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Wi-Fi single access point ranging and positioning method, system and electronic equipment based on CSI

A positioning method and access point technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problem of high cost

Inactive Publication Date: 2020-10-23
MINZU UNIVERSITY OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, the ranging algorithm based on the Chinese remainder theorem needs to round the measured data before it can be used, which further introduces errors, and corresponding measures need to be taken to reduce the errors; fingerprint positioning technology is realized by establishing a fingerprint library of the relationship between CSI and position Positioning, including two stages of offline training and online matching, requires a large number of on-site surveys in advance, and the fingerprint database needs to be updated after the environment changes, which is costly

Method used

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  • Wi-Fi single access point ranging and positioning method, system and electronic equipment based on CSI
  • Wi-Fi single access point ranging and positioning method, system and electronic equipment based on CSI
  • Wi-Fi single access point ranging and positioning method, system and electronic equipment based on CSI

Examples

Experimental program
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Effect test

Embodiment 1

[0036] figure 1 A schematic flowchart of a CSI-based ranging and positioning method for a single WiFi access point provided according to Embodiment 1 of the present invention is shown. The method is applied to a Wi-Fi network including a sending end and a receiving end, wherein the sending end includes a single access point; as figure 1 As shown, the method includes:

[0037] S101. The sending end receives the positioning application sent by the receiving end, and agrees with the receiving end on a frequency hopping control protocol and a frequency hopping time between the parties; wherein the sending end and the receiving end have at least three antennas respectively.

[0038] Two sets of customized software radio equipment are used to simulate the transmitter (AP) and receiver (mobile terminal) respectively. Each software radio equipment is equipped with 4 antennas. Let the AP be the transmitter, the mobile terminal be the receiver, and the 4 The antennas are numbered TX1,...

Embodiment 2

[0043] image 3 A schematic flowchart of a CSI-based ranging and positioning method for a single WiFi access point provided according to Embodiment 2 of the present invention is shown. This method is applied to a Wi-Fi network including a sending end and a receiving end, such as image 3 As shown, the method includes the following steps:

[0044] S301. The sending end receives the positioning application sent by the receiving end, and agrees with the receiving end on a frequency hopping control agreement and a frequency hopping time between the two parties; wherein the sending end and the receiving end have at least three antennas respectively. Wherein, the agreed frequency hopping control protocol is: control the frequency hopping of 13 channels in the 2.4GHz frequency band between the sending end and the receiving end.

[0045] Two sets of customized software radio equipment are used to simulate the transmitter (AP) and receiver (mobile terminal) respectively. Each softwar...

Embodiment 3

[0149] Based on Embodiment 1 and Embodiment 2, in order to illustrate the technical solution of the present application more clearly, the present application also provides the following experiments.

[0150] The experimental equipment includes custom-made software radio equipment and a notebook computer, which are placed on a mobile trolley for the convenience of measurement. The sending equipment and receiving equipment are connected through a clock distributor and connected to the notebook computer through a router. The laptop is installed with MATALB software for real-time collection of CSI data, CSI data processing, running ranging and positioning algorithms. The main functional parameters of the software defined radio equipment are as follows: 1) Support 4x4 antenna to send and receive. 2) Support 2.4GHz standard WiFi channel. 3) Adopt IEEE802.11n working mode: 20MHz bandwidth, 64 subcarriers, MCS24~MCS31, HT-MIXED mode, sampling rate 40MHz. 4) Complete channel switchin...

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PUM

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Abstract

The invention discloses a CSI-based Wi-Fi single access point distance measurement positioning method and system, an electronic device and a computer storage medium. The CSI-based Wi-Fi single accesspoint distance measurement positioning method is characterized by applying to a Wi-Fi network comprising a transmitting end and a receiving end, wherein the transmitting end comprises a single accesspoint; and the method comprises the following steps: the transmitting end receives a positioning application sent by the receiving end, and appoints a frequency hopping control protocol and a frequency hopping time of the both parties with the receiving end; and according to the frequency hopping control protocol and the frequency hopping time, any one of the transmitting end and the receiving endsends a pilot signal, and the other end receives CSI data and obtains a positioning result accordingly, wherein the transmitting end and the receiving end respectively have at least three antennas. According to the CSI-based Wi-Fi single access point distance measurement positioning method and system disclosed by the invention, the location of the receiving end can be determined without rotatingthe receiving end, so that the operation is convenient, and the positioning accuracy is high.

Description

technical field [0001] The present invention relates to the technical field of distance measurement and positioning, in particular to a CSI-based Wi-Fi single access point distance measurement and positioning method, system, electronic equipment and computer storage medium. Background technique [0002] In daily life and work, people spend most of their time indoors, and there is an urgent need for indoor location-based services. There are many mature indoor positioning solutions, such as infrared, Bluetooth, Zigbee, ultrasonic positioning, etc. The common feature of these positioning technologies is that they need to deploy special equipment such as signal sources or tags, which are not suitable for large-scale promotion. In recent years, the development of wireless communication technology and the large-scale coverage of wireless local area network (Wireless Local Area Network, WLAN) have provided a new way for the research of indoor positioning technology. The indoor posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04L5/00H04W4/80
CPCH04L5/0048H04W64/003H04W4/80
Inventor 朱丽平甄杰邓慧茹文汉江赵小兵
Owner MINZU UNIVERSITY OF CHINA