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Visible light communication-based indoor positioning system and method

A visible light communication and indoor positioning technology, which is applied in positioning, radio wave measurement systems, and measurement devices, can solve the problems of large system maintenance costs, high system costs, and low accuracy, and achieve low maintenance costs, simple maintenance, and cost savings The effect of spending

Inactive Publication Date: 2014-06-18
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Active Badge positioning system, based on the indoor marker sensing prototype system, estimates the user's position based on the approximation method, which can only be accurate to the room, so the accuracy is low;
[0004] Active Bat positioning systems, Cricket and SpotON positioning systems usually require the use of a large number of special equipment indoors where positioning is required, resulting in high system costs and high system maintenance costs

Method used

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  • Visible light communication-based indoor positioning system and method
  • Visible light communication-based indoor positioning system and method
  • Visible light communication-based indoor positioning system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Visible light communication uses white light or colored light-emitting diodes to transmit information with high-speed light and dark flickering light signals that are invisible to the naked eye. It is a technology that has been used in indoor communication.

[0049] The indoor positioning system based on visible light communication in this embodiment includes a transmitter and a mobile receiver;

[0050] The transmitting end is composed of several transmitters distributed throughout the room;

[0051] The transmitter includes an LED light source for outputting the location information of the transmitter as an optical signal;

[0052] The mobile receiving end is used for receiving the optical signal, converting it into an electrical signal, and extracting position information from the electrical signal.

[0053] In a specific use process, the LED light source outputs light signals with flashing signals according to the position information that needs to be transmitted. ...

Embodiment 2

[0055] Such as figure 1 As shown, this embodiment is an indoor positioning system based on visible light communication, including a transmitter and a mobile receiver;

[0056] The transmitting end includes several transmitters distributed throughout the room; the number and position of the transmitters are set according to the needs and the preset positioning accuracy;

[0057] The transmitters include:

[0058] The first signal processing unit is used to generate and output the modulation signal capable of driving the LED light source from its position information; if the transmitting end is located at position A, the first signal processing unit modulates its position signal—position A according to the preset The method modulates into a modulated signal recognizable by the LED light source and outputs it to the LED light source connected thereto;

[0059] The LED light source is used to receive the modulated signal and convert it into an optical signal for output; the LED ...

Embodiment 3

[0065] The indoor positioning system based on visible light communication in this embodiment includes a transmitter and a mobile receiver;

[0066] The transmitting end is composed of several transmitters distributed throughout the room;

[0067] The transmitters include:

[0068] The first signal processing unit is used to generate and output the modulation signal capable of driving the LED light source from its location information;

[0069] LED light source, used to receive the modulation signal and convert it into a light signal for output;

[0070] The mobile receiver includes:

[0071] a photoelectric converter for receiving the optical signal and converting it into an electrical signal;

[0072] a second signal processing unit, configured to receive and demodulate the electrical signal to obtain position information;

[0073] The photoelectric converter is a solar cell; the solar cell receives the light signal, absorbs the light energy carried by the light signal an...

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Abstract

The invention discloses a visible light communication-based indoor positioning system and method which are designed for solving the problems of high hardware cost, more system maintenance expense and the like of the existing indoor positioning system and method. The visible light communication-based indoor positioning system comprises a transmitting terminal and a mobile receiving terminal; the transmitting terminal consists of a plurality of transmitters distributed at various places indoors; each transmitter comprises an LED (light-emitting diode) light source for using a photosignal to output the position information of the transmitter; the mobile receiving terminal is used for receiving the photosignal, transforming the photosignal into an electric signal and extracting the corresponding position information from the electric signal. The visible light communication-based indoor positioning method is used in the visible light communication-based indoor positioning system and comprises the steps that one LED light source uses one photosignal to output the position information of the LED light source; the mobile receiving terminal receives the photosignal, transforms the photosignal into the electric signal and extracts the corresponding position information from the electric signal. The visible light communication-based indoor positioning system and method have the advantages of low hardware cost, less system maintenance expense, high accuracy and the like.

Description

technical field [0001] The invention relates to the field of visible light communication, in particular to an indoor positioning system and method based on visible light communication. Background technique [0002] The GPS global positioning system solves the outdoor positioning, but the indoor positioning of leisure office places such as shopping malls and commercial buildings cannot be well solved due to the occlusion of buildings. Existing indoor positioning systems include: [0003] Active Badge positioning system, based on the indoor marker sensing prototype system, estimates the user's position based on the approximation method, which can only be accurate to the room, so the accuracy is low; [0004] Active Bat positioning systems, Cricket and SpotON positioning systems usually require the use of a large number of special equipment indoors where positioning is required, resulting in high system costs and high system maintenance expenses. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G01S5/16
CPCG01S5/16
Inventor 张民韩大海罗鹏飞张翔李青李壮
Owner BEIJING UNIV OF POSTS & TELECOMM
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