Method for realizing real-time closed-loop synchronization control by simulating satellite navigation signal

Abstract

The invention relates to a method for realizing real-time closed-loop synchronization control by simulating a satellite navigation signal. The method comprises the following steps that: a simulator generates a synchronization trigger signal and calculates first frame carrier motion trail data to generate a motion parameter; simulation software calculates the current position and parameter of a satellite in real time after receiving a first frame motion parameter so as to generate a satellite data parameter and transmits the satellite data parameter to a navigation signal simulator in real time; the navigation signal simulator performs simulation and synchronization control on the signal according to the satellite data parameter so as to generate a simulation navigation signal; a receiver performs demodulating and positioning resolving on the signal and feeds a resolving result back to the simulator; and the simulator continues simulating according to the step length of a system and performs closed-loop control according to the transmitted position information. In the method of the invention, the motion trail of a carrier can be received in real time through data navigation simulation software, so that the problems of real-time trail modification, lack of a feedback loop and the like in the conventional open-loop system are solved.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a method for realizing real-time closed-loop synchronous control of analog satellite navigation signals. Background technique [0002] The satellite navigation signal simulation system is widely used in the development, testing and maintenance activities of various radio frequency electronic systems. The satellite signal simulation system is used in the construction process of domestic and foreign navigation systems. A typical navigation simulation system, such as a GPS signal simulator, can output synthetic radio frequency simulation signals containing various characteristics. [0003] At present, there are global satellite navigation systems such as American GPS, Russian GLONASS (Glonass), European Union Galileo (Galileo), and my country's "Beidou-2". Users can use multiple systems to effectively combine to achieve global navigation Compatible with navigation posit...

AI Technical Summary

Problems solved by technology

For those applications with uncertain trajectories, this mode is relatively simple compared with the test method, and cannot solve the problem of real-time modification of trajectories.

The disadvantage of this method is that the navigation signal simulator cannot be connected with the simulator, nor can it adjust the carrier trajectory, resulting in the incomplete function of the navigation signal simulator, which cannot be applied to a more detailed model simulation process.

When the simulator performs system simulation, it also lacks the important feedback loop of satellite navigation signals.

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