Timing Receiver Hardware Delay Calibration Method and System Based on Clock Compensation

Abstract

The invention discloses a timing receiver hardware delay calibration method and system based on clock error compensation. The method is suitable for a timing receiver whose observation value extraction time is synchronized with 1PPS. According to the signal processing process of the timing receiver, a timing receiver is proposed. The delay division method emphasizes that different frequency satellite signals produce different hardware delays. On this basis, an improved hardware delay measurement scheme based on clock offset compensation is proposed, and a common clock test system for timing receivers and satellite navigation signal simulators is built. High-rate high-precision oscilloscopes measure satellite navigation simulators, measure simulator delays, use carrier phase to smooth pseudo-ranges, and distinguish the frequencies of received satellite signals to resolve clock differences, thereby improving the accuracy of timing receiver hardware delay calibration.

Description

technical field [0001] The invention belongs to the technical field of global navigation satellite systems (Global Navigation Satellite System, GNSS), in particular to a hardware delay calibration method of a GNSS timing receiver based on clock error compensation. Background technique [0002] Many infrastructures in the fields of communication, electric power, finance, and national defense are based on time synchronization. Now more and more high-tech applications require higher and higher time synchronization accuracy. Time comparison using satellite navigation system (GNSS) can achieve nanosecond-level time synchronization accuracy, but usually only time comparison between two nodes can be performed, and the comparison results are lagging. This type of technology is mainly used by time-frequency The laboratory is used for time transfer, not suitable for large-scale use. Time synchronization through GNSS timing has the advantages of low cost, real-time, unlimited number o...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of insufficient accuracy of the traditional hardware delay calibration method, the present invention provides a hardware delay calibration method based on the clock error compensation of the timing receiver, which is suitable for the timing receiver whose observation value extraction time is synchronized with 1PPS

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