Open AccessEnhanced performance of visible light communication employing 512-QAM N-SC-FDE and DD-LMS
Author(s) -
Yuanquan Wang,
Xingxing Huang,
Junwen Zhang,
Yiguang Wang,
Nan Chi
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.015328
Subject(s) - visible light communication , quadrature amplitude modulation , qam , optics , computer science , wavelength division multiplexing , bandwidth (computing) , adaptive equalizer , bit error rate , equalization (audio) , electronic engineering , light emitting diode , telecommunications , physics , wavelength , channel (broadcasting) , engineering
In this paper, a novel hybrid time-frequency adaptive equalization algorithm based on a combination of frequency domain equalization (FDE) and decision-directed least mean square (DD-LMS) is proposed and experimentally demonstrated in a Nyquist single carrier visible light communication (VLC) system. Adopting this scheme, as well with 512-ary quadrature amplitude modulation (512-QAM) and wavelength multiplexing division (WDM), an aggregate data rate of 4.22-Gb/s is successfully achieved employing a single commercially available red-green-blue (RGB) light emitting diode (LED) with low bandwidth. The measured Q-factors for 3 wavelength channels are all above the Q-limit. To the best of our knowledge, this is the highest data rate ever achieved by employing a commercially available RGB-LED.