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Satellite navigation system principle simulation method and satellite signal simulator

A technology of satellite navigation system and simulation method, which is applied in the direction of simulator, general control system, control/regulation system, etc., can solve the problems of high technical difficulty, troublesome implementation, poor real-time performance, etc., and achieve the effect of low simulation cost

Active Publication Date: 2012-10-17
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The software-based satellite signal simulator is limited by the computer hardware, resulting in poor real-time performance, and the algorithm that is closely related to time cannot be verified, and it is not suitable for long-term simulation testing; the satellite signal simulator based on the combination of software and hardware, the simulator The architecture of the system is relatively complex, the implementation is more troublesome, the technology is difficult, the scalability is extremely low, and the cost of researching navigation and positioning algorithms is extremely high

Method used

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  • Satellite navigation system principle simulation method and satellite signal simulator
  • Satellite navigation system principle simulation method and satellite signal simulator
  • Satellite navigation system principle simulation method and satellite signal simulator

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Comparison scheme
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Embodiment 1

[0058] Embodiment 1 of the present invention proposes a method for simulating the principle of a satellite navigation system, the process of which is as follows figure 1 shown, including:

[0059] Step 101, obtaining the simulation time, and receiving the current coordinates and motion model of the carrier;

[0060] Step 102, obtaining the ephemeris information of the satellite, and obtaining the orbit of the satellite according to the ephemeris information;

[0061] Step 103, determine the visible satellites in the simulation process according to the simulation time, ephemeris information, carrier position and preset cut-off elevation angle, and calculate the transmission time of satellite signals;

[0062] Step 104, obtain the navigation message according to the ephemeris information, and output the navigation message and signal transmission time as a quasi-real-time signal;

[0063] Step 105, using the spreading code and carrier intermediate frequency to modulate the navi...

Embodiment 2

[0066] Embodiment 2 of the present invention proposes a satellite navigation system principle simulation method, which is improved on the basis of Embodiment 1.

[0067] It should be noted that, in this embodiment, the carrier is a simulated satellite signal receiving device in the satellite navigation simulation system, that is, an object to be positioned or an object receiving navigation services.

[0068] Such as figure 2 and image 3 As shown, the method specifically includes:

[0069] Step 201, obtain the simulation time, and receive the motion characteristic information of the carrier, including the current coordinates and motion model of the carrier;

[0070] Among them, the motion model of the carrier is related to time, which can be set to different modes by the user:

[0071] 1) Static; 2) Uniform linear motion; 3) Accelerated motion; 4) Complicated models obtained from the above three combinations, etc.

[0072] Correspondingly, the coordinates and velocity of ...

Embodiment 3

[0157] Such as Figure 9 As shown, Embodiment 3 of the present invention provides a satellite signal simulator, which specifically includes:

[0158] The first obtaining module 301 is used to obtain the simulation time and receive the current coordinates and motion model of the carrier;

[0159] The second obtaining module 302 obtains the ephemeris information of the satellite, and obtains the orbit of the satellite according to the ephemeris information;

[0160] The time calculation module 303 is used to determine the visible satellite of the simulation process according to the simulation time, ephemeris information, carrier position and preset cut-off elevation angle, and calculate the transmission time of the satellite signal;

[0161] The quasi-real-time signal output module 304 is used to obtain the navigation message according to the ephemeris information, and output the navigation message and signal transmission time as a quasi-real-time signal;

[0162] The intermed...

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Abstract

The present invention relates to a satellite navigation system principle simulation method and a satellite signal simulator, belonging to the satellite navigation simulation field. According to the satellite navigation simulation method provided by the invention, the satellite signal simulator can output two formats of signals which are an intermediate frequency signal and a quasi-real-time signal, wherein the real-time performance of the intermediate frequency signal is poor, the intermediate frequency signal can be used for tracking and capture verification with a loose requirement for the real-time performance, the quasi-real-time signal can be used for verifying an algorithm with a strict requirement for the real-time performance, the simulation of a satellite navigation system principle and the verification of the algorithm can be completed based on a software framework, and at the same time, the simulation cost is low.

Description

technical field [0001] The invention relates to the field of satellite navigation simulation, in particular to a satellite navigation system principle simulation method and a satellite signal simulator. Background technique [0002] The application range of GNSS (Global Navigation Satellite System) has penetrated into many fields such as surveying and mapping, communication, military, aerospace, electric power, remote sensing, etc., and has become one of the important indicators to measure a country's comprehensive national strength. The compatibility and interoperability of multiple systems can provide users with better constellation coverage performance. By effectively combining navigation satellites between different systems for PVT (Position, Velocity and Time, position, velocity, and time) calculations, the geometry is greatly reduced. Precision factor and pseudo-range measurement error, so as to provide users with PNT (Positioning, Navigation and Timing, positioning, n...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 邓中亮孙刚杨磊徐连明张璐李晓敏尹露
Owner BEIJING UNIV OF POSTS & TELECOMM
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