Open Access45-Gb/s RGB-LED based WDM visible light communication system employing CAP modulation and RLS based adaptive equalization
Author(s) -
Yiguang Wang,
Xingxing Huang,
Li Tao,
Jianyang Shi,
Nan Chi
Publication year - 2015
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.23.013626
Subject(s) - visible light communication , bit error rate , computer science , transmission (telecommunications) , modulation (music) , intersymbol interference , adaptive equalizer , optical wireless , equalization (audio) , interference (communication) , forward error correction , pulse amplitude modulation , free space optical communication , data transmission , communications system , wavelength division multiplexing , electronic engineering , rgb color model , optical communication , telecommunications , optics , channel (broadcasting) , physics , computer hardware , light emitting diode , artificial intelligence , engineering , decoding methods , pulse (music) , wavelength , detector , acoustics
Inter-symbol interference (ISI) is one of the key problems that seriously limit transmission data rate in high-speed VLC systems. To eliminate ISI and further improve the system performance, series of equalization schemes have been widely investigated. As an adaptive algorithm commonly used in wireless communication, RLS is also suitable for visible light communication due to its quick convergence and better performance. In this paper, for the first time we experimentally demonstrate a high-speed RGB-LED based WDM VLC system employing carrier-less amplitude and phase (CAP) modulation and recursive least square (RLS) based adaptive equalization. An aggregate data rate of 4.5Gb/s is successfully achieved over 1.5-m indoor free space transmission with the bit error rate (BER) below the 7% forward error correction (FEC) limit of 3.8x10(-3). To the best of our knowledge, this is the highest data rate ever achieved in RGB-LED based VLC systems.