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WIFI positioning method and system thereof, having non-planar MIMO antenna

A positioning method and positioning system technology, applied in radio transmission systems, radio wave measurement systems, positioning, etc., can solve problems such as limiting the space that clients can locate, not including clients, complex system deployment, etc., to reduce complexity and computing load, improve coverage, and facilitate deployment

Inactive Publication Date: 2018-06-01
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current Wi-Fi access point of the planar MIMO antenna element cannot achieve unconstrained positioning
[0004] In the prior art, there is a way to solve the above problems by adding constraints, but it limits the effective space of Wifi time-of-flight positioning. Assuming that the position of the client is above the MIMO antenna plane, the system cannot include the client appearing on the MIMO antenna plane the space below
This constraint limits the positioning space of the client, reduces the coverage of Wi-Fi positioning by 50%, and increases the complexity of positioning software
[0005] Since the constraints are related to the deployment of MIMO antennas and the spatial location where the client can be located, the complexity of the system deployment increased by the constraints, therefore, it is urgent to provide a Wi-Fi positioning method and its system with non-planar MIMO antennas to overcome the above defects.

Method used

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  • WIFI positioning method and system thereof, having non-planar MIMO antenna
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  • WIFI positioning method and system thereof, having non-planar MIMO antenna

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Embodiment 1

[0043] Please refer to figure 1 , the wifi positioning method with non-planar MIMO antenna of the present invention, comprises the following steps:

[0044] S01, each client acquires a wifi signal of an antenna element of an access point. Specifically, each client receives a wifi signal of each of the antenna elements of the access point, wherein the number of the antenna elements is not less than 4. It should be noted that the antenna elements are arranged on different planes.

[0045] S02. Calculate the flight time from each antenna element to the client according to the carrier phase of each wifi channel. Specifically, the client acquires channel state information and uses WiFi frequency hopping technology to measure the time-of-flight from each of the antenna elements to the client, specifically, the time-of-flight of each of the wifi channels and each of the The relationship between the carrier phase of the wifi channel is: Among them, ∠h i Carrier phase measured in...

Embodiment 2

[0079] Please refer to image 3 and Figure 4 , the wifi positioning system with a non-planar MIMO antenna of the present invention includes: a wifi access terminal 1, and a client 2 connected to the wifi access terminal, wherein the wifi access terminal 1 is provided with not less than 4 antenna elements 3, the antenna elements 3 are respectively installed on different planes, the wifi access terminal 1 is provided with a first acquisition device connected to the client 2 for obtaining wifi channel state information Module 11, each client 2 is provided with a second acquisition module 21 connected to the antenna element of the wifi access terminal 1 for obtaining wifi channel state information, and the client 2 is also provided with a second acquisition module 21 for A positioning module 22 that calculates the wifi flight time from the antenna element 3 to the client 2, and calculates the position of the client 2 in combination with the Chinese residual equations. Specifica...

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Abstract

The present invention relates to the technical field of wifi positioning, and particularly, to a wifi positioning method having a non-planar MIMO antenna. The method comprises the following steps: each client obtains a wifi signal of an antenna element of an access point; compute a flight time from each antenna element to the client by means of a carrier phase of each wifi channel; calculate a position from each antenna element to each client by means of the flight time and a Chinese remainder equation set; and compute three-dimensional coordinates of each client by means of three-dimensionalcoordinates of the antenna element. A constraint condition does not need to be manually added, and accordingly the present invention has the characteristics of convenient deployment and accurate positioning. In addition, the method improves the coverage range of wifi positioning, and reduces the complexity and the computation amount of the positioning. The present invention also provides a wifi positioning system having a non-planar MIMO antenna.

Description

technical field [0001] The invention relates to the technical field of wifi positioning, in particular to a wifi positioning method with a non-planar MIMO antenna and a system thereof. Background technique [0002] Wifi can be used not only for communication, but also for positioning. Wifi positioning technology can be divided into triangle positioning method based on RSSI strength, fingerprint positioning method based on RSSI strength, and positioning method based on MIMO direction of arrival. These methods all require the client to connect to multiple Wifi access points and extract information such as the signal strength of each access point, but the systems of these positioning methods are relatively complicated and the efficiency is also low. The newly developed single access point Wifi positioning method uses channel state information (channel state information CSI) and frequency hopping (channel hopping) technology to measure flight time, because the working channel o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02H04W64/00H04B7/0413
CPCG01S5/02H04B7/0413H04W64/006H04W4/02
Inventor 王峰禹汶杰钟柱梁邱文添梅琪张智金汪进杨春媚王家燃利传迈薛更平
Owner GUANGDONG UNIV OF TECH
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