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Time synchronization system and method of satellite signal simulator, and satellite signal simulator

A satellite signal and simulator technology, applied in the field of satellite navigation, can solve problems such as low accuracy, and achieve the effects of improving correlation, improving simulated positioning accuracy and generating simulated second pulse accuracy.

Active Publication Date: 2020-04-14
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0004] The purpose of this application is to provide a time synchronization system and method for a satellite signal simulator and a satellite signal simulator, aiming to solve the problem of low accuracy in adjusting the local clock by means of counting

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  • Time synchronization system and method of satellite signal simulator, and satellite signal simulator
  • Time synchronization system and method of satellite signal simulator, and satellite signal simulator
  • Time synchronization system and method of satellite signal simulator, and satellite signal simulator

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Embodiment Construction

[0029] In order to make the purpose, technical solutions, and beneficial effects of the present application clearer, the following further describes the present application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the application, but not to limit the application.

[0030] In order to illustrate the technical solution described in the present application, specific embodiments are used for description below.

[0031] See figure 1 , The time synchronization system of the satellite signal simulator provided by an embodiment of the present application includes a satellite signal simulator 11, a satellite signal receiver 12, and a host computer 13. The satellite signal simulator 11 includes a DSP module 111 and an FPGA module 112 electrically connected in sequence , The first digital-to-analog conversion module 113, the radio frequency module 114 and the antenna 11...

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Abstract

The invention is applicable to the field of satellite navigation, and provides a time synchronization system and a method of a satellite signal simulator, and the satellite signal simulator. The method comprises the following steps: receiving a real satellite signal through a satellite signal receiver, generating a second pulse signal, and transmitting the second pulse signal to an FPGA module ofa satellite signal simulator; performing coarse counting on the second pulse signal by the FPGA module by using the clock signal to obtain a coarse time interval difference between a clock generated by the local crystal oscillator and a satellite clock; performing carry chain fine counting by the FPGA module by constructing a carry chain according to the rough time interval difference, and calculating an accurate difference value between a clock rising edge and a pulse per second rising edge, thereby obtaining an accurate time interval between a local clock and a satellite clock; and correcting the frequency of the local crystal oscillator in a crystal oscillator taming mode by the FPGA module according to the accurate time interval, so that the local crystal oscillator generates an optimized clock signal. According to the method, synchronization with a real pulse per second signal is achieved, and correlation between the satellite signal simulator and a real satellite is enhanced.

Description

Technical field [0001] This application belongs to the field of satellite navigation, and in particular relates to a time synchronization system and method of a satellite signal simulator, and a satellite signal simulator. Background technique [0002] Time is one of the seven basic physical constants. It is one of the physical quantities that can be measured with ultra-high precision at present. Therefore, time synchronization technology is a key technology in the field of satellite navigation. More accurate time information means higher positioning accuracy. When designing a satellite signal simulator, real-time synchronization between the satellite signal simulator and the real signal in the sky through time synchronization technology can make the designed satellite signal simulator more accurate. [0003] The prior art provides a GPS simulation system based on Beidou satellite positioning and timing, which is composed of a Beidou timing receiver, a clock taming module, a local ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/14G04R20/02
CPCG01S19/14G04R20/02
Inventor 陈小毛刘纯斐
Owner GUILIN UNIV OF ELECTRONIC TECH
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