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Wireless positioning method and device on basis of virtual anchor points and terminal

A wireless positioning and virtual anchor technology, applied in the field of wireless communication, can solve the problems of large GPS signal attenuation, inaccurate cellular positioning, and impossibility of precise positioning in the industry, so as to reduce positioning errors and solve the effect of insufficient number

Active Publication Date: 2015-04-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in indoor or dense urban areas, due to the large attenuation of the GPS signal, it is impossible to search for enough 4 satellites, and the GPS positioning cannot be completed, which restricts the positioning function
[0006] Usually, in dense urban areas and indoors, the coverage environment of the cellular network is obviously better than that of satellite signals, but due to factors such as NLOS (Non Line of Sight, non-line-of-sight), multipath and other factors will also cause inaccurate cellular positioning. , research technicians in this field have also proposed some research results in this regard, but these research results are all based on ideal assumptions, and cannot be industrially feasible in terms of precise positioning.

Method used

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  • Wireless positioning method and device on basis of virtual anchor points and terminal
  • Wireless positioning method and device on basis of virtual anchor points and terminal
  • Wireless positioning method and device on basis of virtual anchor points and terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Embodiment 1, mine virtual anchor point wireless positioning.

[0112] Such as Figure 7 As shown, in the mine, one user terminal UE moves from position S1 to S2, assuming that there are four visible satellites in the sky.

[0113] According to the current satellite navigation and positioning algorithm, at least 4 satellite signals need to be received to complete the positioning. In this example:

[0114] When in UE position S1:

[0115] The UE can receive the signals of 4 satellites including GPS1, GPS2, GPS3, and GPS4, which meet the independent positioning conditions. After setting the position, the information is (α, x1, y1, z1), where α is the time difference between the clock of the signal receiving station and the satellite . x1, y1, z1 are three-dimensional coordinates respectively.

[0116] At the same time, the UE can receive the 2-path signal of the base station Bs1, that is, it can receive the direct-path P11 signal of the base station Bs1 and the P12 s...

Embodiment 2

[0128] Embodiment 2, indoor terminal assisted positioning.

[0129] Such as Figure 8 As shown, in the mine, there is one UE1 moving from position s1 to s2, assuming that there are four visible satellites in the sky.

[0130] According to the current satellite navigation and positioning algorithm, at least 4 satellite signals need to be received to complete the positioning. In this example:

[0131] When in position S1:

[0132] UE1 can receive signals from 4 satellites including GPS1, GPS2, GPS3, and GPS4, which meet the independent positioning conditions. The information after setting the position is (α, x1, y1, z1), where α is the time difference between the terminal clock and the satellite. x1, y1, z1 are three-dimensional coordinates respectively.

[0133] At the same time, UE1 can receive the 2-path signal of the base station bs1, that is, it can receive the direct path P11 signal of the base station Bs1 and the P12 signal reflected by the plane.

[0134] UE1 moves ...

Embodiment 3

[0142] Embodiment 3, positioning of dense urban areas.

[0143] Such as Figure 9 As shown, in the middle of the building, one user terminal moves from position S1 to S2, assuming that there are four visible satellites in the sky.

[0144] According to the current satellite navigation and positioning algorithm, at least 4 satellite signals need to be received to complete the positioning. In this example:

[0145] When in position S1:

[0146] The user terminal can receive the signals of 4 satellites including GPS1, GPS2, GPS3, and GPS4, which meet the independent positioning conditions. The information after setting the positioning is (α, x1, y1, z1), where α is the time difference between the terminal clock and the satellite. x1, y1, z1 are three-dimensional coordinates respectively.

[0147] At the same time, the user terminal can receive the 2-path signal of the base station Bs1, that is, it can receive the P12 signal reflected back by the base station Bs1 through the p...

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Abstract

Discloses are a virtual anchor point-based wireless locating method, device and terminal. The method comprises: when valid locating conditions are satisfied, acquiring and saving locating data, conducting multipath analysis and tracking on a received wireless signal transmitted by a signal transmission station simultaneously, calculating and saving propagation distance information about each path, and calculating and saving virtual image location information about each path of the signal transmission station according to the locating data and the propagation distance information about each path of the signal transmission station; and when there are not enough valid locating conditions, selecting at least one virtual image as a locating virtual anchor point from multipath virtual images of the signal transmission station, and obtaining current location information according to the valid locating conditions and the at least one locating virtual anchor point. In a rich-multipath scenario (such as the interior and dense urban areas), the present invention combines with other valid locating conditions to conduct locating through continuously recorded multipath virtual anchor points of an actual wireless signal transmission station, thereby fully taking advantage of multipath information and reducing a locating error caused by signal reflection and diffraction.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a virtual anchor point-based wireless positioning method, device and terminal. Background technique [0002] With the continuous development of the times, more and more attention has been paid to the positioning technology of mobile phones. It has its limitations. For this reason, in order to obtain higher positioning accuracy, it is a direction of future development to use multiple positioning systems to coordinate and combine positioning (also called multi-mode positioning). Multi-mode positioning can give full play to the advantages of various positioning methods , can not only provide better positioning accuracy and faster response speed, but also cover a wider range to achieve seamless and precise positioning. [0003] For example, the satellite positioning system is organically combined with the mobile communication system for mobile phone positionin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S19/42H04W4/02
CPCG01S19/22G01S19/40G01S5/0242G01S5/02526G01S19/428G01S19/46G01S5/0273H04W4/025G01S19/42H04L43/16
Inventor 陈诗军郁光辉胡留军鲁照华
Owner ZTE CORP
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