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Multi-fusion indoor positioning method and system based on WiFi fingerprints

An indoor positioning and multi-fusion technology, applied in the field of wireless positioning, can solve the problems of multi-time and cost, and achieve the effect of overcoming slow speed and avoiding the influence of physical environment factors

Active Publication Date: 2019-07-23
SHANGHAI RES CENT FOR WIRELESS COMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technology can reduce the interference of physical environment factors on wireless transmission signals, it is necessary to calculate the Euclidean distance between the sample to be tested and the entire WiFi fingerprint library when performing fingerprint matching
When the capacity of the WiFi fingerprint library is large, it takes more time

Method used

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  • Multi-fusion indoor positioning method and system based on WiFi fingerprints
  • Multi-fusion indoor positioning method and system based on WiFi fingerprints
  • Multi-fusion indoor positioning method and system based on WiFi fingerprints

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Embodiment Construction

[0034] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] like figure 1 As shown, the multi-fusion indoor positioning method provided by the embodiment of the present invention mainly includes the following steps: dividing the area to be positioned into multiple sub-areas, sampling multiple WiFi signals and corresponding coordinate points in each sub-area; collecting each coordinate One or more characteristics of the WiFi signal at a point (preferably the signal strength RSSI, but may also include other characteristics such as the multipath structure of the WiFi signal at a certain location, whether an access point or base station can be detected at a certain location , the round-trip time or delay of WiFi signals at a certain location, etc.), obtain WiFi fingerprints to establish a WiFi fingerprint library; use clustering algorithms to cluster the collected data; us...

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Abstract

The invention discloses a multi-fusion indoor positioning method and system based on WiFi fingerprints. The positioning method comprises the following steps: obtaining a WiFi fingerprint, and constructing a WiFi fingerprint library; carrying out clustering analysis on the collected WiFi fingerprint data by adopting a clustering algorithm; carrying out secondary classification on the clustered databy utilizing a classification algorithm, and judging the sub-regions where the clustered data are located; and obtaining a regression equation of each sub-region according to the data subjected to the secondary classification, and solving coordinates of the point to be positioned by utilizing the regression equation of the sub-region. According to the positioning method and system, the limitationthat the positioning precision is easily influenced by physical environment factors is avoided, and the defect that a traditional positioning method is low in speed is overcome.

Description

technical field [0001] The invention relates to a multi-fusion indoor positioning method based on WiFi fingerprints, and also relates to a corresponding multi-fusion indoor positioning system, belonging to the technical field of wireless positioning. Background technique [0002] Localization in indoor environments is still a technical field with many unsolved problems. Due to severe signal attenuation and multipath effects, common outdoor positioning technologies (such as GPS, Beidou, etc.) cannot work effectively inside buildings. Currently, WiFi exists in most indoor environments. The WiFi signal has the characteristics of high coverage, large traffic, and long transmission distance, which makes the WiFi-based indoor positioning technology develop rapidly. [0003] WiFi-based indoor positioning technology can be divided into two categories, namely: ranging-based indoor positioning technology and fingerprint-based indoor positioning technology. Among them, the ranging-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04B17/318G01S5/02
CPCG01S5/0263H04W64/006H04B17/318
Inventor 黄蕾张武雄许晖赵玉峰郜伟伟
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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