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Indoor positioning and navigation method based on wifi double-end signal intensity characteristic fingerprints

A signal strength and characteristic fingerprint technology, applied in the field of indoor navigation and positioning, can solve the problems of poor positioning effect of the fingerprint positioning system, high maintenance cost of the fingerprint positioning system, and difficulty in ensuring the timeliness of data update, so as to improve the positioning accuracy and eliminate the negative effect

Inactive Publication Date: 2019-07-12
TIANJIN UNIV OF SCI & TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to a huge post-maintenance cost of the fingerprint positioning system based on wifi signals. In addition, it is difficult to ensure the timeliness of data update in practical applications, which eventually leads to poor actual positioning effect of the fingerprint positioning system based on wifi signals.

Method used

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  • Indoor positioning and navigation method based on wifi double-end signal intensity characteristic fingerprints
  • Indoor positioning and navigation method based on wifi double-end signal intensity characteristic fingerprints
  • Indoor positioning and navigation method based on wifi double-end signal intensity characteristic fingerprints

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Embodiment 1

[0024] Such as Figure 1-3 As shown, the specific operation steps of a method for indoor positioning and navigation based on wifi dual-terminal signal strength feature fingerprints are as follows:

[0025] Step S1: Perform offline training processing on the wifi dual-end signal strength information;

[0026] Step S2: Use the wifi dual-terminal signal strength to perform online positioning.

[0027] Such as figure 1 As shown, step S1 includes the following steps:

[0028] Step S11: For a defined positioning area with n (n is not less than 1) wifi transmitting devices, that is, WAPs, select several sampling points in the positioning area. Within a period of time at each sampling point, m (m is not less than 20) samples are taken for the signal strengths transmitted by the n WAPs in real time and the signal strengths received by the user from the n WAPs, and the BSSID addresses of APs in different locations are obtained at the same time , m groups of signal transmission stren...

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Abstract

The invention discloses an indoor positioning and navigation method based on wifi double-end signal intensity characteristic fingerprints. The method comprises the steps that S1, offline training processing is performed on wifi double-end signal intensity information; and S2, wifi double-end signal intensity is used for reprocessing to obtain indoor positioning information. Therefore, the problemthat in the past, an acquired indoor positioning result is unstable due to a transmitting power change of a wifi signal transmitting end, and consequently positioning is not accurate is solved.

Description

technical field [0001] The invention relates to the technical field of indoor navigation and positioning, in particular to an indoor positioning and navigation method based on wifi double-terminal signal strength characteristic fingerprints. Background technique [0002] With the development of science and technology, services based on location information have become an indispensable part of daily activities. Statistics show that 10% of people's activities are distributed in outdoor open environments, and 90% are distributed in indoor environments. For the outdoor environment, the current mature satellite positioning system has made the positioning accuracy meet the daily needs. However, there has not been a mature positioning solution that has been widely recognized for indoor environments. In recent years, indoor location-based services have attracted more and more attention due to their huge social significance and commercial value. Its application fields will cover var...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02G01C21/20H04W4/33H04W4/024H04W64/00
CPCG01C21/206G01S5/0278H04W4/024H04W4/33H04W64/006
Inventor 王琦琦许素霞
Owner TIANJIN UNIV OF SCI & TECH