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A wifi indoor positioning method based on multiple filtering

A multi-filtering and indoor positioning technology, which is applied in location information-based services, specific environment-based services, radio wave measurement systems, etc., can solve the problem of inaccurate indoor positioning methods, reduce the average positioning error and improve positioning accuracy , the effect of improving accuracy

Active Publication Date: 2020-08-04
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a WiFi indoor positioning method based on multiple filtering, which is used to solve the problem that the existing indoor positioning method is not accurate enough

Method used

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  • A wifi indoor positioning method based on multiple filtering
  • A wifi indoor positioning method based on multiple filtering
  • A wifi indoor positioning method based on multiple filtering

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Embodiment Construction

[0057] The idea, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to The protection scope of the present invention.

[0058] Such as figure 1 As shown in the plan view of the experimental area of ​​this embodiment, the experimental area is an indoor room with a length of about 10 meters and a width of about 6 meters. Frequent; AP access point 1~AP access point 6, a total of six WiFi relay amplifiers are used as WiFi access points, and WiFi access point 1~WiFi access point 6 press figure 1 The mark position is s...

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Abstract

The invention discloses a WiFi indoor positioning method based on multiple-filter. The method comprises an offline measurement stage and an online measurement stage; the offline measurement stage comprises the following steps: collecting fingerprint data, and performing dynamic threshold filter and dual smoothing filter of the fingerprint data, and performing interpolation on a fingerprint database; the online measurement stage comprises the step of positioning a positioning terminal. Through the indoor positioning method provided by the invention, the fingerprint data accuracy of the offlinemeasurement stage is improved, and the positioning precision of the online measurement stage is improved; under the same condition, the average positioning error is reduced by 30% and 33% in comparison with the traditional WiFi indoor positioning method based on WKNN and the traditional WiFi indoor positioning method based on KNN.

Description

technical field [0001] The invention relates to the technical field of indoor positioning and navigation, in particular to a multiple filtering-based WiFi indoor positioning method. Background technique [0002] With the popularization of smart phones, the use of smart phones for WiFi positioning has gradually become a research hotspot in indoor positioning. Generally, there will be WiFi hotspots in public places such as hospitals, office buildings, shopping malls, and smart terminals basically have WiFi interfaces, so the indoor positioning system based on WiFi can be constructed using existing equipment, thus greatly saving hardware costs . [0003] At present, the indoor positioning method based on WiFi is mainly based on the KNN (K nearest neighbor) WiFi indoor positioning method. The main principle of the KNN-based WiFi indoor positioning method is to estimate the Euclidean distance between the node to be positioned and the known node in the data fingerprint database ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W4/021H04W4/33H04W64/00G01S11/06
CPCG01S11/06H04W4/021H04W4/023H04W4/33H04W64/00
Inventor 陈辉李广宁施文鹏邢梁梁徐姝瑶
Owner GUILIN UNIV OF ELECTRONIC TECH