Real-time satellite signal simulator based device for synchronously increasing and decreasing visible satellites and construction method thereof

Abstract

The invention discloses a teal-time satellite signal simulator based device for synchronously increasing and decreasing visible satellites and a construction method thereof. The device comprises an upper computer communication module, an information processing module and a bus information interaction module. The construction method comprises the following steps of: firstly, inputting initial simulation information into a system; secondly, judging whether the satellite is visible or not and establishing a visible satellite list; thirdly, transmitting channel state information and finishing theinitialization of each simulation channel; fourthly, judging visible stars in real time; fifthly, calculating visible satellite data information; sixthly, transmitting the information calculated in the fourth step and the fifth step to the signal processing module; seventhly, carrying out resetting and read latching on the simulation channels; eighthly, reading state information of the communication channels in real time and synchronously updating the state of each channel and inputting the initial simulation information; ninthly, latching and transmitting real-time simulation data of the channels back to the information processing modules; tenthly, synchronously changing the channel states by using a switch to control a state machine and realizing the real-time work of the simulator by repeating the steps from the fifth step to the tenth steps when each synchronously pulse approaches.

Description

technical field [0001] The invention relates to a satellite signal simulator, in particular to a device for synchronously increasing or decreasing visible satellites based on a real-time satellite signal simulator and a construction method thereof. It belongs to the technical field of satellite positioning and navigation. Background technique [0002] In the satellite navigation and positioning system, the navigation receiver is installed on the carrier, and the received signal contains the Doppler frequency shift caused by the carrier dynamics. At the same time, the signal propagates through space and is inevitably affected by various error sources. The state at the moment is different from the state at the moment of launch, and this difference is related to the position of the carrier, dynamic characteristics, measurement time, application environment, etc. As a key link and testing tool for the development of satellite navigation systems and various receiving equipment, ...

AI Technical Summary

Problems solved by technology

During the simulation process, satellites will inevitably increase or decrease. In this case, only by ensuring that the signal simulation channel of the new satellite or the disappearing satellite is completely synchronized with the timing of other normal signal simulation channels and that the position calculation is accurate can the entire simulator The system works normally, otherwise there will be signal simulation errors and signal step phenomena, which will greatly affect the simulation accuracy and work continuity of the simulator

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