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

Abstract

The invention provides a data transmission method based on a visible light communication system, which is applied to the field of communication, solves the problem of LED nonlinear distortion, and comprises the following steps: carrying out serial / parallel conversion on an original data signal to obtain parallel signal data, modulating the parallel signal data into a signal in an Hermitian symmetric form, and transmitting the signal to a visible light communication system; adding CP cyclic prefixes to the signals after IFFT (inverse fast Fourier transform) to form M second signal sub-blocks, performing parallel / serial conversion on the second signal sub-blocks to obtain M serial signal data, performing partial linear companding conversion on the M serial signal data to obtain M compressedsignals, and performing D / A (digital-to-analog) conversion on the M compressed signals to obtain M analog signals, the optimal DC bias signals are superposed on the M analog signals to obtain M unipolar signals, the M unipolar signals are converted into DCO-OFDM optical signals, and the DCO-OFDM optical signals are sent to a data receiving end through a visible light channel, so that the influenceof LED nonlinear distortion in a visible light communication system is reduced, and the communication performance of the system is improved.

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...

AI Technical Summary

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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