High-precision timing system and high-precision timing method based on satellite navigation and Kalman filter

Abstract

The invention designs a high-precision timing system and a high-precision timing method based on satellite navigation and Kalman filter. The system comprises a data resolving portion and a timing filter portion. The data resolving portion adopts a traditional least square method to resolve positional information and clock error information of a Beidou second-generation receiver, then a Kalman filter is used for filtering the clock error information to obtain phase error information and frequency error information of a second signal generator, and initial phase and frequency meter digit of the second signal generator are regulated by the aid of the phase error information and the frequency error information, obtained by filtering, of the second signal generator, so that a high-prevision timing function is achieved. The system and the method solve the problems that timing precision under conditions of the prior art is poor, and the second signal generator is easily affected by crystal oscillator frequency errors.

Description

technical field [0001] The present invention relates to the field of satellite navigation and communication, specifically a high-precision timing system and method based on satellite navigation and Kalman filtering, which uses Kalman filtering technology and satellite navigation to correct the phase error and frequency error of the second signal generator to realize High-precision timing function. Background technique [0002] In recent years, with the development of satellite navigation systems, satellite navigation systems have played an increasingly important role in daily work and life. The satellite navigation system can solve the clock error information of the local receiver while realizing the positioning and speed fixing functions, and use the local error information to correct the phase information of the second signal generation circuit of the receiver to realize the timing Function. However, the traditional timing system is affected by the positioning accuracy, ...

AI Technical Summary

Problems solved by technology

However, the traditional timing system is affected by the positioning accuracy, and there is a large jitter

At the same time, the traditional timing method does not consider the impact of the crystal oscillator error on the second signal, which further reduces the accuracy of the timing system

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