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Reverse synchronous perception-based wifi (Wireless Fidelity) wireless positioning method and system

A wireless positioning and sensor technology, which is applied in the directions of location information-based services, wireless communication, wireless communication services, etc., can solve the problems of positioning error, large positioning error, uncertainty of network time delay, etc.

Inactive Publication Date: 2015-05-20
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the same wifi signal source will send out wifi signals with fluctuating strength within a period of time, as well as the uncertainty of network time delay, such as figure 1 The traditional positioning methods shown all have problems such as large positioning errors and even positioning errors.

Method used

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  • Reverse synchronous perception-based wifi (Wireless Fidelity) wireless positioning method and system
  • Reverse synchronous perception-based wifi (Wireless Fidelity) wireless positioning method and system
  • Reverse synchronous perception-based wifi (Wireless Fidelity) wireless positioning method and system

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Embodiment Construction

[0032] For the convenience of description and without loss of generality, in this specific embodiment, the positioning range is reduced to a rectangular positioning area. For a larger range of positioning methods including multiple rectangular positioning areas, analogy can be made on the basis of this specific embodiment. have to.

[0033] A wifi wireless positioning method based on reverse synchronous perception, which includes two steps of training and positioning, the training step only needs to be performed once, and after the training step is completed, the positioning step can be performed any number of times as required.

[0034] Such as figure 2 , image 3 As shown, the training step includes the following steps:

[0035] (1) The collection of training data, which also includes the following sub-steps, such as figure 2 , image 3 Shown:

[0036] (1.1) Establish a positioning grid: divide the rectangular positioning area into a square grid with one grid per squa...

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PUM

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Abstract

The invention relates to the technical field of wifi (Wireless Fidelity) wireless positioning, in particular to a reverse synchronous perception-based wifi wireless positioning method and a reverse synchronous perception-based wifi wireless positioning system, which realize precise positioning. The positioning method comprises two steps, i.e. a training step and a positioning step, wherein the training step is only required to be implemented for one time; after the training step is finished, the positioning step can be implemented for any times. The positioning system comprises a synchronous controller, at least three wifi signal perception devices and a positioned mobile terminal. The method is different from the traditional method for positioning the mobile terminal by sensing a fixed wifi signal source of each position, by the positioned mobile terminal in that the positioned mobile terminal serves as the wifi signal source, and the mobile terminal is positioned through synchronous perception on the signal source of the positioned mobile terminal by a plurality of wifi signal perception devices with fixed positions.

Description

technical field [0001] The invention relates to the field of wifi wireless positioning technology, in particular to a wifi wireless positioning method and system based on reverse synchronous perception. Background technique [0002] Common wireless positioning technologies include Wi-Fi, Bluetooth, Zigbee, RFID, UWB and other positioning solutions, but most of the mobile terminals of ordinary users such as Zigbee, RFID, UWB and other technologies cannot support them, and the popularity of Wi-Fi networks, as well as its comparative High coverage and low cost have become the mainstream technology for indoor positioning. [0003] Traditional wifi indoor positioning usually requires at least three fixed wifi signal sources. Through the perception of each wifi signal source by the positioned mobile terminal, time of arrival (TOA), time difference of arrival (time difference of arrival, TDOA) ), signal strength or signal fingerprint method to locate the mobile terminal. figure 1...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W4/04H04W64/00
CPCH04W4/02H04W4/04H04W64/00
Inventor 朱嘉钢邱爱坤张涛苏海波
Owner JIANGNAN UNIV
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