Indoor visible light positioning and information push method based on frequency-shift keying

A frequency-shift keying and information push technology, applied in the field of visible light communication, can solve the problems of poor scalability of synchronization signal positioning and complex equipment, and achieve the effects of reducing equipment redundancy, simple and easy to implement, and easy to implement.

Inactive Publication Date: 2015-11-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] The purpose of the present invention is to propose a method for realizing indoor visible light positioning and information push by frequency shift keying for the problems of poor scalability of synchronous signal positioning and complex equipment in the indoor visible light positioning and information push method based on time division multiplexing. LED does not need to be synchronized to realize positioning and complete information push

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  • Indoor visible light positioning and information push method based on frequency-shift keying
  • Indoor visible light positioning and information push method based on frequency-shift keying
  • Indoor visible light positioning and information push method based on frequency-shift keying

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[0024] The present invention will be described in detail below in conjunction with specific embodiments. The following examples illustrate the present invention in detail, but the specific implementation forms of the present invention are not limited thereto. The description of this implementation is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and scope of application. The content of the description should not be construed as limiting the present invention. Various obvious changes made to it without departing from the spirit of the method described in the present invention and the scope of the claims are within the protection scope of the present invention.

[0025] The method of the present invention is used to construct a system for positioning and pushing advertisement inform...

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Abstract

The invention relates to an indoor visible light positioning and information push method based on frequency-shift keying, and belongs to the technical field of visible light communication. The method comprises the steps: modulating a signal comprising a data frame head, position information (ID) and data information through frequency-shift keying, and transmitting the signal through an LED; distinguishing different LEDs and the intensities of the LEDs at a receiving end through employing fast Fourier transform, obtaining the contents, transmitted by the LEDs, through inverse Fourier transform and a null point detection method, and obtaining the position information and the transmitted contents. The method is simple and practicable, is convenient to achieve, and can neglect the impact from background noises. Compared with a positioning method for transmitting the signal synchronously through the LEDs, the method reduces background redundancy, greatly improves the expansibility, and can eliminate the position error caused by background light.

Description

technical field [0001] The invention relates to an indoor visible light positioning and information pushing method based on frequency shift keying, and belongs to the technical field of visible light communication. Background technique [0002] The indoor positioning solution based on visible light communication (VisibleLightCommunication, VLC) technology uses white light emitted by white semiconductor light-emitting diodes (LightEmittingDiode, LED) as the carrier of positioning signals, so there is no electromagnetic radiation and is not limited by the application environment; and the transmission channel of VLC Generally, a direct channel is used, and the multipath interference is relatively small, so the positioning scheme can achieve relatively high accuracy; in addition, the indoor positioning system based on VLC technology is compatible with the future VLC communication technology, so it does not require expensive hardware equipment investment, cost relatively low. In...

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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 杨爱英冯立辉吕慧超倪国强
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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