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Method of improving WiFi fingerprint positioning precision and efficiency

A fingerprint positioning and fingerprint technology, applied in positioning, location-based services, measuring devices, etc., can solve the problems of low positioning efficiency and low positioning accuracy, and achieve the effect of reducing volatility and improving positioning efficiency.

Inactive Publication Date: 2016-11-09
DONGHUA UNIV
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Problems solved by technology

[0008] However, the traditional WiFi fingerprint positioning algorithm has low positioning accuracy and low positioning efficiency.

Method used

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  • Method of improving WiFi fingerprint positioning precision and efficiency
  • Method of improving WiFi fingerprint positioning precision and efficiency
  • Method of improving WiFi fingerprint positioning precision and efficiency

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Embodiment Construction

[0031] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0032] The embodiment of the present invention relates to a method for improving the accuracy and efficiency of WiFi fingerprint positioning. In the offline training phase, a fingerprint database for online positioning is constructed, and the K-means clustering algorithm is used to classify the fingerprint database. The signal strength values ​​of the sampling points in the database are processed by data smoothing; in the onlin...

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Abstract

The invention relates to a method of improving WiFi fingerprint positioning precision and efficiency. The method comprises steps of in an offline training stage, establishing a fingerprint database used for online positioning, and classifying K-means cluster algorithms adopted in the fingerprint database, wherein signal intensity values of sampling points in the fingerprint database are subjected to data smoothing; and in an online positioning stage, adopting a K nearest neighbor method to find K fingerprints nearest to an actually-measured fingerprint distance, wherein the position of a sampling point corresponding to the mean value of the K fingerprints is the position of a to-be-detected point. The method can improve the positioning precision and efficiency.

Description

technical field [0001] The invention relates to the field of WiFi-based indoor positioning technology, in particular to a method for improving the accuracy and efficiency of WiFi fingerprint positioning. Background technique [0002] Indoor positioning system is one of the current hot spots in the field of information technology. With the rapid development of the Internet of Things and wireless communication technology, location-based services have shown broad application prospects in the fields of medical care, public safety, and industrial production. [0003] The Global Positioning System (Global Positioning System, GPS) is a widely used positioning technology at the present stage, and it is widely used in various location services. However, the GPS positioning system cannot locate indoors, because this positioning method requires more than three satellites to provide positioning information. Generally, it is only suitable for open and unsheltered outdoor environments. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02H04W4/04
CPCG01S5/0252H04W4/04
Inventor 张慧官洪运
Owner DONGHUA UNIV
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