Star Network Time Frequency Synchronization System and Synchronization Method
A technology of time-frequency and star-shaped network, which is applied in star-shaped/tree-shaped network, star-shaped electromagnetic network, time-division multiplexing system, etc., can solve the problems of frequency signal phase inconsistency, etc. The effect of saving resources
Active Publication Date: 2020-04-03
SHANDONG UNIV
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[0007] The present invention aims at the above-mentioned problems such as the inconsistency of the frequency signal phase in the sampling of the existing high-frequency radio telescope array, and provides a star-shaped network time-frequency synchronization system and synchronization method, which transmits the time signal and the frequency signal at the same time and compensates at the same time to achieve high precision The time-frequency synchronization and the phase of the frequency signal are consistent
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[0037] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.
[0038] see figure 1 , the present invention provides a star network time frequency synchronization system, comprising a master station, a slave station and a plurality of transmission optical fibers 1 connecting the master station and the slave station, the master station includes a central clock 21, and the center A plurality of wavelength division multiplexers I22 connected to the clock 21, a time interval measurement module 23 connected to the wavelength division multiplexer I22, a main control module 24 connected to the time interval measurement module 23, and a main control module 24 connected to the main control A plurality of delay lines 25 connected to the module 24, each wavelength...
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The present invention relates to a star network time frequency synchronization system and synchronization method. The synchronization system includes a master station, a slave station and a plurality of transmission optical fibers connecting the master station and the slave station. The master station includes a central clock and a central clock A plurality of wavelength division multiplexers I connected, a time interval measurement module connected with the wavelength division multiplexer I, a main control module connected with the time interval measurement module, and a plurality of delay lines connected with the main control module, each wave The multiplexer Ⅰ is connected to a delay line, and each delay line is connected to a transmission fiber. The number of wavelength division multiplexer Ⅰ and delay lines is the same as the number of transmission fibers; the slave station includes multiple wavelength division multiplexers Ⅱ and multiple The number of user terminals, the number of wavelength division multiplexer II and the number of user terminals is the same as the number of the transmission fiber, each wavelength division multiplexer II is connected to one transmission fiber, and each user terminal is connected to a wavelength division multiplexer II. In the present invention, the time and frequency signals are transmitted and compensated at the same time, the time and frequency synchronization precision is high, and the phases of the frequency signals are consistent.
Description
technical field [0001] The invention belongs to the technical field of time-frequency synchronization, and relates to network time-frequency synchronization technology, in particular to a star-shaped network time-frequency synchronization system and synchronization method, which are used to realize time-frequency synchronization when sampling high-frequency radio telescope arrays. Background technique [0002] At present, there are many studies on optical fiber video transmission systems, but they all focus on solving the problems of time synchronization and frequency synchronization. Common methods for time-frequency synchronization include the loopback method and the two-way comparison method, both of which can achieve high-precision time-frequency synchronization. In most time-frequency synchronization systems, the transmission of the time signal and the frequency signal are compensated separately, requiring many and auxiliary devices. For some schemes that involve consi...
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IPC IPC(8): H04J3/06H04B10/272H04L12/44H04L7/00
CPCH04B10/272H04J3/0638H04L7/00H04L12/44
Inventor 严发宝刘宇晴陈耀武昭苏艳蕊
Owner SHANDONG UNIV