Fingerprint database construction method of WiFi indoor positioning system

An indoor positioning and construction method technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of insufficient fingerprint information, unfavorable update and maintenance, and cumbersome processing, and achieve accurate and fast indoor positioning. Build fast, accurate fingerprint data effects

Inactive Publication Date: 2014-02-12
SHANGHAI JIAO TONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

The construction process of the traditional fingerprint library is time-consuming and cumbersome, the fingerprint information is insufficient, and it is not conducive to update and maintenance

Method used

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  • Fingerprint database construction method of WiFi indoor positioning system
  • Fingerprint database construction method of WiFi indoor positioning system

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Embodiment Construction

[0030] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0031] Such as figure 1 As shown, the fingerprint database construction method of the WiFi indoor positioning system provided by the present invention comprises the following steps:

[0032] Step 1: Determine the position and coordinates of the reference point.

[0033] The reference points are a series of pre-selected positions on the plane, and the fingerprint database is constructed by collecting fingerprint information at these positions. Establish a three-dimensional coordinate system, and the position of any reference point can be expressed by coordinates (x, y, z). Among them...

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Abstract

The invention discloses a fingerprint database construction method of a WiFi indoor positioning system. The method comprises the following steps: determining the position and the coordinates of a reference point, capturing the media access control address of access points at the reference point, collecting signal strength of all the access points in a media access control address list, and sending a sampling file to a server; conducting statistical treatment on signal strength data in the sampling file to obtain a fitting probability distribution curve, conducting correlation correction on the fitting probability distribution curve, conducting truncation processing on the probability distribution curve obtained after the correlation correction, calculating the probability of each decibel milliwatt value, conducting normalization processing, and finally generating a fingerprint database. The method solves the problems that the establishment process of a traditional fingerprint database is longer in consumed time, the processing is tedious, the fingerprint information is insufficient, and updating and maintenance are not facilitated. Due to the parallelization of fingerprint collection, the establishment of the fingerprint database is accelerated, optimized processing is carried out on the collected fingerprint data, and the fingerprint database is more accurate and comprehensive.

Description

technical field [0001] The invention relates to an indoor positioning system, and more specifically, relates to a method for constructing a fingerprint database for a WiFi-based indoor position fingerprint positioning system. Background technique [0002] At present, the demand for positioning technology is increasing. The most popular positioning technology is the Global Positioning System (GPS). This technology can obtain better accuracy in outdoor areas, but due to the way this technology is implemented, its positioning ability is greatly reduced in indoor environments. Therefore, it is urgent to find a feasible indoor positioning method to make up for the deficiency of the global positioning system. [0003] A feasible indoor positioning solution is realized by wireless local area network based on IEEE802.11. The traditional WiFi positioning method is realized by the triangulation positioning method, including methods based on time of arrival, time difference of arriva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G06F17/30H04W24/00
Inventor 刘乾辰祝正元徐昌庆
Owner SHANGHAI JIAO TONG UNIV
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