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Positioning system and method based on multi-frequency-point joint measurement of wireless local area network

A positioning system and wireless local area technology, applied in multi-antenna networks, broadband and multi-frequency fields, can solve problems such as complex propagation paths, complex interference environments, and influence user propagation channel measurement results, achieve controllable network burden, support large-scale , to achieve the effect of user clustering positioning

Active Publication Date: 2017-11-10
JIANGSU HENGXIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this is due to the fact that the signals transmitted by wireless LAN access points (hereinafter referred to as wireless access points) often need to be reflected and scattered by complex indoor and outdoor environments, and the propagation path is relatively complicated. On the other hand, it is also because the current wireless LAN interference environment is complex. Also affects the actual measurement results of the user propagation channel

Method used

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  • Positioning system and method based on multi-frequency-point joint measurement of wireless local area network
  • Positioning system and method based on multi-frequency-point joint measurement of wireless local area network
  • Positioning system and method based on multi-frequency-point joint measurement of wireless local area network

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Embodiment 1

[0025] Such as figure 1 and figure 2 As shown, this embodiment includes: a joint estimation unit, a user equipment, and three wireless access points 1, 2, and 3, wherein: the three wireless access points receive the signals transmitted by the user equipment at two frequency points by changing antenna angles. signal and process it, that is, observe the transmission channel of the user equipment, estimate the position of the user equipment relative to the wireless access point, and send the relative position information back to the joint estimation unit; the joint estimation unit combines the pre-stored information to estimate the user equipment The precise geographic location of the device, and timely update the user's geographic location.

[0026] The antenna can be a single receiving antenna or multiple receiving antennas.

[0027] The pre-stored information includes: antenna angle information and geographic location information of the wireless access point.

[0028] The ...

Embodiment 2

[0076] Such as Figure 5 As shown, this embodiment includes two wireless access points 1 and 2, and each wireless access point has three commonly used frequency points of 2.4GHz, 5GHz and 60GHz for access. For the convenience of description, it is assumed that the three frequency points have a direct path and a reflected path respectively.

[0077] The reference angle of arrival θ' and propagation time τ' may be as follows: the reference frequency point of wireless access point 1 is frequency point 1, and the reference frequency point of wireless access point 2 is frequency point 2. The joint estimation unit determines the direct path of wireless access point 1 frequency point 1 and wireless access point 2 frequency point 2 as a reference, and calculates wireless access point 1 frequency point 2, 3, wireless access point 2 frequency point 1 , The weight of the direct path of 3.

[0078] In this embodiment, multiple wireless access points estimate the angle of arrival and pro...

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Abstract

The invention relates to a positioning system and method based on multi-frequency-point joint measurement of a wireless local area network. The system is composed of a joint estimation unit, user equipment and a plurality of wireless access points. All wireless access points receive signals emitted by the user equipment at a plurality of frequency points by changing an antenna angle and process the received signals, estimate arrival angles and propagation time of the signals based on time-offset compensation and signal reconstruction, estimate locations of the user equipment relative to the wireless access points, and returns relative location information to the joint estimation unit; and the joint estimation unit estimates the precise geographic position of the user equipment by combining pre-stored information and updates the geographic position of the user timely. Therefore, on the premise that no extra wireless access point deployment cost increases, joint measurement at multiple frequency points by multiple wireless access points is carried out to solve a problem that precise positioning can not be realized by the traditional positioning method is solved; and the good foundation is laid for other applications based on user locations in a wireless local area network.

Description

technical field [0001] The present invention relates to a technology in the field of wireless local area network positioning, specifically a positioning system and method based on wireless local area network multi-frequency point joint measurement, which can be used in cellular networks, Internet of Things, Internet of Vehicles, smart grids and smart Home network and other broadband multi-frequency, multi-antenna network occasions where there are many indoor and outdoor user positioning requirements. Background technique [0002] With the vigorous development of the mobile Internet, the application of wireless local area network (Wireless Fidelity, WiFi) has become more and more extensive, from the original computer connection to the Internet to provide interconnection of a series of computer devices including mobile phones, tablet computers, smart home appliances, etc. and Internet data access function, the number of access points (Access Point, AP) also showed explosive gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W84/12G01S5/02G01S5/08G01S5/10
CPCG01S5/0268G01S5/08G01S5/10H04W64/00H04W84/12
Inventor 张舜卿徐树公
Owner JIANGSU HENGXIN TECH CO LTD
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