Indoor positioning method

A technology for indoor positioning and points to be located, applied in the field of pattern recognition

Inactive Publication Date: 2013-01-16
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to propose an indoor positioning method in order to so

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Embodiment Construction

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0017] The present invention first establishes the RSS fingerprint database, and then on the basis of the K nearest neighbor algorithm, constructs a neighbor point database of the reference point, so that a kind of neighbor point and the neighbor point of the point to be positioned and the reference point and the point to be positioned can be established during the positioning operation The network relationship between other reference points fully exploits the useful information in the RSS fingerprint database.

[0018] The basic idea of ​​the K-nearest neighbor algorithm is: after a given instance, select K samples (reference points) that are the closest (most similar) to the new instance in the training sample set according to the similarity with the instance, and then use K Samples make decisions about the value of a...

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Abstract

The invention discloses an indoor positioning method which comprises the following steps of: establishing an RSS (received signal strength) fingerprint databank of reference points; calculating K neighbor points of each reference point and establishing a neighbor point databank; calculating K neighbor points of a point to be positioned, and subsequently finding n neighbor points which are repeated for the most times from neighbor points of the K neighbor points; weighing and summing coordinates of the K neighbor points of the points to be positioned and n neighbor points of the neighbor points so as to obtain an estimation coordinate of the points to be positioned. According to the method, the neighbor point databank of all reference points is established, so that the single relation between points to be positioned and reference points is expanded to a network relation between the points to be positioned and the reference points and between the neighbor points of the points to be positioned and other reference points, useful information in the RSS fingerprint databank is sufficiently excavated and utilized, and the influences of a non-line-of-sight transmission effect, a multi-way transmission effect and an RSS attenuation regulation abnormality are effectively avoided.

Description

technical field [0001] The invention is an indoor positioning method in the field of pattern recognition, and in particular relates to an indoor positioning method based on a K-nearest neighbor database. Background technique [0002] Indoor positioning technology has broad application prospects in business and public safety, and is one of the hot research technologies today. In commercial applications, the indoor positioning system can be used to track and locate people with special needs, children who are far away from sight supervision, navigate for the blind, locate equipment needed in hospitals, and dispatch in large warehouses; in public safety On the one hand, indoor positioning systems can be used to track prison inmates, navigate police, firefighters, etc. to complete their tasks indoors. [0003] The commonly used indoor positioning methods at this stage are generally divided into infrastructure-based and infrastructure-free. Infrastructure-based approaches includ...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 徐展唐道平刘丹张国伟曾庆瑾薛世帅
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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