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Multi-fusion indoor positioning method and system based on wifi fingerprint

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: 2021-07-20
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 fingerprint
  • Multi-fusion indoor positioning method and system based on wifi fingerprint
  • Multi-fusion indoor positioning method and system based on wifi fingerprint

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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 features of the WiFi signal at a point (preferably the signal strength RSSI, but may also include other features 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; use classificati...

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Abstract

The invention discloses a WiFi fingerprint-based multi-fusion indoor positioning method and a system thereof. Wherein, the positioning method includes the following steps: obtaining WiFi fingerprints, constructing a WiFi fingerprint library; using a clustering algorithm to cluster and analyze the collected WiFi fingerprint data; using a classification algorithm to perform secondary classification on the clustered data, and The sub-region where it is located is discriminated; the regression equation of each sub-region is obtained according to the data after the secondary classification, and the coordinates of the point to be located are obtained by using the regression equation of the sub-region. The positioning method and its system not only avoid the limitation that the positioning accuracy is easily affected by physical environment factors, but also overcome the defect of slow speed of the traditional positioning method.

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-ba...

Claims

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Application Information

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Patent Type & Authority Patents(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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