System and method for self time-delay calibration of satellite navigation signal simulator

Abstract

The invention relates to a system and a method for self time-delay calibration of a satellite navigation signal simulator. The system comprises the satellite navigation signal simulator, high-speed acquisition equipment, an isolated distribution amplifier and a calculating device, wherein the isolated distribution amplifier divides external clock signals into first channel clock signals and second channel clock signals; the satellite navigation signal simulator outputs second pulse signals and radio frequency stimulation signals with the first channel clock signals which come from the isolated distribution amplifier serving as working clocks; the high-speed acquisition equipment acquires the second pulse signals and the radio frequency stimulation signals with the second channel clock signals serving as sampling clocks; and the calculating device is used for calculating time-delay differences between initial code phases of the radio frequency stimulation signals and second pulse rising edges to obtain the time delay of the satellite navigation signal simulator. According to the system and the method, defects of oscilloscope measurement methods can be overcome, and the calibration resolution can be within 1ns.

Description

technical field [0001] The invention relates to a time delay calibration system and method, in particular to a system and method for self time delay calibration of a satellite navigation signal simulator. Background technique [0002] With the development of global satellite navigation and positioning technology, its theory and technology are becoming more and more perfect, and have been widely used in geodesy, time transfer and other navigation and positioning services. The satellite navigation signal simulator is a high-precision standard signal source, which can simulate the satellite signals received by the navigation receiver, and provides a simulation environment for the development and testing of the navigation receiver. It is an essential auxiliary for the design of the navigation receiver. tool. The navigation signal simulator can also generate navigation signals under specific conditions for testing and verifying various performances and indicators of the navigati...

AI Technical Summary

Problems solved by technology

However, due to the strong subjective consciousness of using human eyes to observe and judge the code phase reversal point of the navigation signal on the oscilloscope interface, certain errors will be introduced, and the standardization of the calibration operation cannot be guaranteed.

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