High-precision time-frequency synchronization signal distribution system and distribution method thereof

A time-frequency synchronization and distribution system technology, applied in the field of distributed systems, can solve the problems of reference signal phase noise deterioration, affecting synchronization accuracy between sub-stations, etc., achieve ultra-low time jitter, ultra-low phase noise, and reduce phase noise deterioration Effect

Pending Publication Date: 2022-04-26
NO 8511 RES INST OF CASIC
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Problems solved by technology

In the process of transmission from the master station to the slave station, the signal transmission link is susceptible to environmental interference, which deteriorates the phase noise of the reference signal and affects the synchronization accuracy between sub-stations

Method used

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  • High-precision time-frequency synchronization signal distribution system and distribution method thereof
  • High-precision time-frequency synchronization signal distribution system and distribution method thereof
  • High-precision time-frequency synchronization signal distribution system and distribution method thereof

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, in t...

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Abstract

The invention discloses a high-precision time-frequency synchronization signal distribution system and a distribution method thereof, which are characterized in that femtosecond optical pulses with ultra-low phase noise are used as system reference frequency sources and are distributed to all stations of a distributed system through optical fibers to serve as reference sources; extracting a picosecond-level high-precision time-frequency reference signal from the station through a time-frequency synchronization signal extraction technology based on an optical phase discriminator; in order to reduce phase noise deterioration caused by external environment interference on an optical fiber link between a master station and a slave station, an optical fiber stable-phase transmission technology based on a phase-locked loop and an optical fiber stable-phase transmission technology based on frequency mixing elimination are adopted, time jitter introduced by the link can be compensated and eliminated, ultra-low-phase-noise time-frequency reference signals are provided for all substations, and the system performance is improved. And the picosecond-level high-precision time-frequency synchronization among the stations is realized.

Description

technical field [0001] The invention belongs to the field of distributed systems, and in particular relates to a high-precision time-frequency synchronization signal distribution system and a distribution method thereof. Background technique [0002] In a distributed system, high-precision time-frequency synchronization signals are required to realize joint detection among distributed stations. High-precision time-frequency allocation and synchronization technology is one of the key technologies to support the innovative development of advanced scientific and technological fields such as radar detection systems, deep space detection networks, and very long baseline interferometry. The phase noise of the time-frequency synchronization signal is very important to the distributed system, which will determine the detection probability and detection distance of the target, and is one of the most important indicators in the advanced distributed detection system. [0003] The trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04B10/2507
CPCH04J3/0635H04J3/0617H04B10/2507
Inventor 聂海江冀贞海侯文栋赵昂然李贵显刘志武吴克钊朱晓丹吴昊
Owner NO 8511 RES INST OF CASIC
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