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Three-dimensional indoor localization method utilizing visible light communication

A visible light communication and indoor positioning technology, applied in the field of three-dimensional indoor positioning using visible light communication, can solve problems such as large amount of system calculation, and achieve the effects of avoiding exhaustive traversal, high positioning accuracy, and flexible value selection.

Active Publication Date: 2017-02-22
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

Most of the traditional trilateral positioning methods require the absolute position coordinate information of multiple receivers. Assuming that the height of the target terminal is known, only the remaining two-dimensional coordinates are used for positioning, and an exhaustive or iterative algorithm is required, and the calculation amount of the system is relatively large. Big

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  • Three-dimensional indoor localization method utilizing visible light communication
  • Three-dimensional indoor localization method utilizing visible light communication
  • Three-dimensional indoor localization method utilizing visible light communication

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] figure 1 A system block diagram of the visible light positioning scheme is shown. First, the LED sends a modulated optical signal; then the optical signal is received by the PD at the receiving end through the channel; finally, the terminal obtains the estimated three-dimensional coordinates of the target terminal through calculation using the algorithm of the present invention. The visible indoor visible light positioning system does not require additional hardware equipment, and is easy to implement and low in cost.

[0046] figure 2The general layout of the localization method of the present invention is shown. Place several LEDs on the ceiling as optical signal transmitters, and configure several PDs on the target terminal as optical signal receivers. The specific implementation process is as follows:

[0047] Step 1: Set M LEDs on the indoor ceiling t...

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Abstract

The invention discloses a three-dimensional indoor localization method utilizing visible light communication. Any number of light emitting diodes (LEDs) are placed indoors, and any number of photodiodes (PDs) are arranged on target terminal equipment as light receiving devices. Supposing that the coordinate locations and transmitting power of the LEDs are known, the PDs and a target terminal are on the same level and the relative locations of the PDs and the target terminal are known, and by measuring the receiving power of each receiving device PD, the three-dimensional coordinate location of the target terminal can be determined through computation by utilizing the geometrical relationship. The method achieves indoor three-dimensional space localization, is small in computing quantity and high in precision and is suitable for common electronic mobile terminal equipment, such as mobile phones and tablet personal computers.

Description

technical field [0001] The invention relates to a three-dimensional indoor positioning method using visible light communication, which belongs to the visible light communication technology. Background technique [0002] In recent years, in order to provide location based services (location based service, LBS), outdoor positioning technologies such as GPS develop rapidly, which provides great convenience for people's life, work and entertainment. GPS needs to receive signal information from satellites. For indoor systems, the obstruction of buildings such as walls will cause serious signal fading. Therefore, other methods are generally used for indoor positioning, such as radio frequency signals, infrared rays, ultrasonic waves, lasers, and the like. Although some technologies and products have been put into use, their positioning accuracy generally ranges from tens of meters to several meters, and the accuracy is relatively low, and they are all affected by electromagnetic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20G01S5/16
CPCG01C21/206G01S5/16
Inventor 许威徐锦丹张华
Owner SOUTHEAST UNIV
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