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Iterative algorithm for improving positioning precision of indoor visible light positioning system

A positioning system and positioning accuracy technology, applied in the field of visible light communication, can solve problems such as interference of reflected light signals of visible light positioning technology

Active Publication Date: 2016-08-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the current indoor visible light positioning technology is interfered by reflected light signals

Method used

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  • Iterative algorithm for improving positioning precision of indoor visible light positioning system
  • Iterative algorithm for improving positioning precision of indoor visible light positioning system
  • Iterative algorithm for improving positioning precision of indoor visible light positioning system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Concrete combination figure 1 , figure 2 and image 3 An iterative algorithm for improving the positioning accuracy of an indoor visible light positioning system according to the present invention is described in detail. figure 1 It is an iterative algorithm for improving the positioning accuracy of the indoor visible light positioning system of the present invention and the algorithm flow chart in the embodiment; figure 2 It is an iterative algorithm for improving the positioning accuracy of the indoor visible light positioning system of the present invention and a schematic diagram of the grid nodes in step S1 in Embodiment 1; image 3 It is a schematic diagram of the grid nodes in the reflection signal strength estimation algorithm in step S5 in Embodiment 1 of an iterative algorithm for improving the positioning accuracy of the indoor visible light positioning system of the present invention.

[0037] In this embodiment, it is assumed that positioning is perfor...

Embodiment 2

[0053] Changing the 4 LED lamps in Embodiment 1 into N (N>4) lamps, the positioning system is still valid.

Embodiment 3

[0055] If the LED light in Embodiment 1 is changed to other solid light sources such as OLED, the positioning system is still effective. In order to better understand the present invention, relevant content is supplemented as follows:

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Abstract

An iterative algorithm for improving the positioning precision of an indoor visible light positioning system comprises coarse positioning based on the intensity of received optical signals and iterative positioning based on combining of the intensity of the received signals and estimated reflected signal intensity. The iterative algorithm comprises the steps that firstly, coarse positioning is carried out according to the intensity of the received light signals; then the reflected signal intensity at the coarsely positioned position is estimated according to the coarse positioning result and the pre-calculated reflected signal intensity on a receiving plane grid node; the intensity of the received signals and the estimated reflected signal intensity are combined, and the final precise positioning result can be obtained by carrying out multiple times of iteration on the positioning result and a positioning equation. Due to the fact that diffuse reflection light signals from a wall and the surfaces of other objects can be estimated through the algorithm, and the influence of the reflected signals is inhibited, and accurate indoor visible light positioning can be achieved when the iterative algorithm is applied to actual scenes.

Description

technical field [0001] The invention relates to an indoor visible light positioning technology with integrated lighting, in particular to an iterative algorithm for improving the positioning accuracy of an indoor visible light positioning system, which belongs to the technical field of visible light communication. Background technique [0002] With the wide application of positioning and navigation technology and the continuous development of location-based services, indoor positioning technology has gradually entered people's field of vision, and the related demand is also growing. In the positioning and navigation market, positioning systems based on satellite signals such as GPS and Beidou occupy the vast majority. But at the same time, since the satellite signal will be blocked by tall buildings in the city; and indoors, the satellite signal will be seriously attenuated after passing through the wall, so satellite signal-based positioning technologies such as GPS and Bei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/16H04B10/116
CPCG01S5/16H04B10/116
Inventor 杨爱英黄河清冯立辉倪国强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY