Pilot-frequency high-precision rubidium atomic frequency standard generation system based on Beidou satellite signals

Abstract

The invention discloses a pilot-frequency high-precision rubidium atomic frequency standard generation system based on Beidou satellite signals. The pilot-frequency high-precision rubidium atomic frequency standard generation system comprises a satellite receiving module, a clock error measurement module, a data processing module, a rubidium atomic clock module, a pilot-frequency phase control module, a display module and a power module. The signal output end of the satellite receiving module is connected with the signal input end of the clock difference measuring module, the signal output end of the clock difference measuring module is connected with the signal input end of the data processing module, and the signal output end of the data processing module is connected with the signal input end of the rubidium atomic clock module. The signal output end of the rubidium atomic clock module is connected with the signal input end of the clock difference measuring module and the signal input end of the pilot frequency phase control module. The signal output end of the pilot frequency phase control module is connected with the signal input end of the display module. By means of the pilot frequency phase control technology, the stability and accuracy of the rubidium atomic frequency standard can be greatly improved, the stability and reliability of the system are enhanced, and the requirements of high-precision time frequency measurement users in the field of Beidou satellite positioning service are completely met.

Description

technical field [0001] The invention relates to a frequency standard generating system, in particular to a system for generating a frequency-differential high-precision rubidium atomic frequency standard based on Beidou satellite signals. Background technique [0002] In Beidou + 5G communication, Beidou + artificial intelligence and other Beidou + applications (i.e. Beidou services), Beidou time-frequency information measurement equipment has higher and higher requirements for the accuracy and stability of time-frequency standards. For example, modern power transmission networks require time Accuracy is less than ±1us, frequency accuracy is better than ±1×10 -11 , the modern high-speed digital communication system requires the time accuracy of clock synchronization to be less than ±0.5us, and the frequency stability to be better than ±5×10 -12 Wait. [0003] The current high-precision time-frequency standards are mainly primary frequency standards such as cesium atomic fr...

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Problems solved by technology

[0003] The current high-precision time-frequency standards are mainly primary frequency standards such as cesium atomic frequency standards and hydrogen atomic frequency standards, but the high price and high environmental requirements limit their wide application. Therefore, in Beidou high-precision positioning and position In the service, secondary frequency standards with relatively superior performance and relatively cheap prices, such as rubidium atomic frequency standards and high-stability crystal oscillators, have become the first choice of users.

Usually, the system frequency standard based on a single rubidium atomic clock has high accuracy but relatively low short-term stability. The frequency standard based on a single crystal oscillator system has good short-term stability but relatively low accuracy. The secondary frequency standard is generally There are frequency offset and aging problems, which cause the output results to gradually deviate from the standard time-frequency, which cannot meet the high-precision requirements of Beidou time-frequency measurement users

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