Open Access052−1186 Gbit/s OFDM modulation for power-sharing VLC transmission by using VCSEL laser
Author(s) -
ChienHung Yeh,
I-Cheng Lu
Publication year - 2016
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.24.021113
Subject(s) - visible light communication , vertical cavity surface emitting laser , gigabit , optics , bit error rate , orthogonal frequency division multiplexing , bandwidth (computing) , forward error correction , transmission (telecommunications) , modulation (music) , quadrature amplitude modulation , computer science , optical power , laser , physics , electronic engineering , telecommunications , light emitting diode , channel (broadcasting) , decoding methods , engineering , acoustics
In this paper, we propose employing a 682 nm vertical-cavity surface-emitting laser (VCSEL) with 1 GHz bandwidth for high-speed and power-sharing wireless visible light communication (VLC) in the different transmission distances of 2 to 5 m. In the measurement, the data rate of 0.52 to 11.86 Gbit/s (0.44 to 10.8 Gbit/s in a net data rate) can be achieved by using spectral-efficient orthogonal frequency division multiplexing (OFDM) modulation with bit-loading algorithm. Therefore, 4- to 256-quadrature amplitude modulations (QAMs) are employed simultaneously in the modulation bandwidth for VCSEL-based VLC. The proposed power-sharing VLC system can be divided to four end-users, when three beam splitters (BSs) are used simultaneously. Moreover, all of the measured bit error rates (BERs) are below the forward error correction (FEC) threshold (BER = 3.8 × 10 -3 ).