Proceedings ArticleDOI
Visible light communication using OFDM
M.Z. Afgani,Harald Haas,Hany Elgala,Dietmar Knipp +3 more
- pp 129-134
Reads0
Chats0
TLDR
It is demonstrated theoretically and by means of an experimental system that the high peak-to-average ratio in OFDM can be exploited constructively in visible light communication to intensity modulate LEDs.Abstract:
In this paper wireless communication using white, high brightness LEDs (light emitting diodes) is considered. In particular, the use of OFDM (orthogonal frequency division multiplexing) for intensity modulation is investigated. The high peak-to-average ratio (PAR) in OFDM is usually considered a disadvantage in radio frequency transmission systems due to non-linearities of the power amplifier. It is demonstrated theoretically and by means of an experimental system that the high PAR in OFDM can be exploited constructively in visible light communication to intensity modulate LEDs. It is shown that the theoretical and the experimental results match very closely, and that it is possible to cover a distance of up to one meter using a single LED.read more
Citations
More filters
Journal ArticleDOI
Performance analysis of precoding-based asymmetrically clipped optical orthogonal frequency division multiplexing wireless system in additive white Gaussian noise and indoor multipath channel
TL;DR: Simulation and analytical results show that precoding schemes such as discrete Fourier transform, discrete cosine transform, and Zadoff-Chu sequences do not affect the performance of the OW systems in the AWGN channel while they do reduce the peak-to-average power ratio (PAPR) of the OFDM output signal.
Throughput, power consumption and interference considerations in visible light communication
TL;DR: A novel predistorter and a parameter estimation approach are proposed to overcome LED nonlinearity for high-speed VLC, which fail to reduce the Inter-Symbol Interference (ISI) induced by those nonlinear properties.
Proceedings ArticleDOI
Opportunistic channel reuse for a self-organized visible light communication personal area network
TL;DR: This work proposed interference bounded opportunistic channel allocation strategies for visible light communication personal area network (VPAN) in a cost effective manner which intends to maximize the sum rate capacity in the downlink channel and thereby allow maximum number of users within a target QoS.
Proceedings ArticleDOI
Visible light communication system based on multi-level pulse code modulation
Ziyan Jia,Liwei Yuan,Hui Guo +2 more
TL;DR: It is proved that applying the MPCM in VLC system is feasible and effective, and a set of system prototype is developed that is reasonable and stable.
Proceedings ArticleDOI
OFDM and SCFDE performance comparison for indoor optical wireless communication systems
TL;DR: It is shown that, indeed, OWSCFDE system has low PAPR as compared to the corresponding OFDM system, however, the performance of OW OFDM systems and their counterpart SCFDE systems are traded off for certain input signal powers and modulation orders.
References
More filters
Book
Wireless Infrared Communications
Joseph M. Kahn,John R. Barry +1 more
TL;DR: The use of infrared radiation as a medium for high-speed short-range wireless digital communication, and several modification formats, including on-off keying (OOK), pulse-position modulation (PPM), and subcarrier modulation, are discussed.
Journal ArticleDOI
Fundamental analysis for visible-light communication system using LED lights
T. Komine,Masao Nakagawa +1 more
TL;DR: Based on numerical analyses, it is shown that the proposed indoor visible-light communication system utilizing white LED lights is expected to be the indoor communication of the next generation.
Journal ArticleDOI
Wireless in-house data communication via diffuse infrared radiation
F.R. Gfeller,U. Bapst +1 more
TL;DR: In this paper, a novel wireless broadcast/multi-access channel for flexibly interconnecting a cluster of data terminals located within the same room is described, where the transmission medium is diffusively scattered infrared radiation at 950-nm wavelength.
Reference EntryDOI
Wireless Infrared Communications
TL;DR: In this article, the major optical design issues and communication design issues are discussed, along with a comparison of infrared systems to radio systems, and an overview of current systems and standards is provided.
Journal ArticleDOI
Simulation of multipath impulse response for indoor wireless optical channels
TL;DR: A recursive method for evaluating the impulse response of an indoor free-space optical channel with Lambertian reflectors, which enables accurate analysis of the effects of multipath dispersion on high-speed indoor optical communication systems.