Skip to Main content Skip to Navigation
Journal articles

A 40 Mb/s VLC System Reusing an Existing Large LED Panel in an Indoor Office Environment

Abstract : With advances in solid-state lighting, visible light communication (VLC) has emerged as a promising technology to enhance existing light-emitting diode (LED)-based lighting infrastructure by adding data communication capabilities to the illumination functionality. The last decade has witnessed the evolution of the VLC concept through global standardisation and product launches. Deploying VLC systems typically requires replacing existing light sources with new luminaires that are equipped with data communication functionality. To save the investment, it is clearly desirable to make the most of the existing illumination systems. This paper investigates the feasibility of adding data communication functionality to the existing lighting infrastructure. We do this by designing an experimental system in an indoor environment based on an off-the-shelf LED panel typically used in office environments, with the dimensions of 60 × 60 cm2. With minor modifications, the VLC function is implemented, and all of the modules of the LED panel are fully reused. A data rate of 40 Mb/s is supported at a distance of up to 2 m while using the multi-band carrierless amplitude and phase (CAP) modulation. Two main limiting factors for achieving higher data rates are observed. The first factor is the limited bandwidth of the LED string inside the panel. The second is the flicker due to the residual ripple of the bias current that is generated by the panel’s driver. Flicker is introduced by the low-cost driver, which provides bias currents that fluctuate in the low frequency range (less than several kilohertz). This significantly reduces the transmitter’s modulation depth. Concurrently, the driver can also introduce an effect that is similar to baseline wander at the receiver if the flicker is not completely filtered out. We also proposed a solution based on digital signal processing (DSP) to mitigate the flicker issue at the receiver side and its effectiveness has been confirmed.
Document type :
Journal articles
Complete list of metadata

https://hal-amu.archives-ouvertes.fr/hal-03341335
Contributor : Mélanie Dorier <>
Submitted on : Friday, September 10, 2021 - 4:30:50 PM
Last modification on : Tuesday, September 14, 2021 - 3:09:59 AM

File

2021 A 40 Mbs VLC System Reusi...
Publisher files allowed on an open archive

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Xicong Li, Zabih Ghassemlooy, Stanislav Zvánovec, Paul Haigh. A 40 Mb/s VLC System Reusing an Existing Large LED Panel in an Indoor Office Environment. Sensors, MDPI, 2021, 21 (5), pp.1697. ⟨10.3390/s21051697⟩. ⟨hal-03341335⟩

Share

Metrics

Record views

22

Files downloads

22