A Time-Frequency Transfer Method and System for Active-Passive Composite Phase Compensation

Abstract

The invention discloses a time-frequency transfer method and system for active-passive composite phase compensation, and belongs to the technical field of time-frequency transfer. The present invention realizes high-precision and high-stability time-frequency transmission by adopting a phase conjugate passive phase noise compensation mechanism for frequency transmission and an active phase delay compensation mechanism for time transmission. The invention can effectively improve the time-frequency transmission accuracy and simplify the complexity of the current transmission device.

Description

technical field [0001] The present invention relates to the technical field of time-frequency transmission and measurement and control between remote high-precision time service stations, in particular to the time-frequency synchronization technology between ground stations, between ground stations and satellite and constellation distributed networking systems, and in particular to an active-passive composite Time-frequency transfer method and system for phase compensation. Background technique [0002] The generation and transmission of time frequency has extremely important applications in daily life, communication measurement and control, scientific research, national defense industry and other fields. The high-frequency oscillation frequency generated by the current atomic clock has an accuracy of 10 -16 The order of magnitude is the time-frequency benchmark in the fields of navigation, communication, measurement and control, etc. The cold atomic optical clock has the ...

AI Technical Summary

Problems solved by technology

This method is very dependent on the accuracy and bandwidth of the feedback loop, and has high cost and poor environmental adaptability; in the process of time synchronization, limited by the current development level of electronic devices, it is difficult for the synchronization accuracy to exceed the level of picoseconds

Benefiting from the extremely low phase noise and extremely short time-resolution pulse of the optical frequency comb, the bidirectional time-frequency transfer technology of the mode-locked optical frequency comb can obtain femtosecond-level time synchronization accuracy and 10 -18 / d frequency stability, however, the complexity of the system is too high, basically can only be realized in a highly stable laboratory environment, in addition expensive equipment and maintenance costs limit the application range of the system

The construction of a high-precision time-frequency network system requires time-frequency transmission equipment to have the characteristics of high precision, reconfigurability, strong environmental adaptability, and low construction and maintenance costs. However, the current time-frequency transmission systems are still difficult to take into account all the above characteristics

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