Proceedings ArticleDOI
Visible light communication using OFDM
M.Z. Afgani,Harald Haas,Hany Elgala,Dietmar Knipp +3 more
- pp 129-134
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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
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Book ChapterDOI
A Novel Optical Index Modulation Aided DCO-OFDM Scheme for VLC Systems
TL;DR: A novel optical index modulation (OIM) aided direct-current (DC) biased optical OFDM (O IM-DCO-OFDM) scheme for visible light communication (VLC) systems is proposed, which can achieve 80% spectral efficiency improvement and a unipolar pulse amplitude modulation (PAM) schemes for the modulation of constellation bits.
Proceedings ArticleDOI
Energy efficiency of a wireless communication transmitter with intensity modulation
TL;DR: A high speed optical wireless communication link that uses white-light-emitting diodes is described that investigates the driving architecture about the energy efficiency of LED lightings and the spectral efficiency of communications.
Journal ArticleDOI
Adaptive DCO-FBMC in Visible Light Communication
TL;DR: This paper adapted FBMC using a different technique which resulted in a great decrease in power consumption and the occupied chip area, and saved 50% in the number of the FFT/IFFT (Inverse Fast Fourier Transformer/Fast Fouriers Transformer) operations.
Proceedings ArticleDOI
Solar-Powered Visible Light Communication: A Sustainable and Reliable Solution
TL;DR: In this paper , visible light communication (VLC) is used in place of radio frequency (RF) based wireless communication, which is an optical wireless technology which utilizes visible light of wavelengths (380-780nm), by using the visible light source as a signal transmitter, the air as the channel for the transmission of signal, and the suitable photodiode as a receiver.
Proceedings ArticleDOI
Wide-range Dimmable Clipped Flip-OFDM For Indoor Visible Light Communications
TL;DR: In the proposed clipped flip-OFDM scheme, a new OFDM frame structure is designed to keep the clipped information to achieve different dimming levels by adjusting the values of the direct-current (DC) bias and a control factor.
References
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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.
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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.
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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.
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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.