Method for unidirectionally synchronizing transmission time frequency

Abstract

The invention discloses a method for unidirectionally synchronizing transmission time frequency. Through utilization of the method, the high-precision time frequency synchronization problem between amaster station and a secondary station can be effectively solved. The method is realized by the following technical scheme that the master station and the secondary station realize inter-station relative distance high-precision measurement through satellite navigation relative positioning; the master station measures surrounding parameters through utilization of a meteorograph, precisely evaluatestransmission path atmosphere delay, takes own rubidium clock as a reference clock, generates a spread spectrum distance measurement signal through a spread spectrum distance measurement signal moduleand transmits the spread spectrum distance measurement signal to the secondary station through a transmitting radio frequency front end and an antenna; and the secondary station captures and tracks the spread spectrum distance measurement signal and sends a code frequency control word output by a code loop filter to a direct digital synthesizer DDS, phase detection is carried out on an output sinusoidal wave signal and a constant temperature crystal oscillator of a phase-lock loop of the secondary station, and frequency synchronization of the constant temperature crystal oscillator of the secondary station and the rubidium clock of the master station is realized through application of a high-precision reference clock output by the constant temperature crystal oscillator.

Description

technical field [0001] The invention relates to a high-precision one-way time-frequency synchronization method applicable to nanosecond level time synchronization accuracy in technical fields such as ground-based regional navigation and network radar. Background technique [0002] Time is the most mysterious basic physical quantity by human consciousness. From the sunrise and sunset of ancient people, to the geocentric theory and heliocentric theory, to the theory of relativity and the big bang theory, human beings have never stopped exploring the essence and origin of time. How to continuously improve the measurement accuracy of the basic physical quantity "time" has always been one of the important goals that human beings relentlessly pursue. With the rapid development of modern high-precision atomic clocks, the accuracy of time measurement has been far ahead of the measurement accuracy of other physical quantities, and has become the basic unit with the highest measureme...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that two-way measurement is required to realize the time and frequency synchronization scheme of the two stations, the system is relatively complex, and the clocks of the master and slave stations are required to be of the same order of magnitude, and the cost of the networking system is relatively high

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