High-precision time-frequency signal dynamic control method based on residual correction

Abstract

The present invention provides a high-precision time-frequency signal dynamic control method based on residual correction, the residual serves as the correction amount to correct the time difference model and the adjustment amount, the time difference prediction precision is improved, under the active condition, the synchronization precision with a reference source is effectively improved, and under the passive condition, through adoption of the dynamic control method, phase deviation caused by signal frequency deviation and aging is avoided to the maximum extent, so that the phase of the signal source changes slowly and stably, signal self-maintenance is further realized, high-precision synchronization of the signal source and the reference source is ensured, and the problems that the performance of the system is reduced and services and tests cannot be provided normally due to abnormality of the reference source are solved.

Description

technical field [0001] The invention relates to a dynamic control method for generating and maintaining high-precision time-frequency signals under the condition of effectively improving forecasting accuracy by using residual error correction. Background technique [0002] With the development of science and technology, the demand for time precision in various industries has increased from milliseconds and microseconds to nanoseconds or even femtoseconds. For example, in the global satellite navigation system, the time-frequency reference of the ground segment needs to maintain high-precision time synchronization with the national standard time; the ultra-high-precision time synchronization technology in 5G communication improves the time synchronization accuracy between the original base stations from hundreds of nanoseconds to 10 nanoseconds; In the observation, the VLBI very long baseline interferometry technology, the higher the time synchronization accuracy, the better ...

AI Technical Summary

Problems solved by technology

When the atomic clock is not controlled by the outside world and runs freely, affected by the frequency deviation and frequency drift aging of the atomic clock, its output signal will undergo frequency hopping and phase jitter over time and the external environment, which will affect the frequency stability and frequency accuracy of the signal. degrees, resulting in measurement deviation or positioning deviation of the measurement system or navigation system applying this signal

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