Abstract
Visible light communication (VLC) has attracted tremendous attention due to two functions: communication and illumination. Both reliable data transmission and lighting quality need to be considered when the transmitted signal is designed. To achieve the desired levels of illumination, dimming control is an essential technology applied in VLC systems. In this paper, we propose a block coding-based dimming scheme to construct the codeword set, where dimming control can be achieved by changing the ratio of two levels (ON and OFF) based on on-off keying (OOK) modulation. Simulation results show that the proposed scheme can maintain good error performance with constant transmission efficiency under various dimming levels.
Highlights
Light-emitting diode (LED) lighting technology has made significant progress in indoor applications of green lighting [1,2]
In order to solve the problem of the transmission efficiency not being constant under different dimming levels, we propose a block coding-based dimming scheme to achieve data transmission and dimming control simultaneously
Intensity modulation and direct detection (IM/DD) can be applied in the visible light communication (VLC) system, where the message is carried by the light intensity emitted from the light-emitting diode (LED)
Summary
Light-emitting diode (LED) lighting technology has made significant progress in indoor applications of green lighting [1,2]. Dimming control may cause adverse effects on communication To overcome these challenges, some dimming schemes have been proposed in recent years [6,7,8,9,10,11,12]. The analog dimming scheme [7] adjusts the direct current (DC) bias of the transmitted signal to meet the required dimming levels where light intensity is reduced proportionally to the current This approach may change the wavelength of the emitted light, causing a chromaticity shift effect. In order to solve the problem of the transmission efficiency not being constant under different dimming levels, we propose a block coding-based dimming scheme to achieve data transmission and dimming control simultaneously.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
