Satellite navigation signal simulator calibration and timing type receiver delay device and method

Abstract

The invention relates to a satellite navigation signal simulator calibration and timing type receiver delay device and method. Satellite navigation signals are used in the device and method for simulating and generating standard satellite navigation signals, a detected receiver receives and calculates the signals, a path of pulse-per-second signals is restored, the pulse-per-second signals and pulse-per-second signals output by a simulator are simultaneously transmitted to a high-precision time interval counter to be compared, the delay difference value of the two paths of pulse-per-second signals is obtained in a measurement mode, then the influence of the delay of the simulator, the delay of a cable and the like is removed, and the delay of the detected receiver is obtained. The method and device can overcome the defects of the error and uncertainty accumulation of a comparison method, can overcome the manual observation errors introduced when the delay of the simulator is measured with an oscilloscope method, improve the accuracy of simulator delay measurement and reduce the uncertainty of a measurement result.

Description

technical field [0001] The invention relates to a time delay calibration method, a time delay device and method for calibrating a timing type receiver by a satellite navigation signal simulator. Background technique [0002] The satellite navigation signal simulator is a high-precision standard signal source, which can simulate and generate each satellite signal received by the receiver, and provides a simulation environment for the development and testing of the navigation receiver. It is a necessary aid 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 navigation receiver. [0003] Timing and positioning information of timing navigation receivers are obtained based on pseudorange measurements. The receiver completes the measurement of the pseudo-range by performing correlation calculations on the reproduced sig...

AI Technical Summary

Problems solved by technology

One of the difficulties is the delay calibration of the simulator itself. The existing method is to use a high-speed sampling storage oscilloscope to send one radio frequency signal and one second pulse signal of the satellite navigation signal simulator to the two channels of the oscilloscope to measure The time delay difference between the satellite signal code phase inversion point and the rising edge of the second pulse, but the observation error of this method is relatively large, and the observation and judgment of the code phase inversion point of the navigation signal by human eyes has a strong subjective consciousness , can not guarantee the standardization of the calibration operation

Images