a time synchronization feedback optimization strategy to form a time synchronization closed loop, which can improve the accuracy of time synchronization.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and optical wireless communication, in particular to a high-precision time synchronization method for satellite ground stations based on optical wireless network. Background technique [0002] The Beidou satellite navigation system is a global satellite navigation system with independent intellectual property rights in my country. It is also known as the world's three major satellite navigation systems together with the US Global Positioning System and the Russian GLONASS satellite navigation system. The satellite navigation system is composed of space satellites, ground stations and users. The satellite ground station is an important part of the satellite communication system. Its main function is to receive signals from satellites, send signals to satellites and forward signals from other ground stations. . In order to ensure the positioning, communication and navigation quality of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04J3/06H04W56/00
CPCH04B7/18517H04J3/0638H04W56/001
Inventor 蔚保国王正勇王崇阳杨辉于奥
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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