Indoor positioning method and positioning device based on fingerprints

An indoor positioning and positioning device technology, applied in wireless communication services, electrical components, wireless communication, etc., can solve problems such as low accuracy and stability, large models, and difficulty in ensuring positioning accuracy and stability, and achieve guaranteed Positioning stability, improving positioning accuracy, and improving user experience

Active Publication Date: 2015-10-07
TSINGHUA UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] However, in the existing technology, due to the rich multipath effect of the indoor environment and the irregular movement of people, it is difficult to guarantee the accuracy and stability of positioning.
Specifically, th

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  • Indoor positioning method and positioning device based on fingerprints
  • Indoor positioning method and positioning device based on fingerprints
  • Indoor positioning method and positioning device based on fingerprints

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0035] In the present invention, unless otherwise clearly specified...

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Abstract

The invention discloses an indoor positioning method and positioning device based on fingerprints. The method comprises the steps of: extracting fingerprint information; performing coupling through a characteristic set similarity coupling algorithm to obtain coupling parameters; determining whether to perform AP selection and/or AP weight adjusting in dependence on the coupling parameters and a coupling parameter threshold; performing AP selection and/or AP weight adjusting if the coupling parameters are less than a coupling parameter threshold, so as to update an off-line database according to the result of the AP selection and/or AP weight adjusting to complete indoor positioning; and directly performing indoor positioning if the coupling parameters are higher than a coupling parameter threshold. The method can reduce influence of environment on positioning, improve positioning precision, and guarantee positioning stability.

Description

technical field [0001] The invention relates to the technical field of positioning, in particular to a fingerprint-based indoor positioning method and positioning device. Background technique [0002] Fingerprint-based indoor positioning technology utilizes received signal strength or other channel state information from different access points (APs) or base stations for positioning. [0003] The indoor positioning technology based on the fingerprint database includes two steps: an offline stage and an online stage, and the fingerprint database is established in the offline stage. For two-dimensional positioning, if there are n base station access points AP, the fingerprint of each reference point is a vector [Xpos, Ypos, Rss_AP1, Rss_AP2, ..., Rss_APn]. [0004] Among them, when it is in the online stage, the KNN indoor positioning technology will calculate the distance between the observed RSS vector [Rss_AP1, Rss_AP2, ..., Rss_APn] and the RSS vector of each reference po...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W4/04
CPCH04W64/003
Inventor 陈国峰肖立民周世东李佳徽周来
Owner TSINGHUA UNIV
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