Active Pre-Equalizer for Broadband over Visible Light

Tomas Stratil,Radek Martinek,Petr Koudelka,Tomas Novak

doi:10.15598/aeee.v15i3.2210

Tomas Stratil, Radek Martinek + Show 2 more

Open Access

https://doi.org/10.15598/aeee.v15i3.2210

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Abstract

This paper introduces a new technology called Broadband over Visible Light (BVL) which combines two technology solutions like Visible Light Communication(VLC) and Broadband over Power Line (BPL). This new technology is suitable for converting modern LED lighting systems into communication systems. However, there are some deficiencies in BVL technology such as the low bandwidth of LED optical transmitters. Pre-equalization may be solution of this problem. This paper proposes higher bandwidth using the pre-equalization circuit. Also, it shows real experimental results demonstrating an improvement of bandwidth and transmission rate.

Highlights

The recent development in the area of white LEDs caused their common use as a highly efficient alternative to the conventional sources of optical radiation in the visible range
The physical principles, including changes in trends of the lighting technology, caused the emergence of a new research direction generally called Visible Light Communication (VLC), which is a derivative of original research direction generally known as indoor Optical Wireless Communication, operating exclusively in the infra-red spectrum of optical radiation
Compared to the VLC concept, in the case of Broadband over Visible Light (BVL), it is intended to use the chipset of the Broadband over Power Line (BPL) technology, which, inter alia, allows the use of the OFDM MQAM modulation format at the number of 1155 sub-carriers in the frequency range from 2 MHz to 32 MHz

Summary

Introduction

The recent development in the area of white LEDs caused their common use as a highly efficient alternative to the conventional sources of optical radiation in the visible range. This development brought progressive changes in the lighting technology. The physical principles, including changes in trends of the lighting technology, caused the emergence of a new research direction generally called Visible Light Communication (VLC), which is a derivative of original research direction generally known as indoor Optical Wireless Communication (indoor OWC), operating exclusively in the infra-red spectrum of optical radiation. The Broadband over Visible Light (BVL) is a new research direction based essentially on VLC technology. It gives us the opportunity to transmit the modulated signal to the optical transmitter by its power lines, and use visible light as a wireless data transmitter

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