Open AccessOptimized DFT-spread OFDM based visible light communications with multiple lighting sources
Author(s) -
Zi-Yang Wu,
Yuliang Gao,
Ze-Kun Wang,
Chuan You,
Chuang Yang,
Chong Luo,
Jiao Wang
Publication year - 2017
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.25.026468
Subject(s) - visible light communication , orthogonal frequency division multiplexing , baseband , computer science , discrete fourier transform (general) , telecommunications link , electronic engineering , multiplexing , optics , fourier transform , telecommunications , light emitting diode , physics , bandwidth (computing) , engineering , fractional fourier transform , fourier analysis , channel (broadcasting) , quantum mechanics
Discrete Fourier transform spread orthogonal frequency-division multiplexing (DFT-S-OFDM) has demonstrated its capability in reducing peak to average ratio (PAPR), while maintaining reliable transmissions. This paper investigates the application of DFT-S-OFDM technology in visible light communications (VLC), and reveals the mechanism on how a multiple lighting distributed layout affects its performance. In addition, an optimization approach of lighting layout is proposed through making a trade-off between the strong interfered areas and the maximum delay spread inside. Eventually, a Gbit/s DFT-S-OFDM based multiple lighting VLC downlink prototype is achieved for the first time in the form of real-time baseband modem and compact size components.