Satellite signal positioning method and system based on dynamic fingerprint of 3D modeling scene
A satellite signal and scene dynamic technology, applied in the field of satellite signal positioning, can solve the problems of low positioning accuracy, difficulty, difference in signal loss, etc., and achieve the effects of high positioning accuracy, small positioning error and simple method.
Active Publication Date: 2017-11-10
SHANGHAI JIAOTONG UNIV
View PDF4 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Triangulation technology has the advantages of convenience, quickness, and small workload, but it largely depends on the signal transmission loss model. However, the signal loss at different locations varies greatly and is difficult to determine, so it is difficult to implement
However, this technology only uses signal strength as a reference, the positioning accuracy is not high, and the signal strength is easily disturbed by the environment, so only using signal strength to achieve positioning, its positioning accuracy is not ideal
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0031] In this embodiment, the balcony of the Microelectronics Building of Shanghai Jiaotong University (as shown in Figure 2 (a)) is used as the experimental scene, and the ray tracing model is used to generate the 3D model of the actual scene (as shown in Figure 2 (b)) in the MATLAB simulation software, and the calculated reception Signal parameters, build a fingerprint database, and implement matching positioning.
[0032] The concrete implementation process of this method is as follows:
[0033] 1) First, use the ray tracing model to model the experimental scene, and set the corresponding parameters. Set the satellite signal frequency as 1.56GHZ, the satellite altitude as 22000km, and the satellite signal transmission power as 478.63dBW.
[0034] In this embodiment, the bottom surface of the model is used as the receiving area, the upper left corner of the ground is used as the coordinate origin, and the three sides of the intersection are respectively the x-axis, y-axis a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a satellite signal positioning method and a system based on 3D modeling scene dynamic fingerprints. The transmission path of satellite signals is predicted by the adoption of a ray tracing model, the meshing division of a receiving area is performed, the central point of each mesh serves as a sampling point, parameter information of each signal reaching each sampling point is calculated to form a fingerprint database, a characteristic vector of a certain target point is obtained, the characteristic vector and the fingerprint database are finally matched, the sampling point with the minimum Euclidean distance is found out, and the position coordinate of the sampling point is the coordinate of the estimated target point. According to the method and the system, the operation is simple, the realization is easy, the positioning accuracy can be effectively improved, and the positioning errors can be reduced.
Description
technical field [0001] The present invention relates to a method in the technical field of satellite signal positioning, in particular to a satellite signal fingerprint positioning method and system that uses a three-dimensional ray tracing model to model an actual scene and track the propagation path of a signal, and is used for calculation and analysis The characteristics of satellite reception signals to achieve positioning, and can be used to improve the positioning accuracy of satellite signals and reduce positioning errors. Background technique [0002] At present, the three-dimensional ray tracing model is widely used in the radio wave prediction of mobile communication and personal communication. By modeling the actual scene, it can be used to predict all possible ray paths between the transmitter and the receiver. The ray tracing method is based on electromagnetic theory, geometric optics theory and coherent diffraction theory, and determines all paths from the tran...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01S11/02
CPCG01S11/02
Inventor 杨丽何迪
Owner SHANGHAI JIAOTONG UNIV