Data transmission method, device and related equipment based on visible light communication system

A data transmission method and visible light communication technology, applied in baseband system components, transmission systems, multi-frequency code systems, etc., can solve the problems of signal distortion and nonlinear characteristics of transmission characteristics, improve communication transmission performance, overcome LED non-linear characteristics, etc. Effects of Linear Distortion Effects

Active Publication Date: 2021-10-22
DONGGUAN INST OF OPTO ELECTRONICS PEKING UNIV
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Problems solved by technology

[0004] The embodiment of the present application provides a data transmission method, device, and communication device based on a visible light communication system to solve the problem of signal distortion in the prior art due to the non-linearity of the electro-optical conversion of LEDs and the limited dynamic range, which lead to the non-linearity of the transmission characteristics. question

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  • Data transmission method, device and related equipment based on visible light communication system
  • Data transmission method, device and related equipment based on visible light communication system
  • Data transmission method, device and related equipment based on visible light communication system

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[0060] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0061] The implementation of the present application is described in detail below in conjunction with specific drawings:

[0062] The implementation of the present application is described in detail below in conjunction with specific drawings:

[0063] figure 1 It is a data transmission method based on a visible light communication system in an embodiment of the present application, and the method is applied to the flow chart of the data sending end, combined with the following figure 1 To describe in detail a data transmission method based on a visible light communicati...

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Abstract

This application provides a data transmission method based on a visible light communication system, which is applied in the field of communication and solves the problem of LED nonlinear distortion. A Hermitian conjugate Hermitian symmetric signal, the signal is transformed by IFFT and then added with a CP cyclic prefix to form M second signal sub-blocks, and M serial signal data are obtained after parallel / serial conversion of the second signal sub-blocks, Perform partial linear companding transformation on M serial signal data to obtain M compressed signals, perform D / A digital-to-analog conversion on M compressed signals to obtain M analog signals, and superimpose optimal DC bias on M analog signals Set the signal to obtain M unipolar signals, convert the M unipolar signals into DCO-OFDM optical signals, and send them to the data receiving end through the visible light channel, reducing the influence of LED nonlinear distortion in the visible light communication system and improving system communication. performance.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method, device, communication device and storage medium based on a visible light communication system. Background technique [0002] In recent years, some domestic universities and research institutes in Europe, America, Japan, South Korea and other countries have carried out research on key technologies of visible light communication (Visible Light Communication, VLC). Generally speaking, the status quo of VLC research and development and industrialization has the following characteristics: 1) Although a number of high-speed VLC systems have been developed at home and abroad, there is still a long way to go before standardization and engineering; 2) The VLC industry at home and abroad is still in its infancy In the development stage, my country is one of the countries with a huge lighting industry in the world, with huge potential industrial val...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04L27/26H04L25/06
CPCH04B10/116H04L25/06H04L27/2634H04L27/2666H04L27/2678
Inventor 王琦郑小平李顺峰王永志
Owner DONGGUAN INST OF OPTO ELECTRONICS PEKING UNIV
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