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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Proceedings ArticleDOI
An overview of indoor OFDM/DMT optical wireless communication systems
TL;DR: It is shown that LED clipping has significant impact on the performance of all these systems and the performanceof these systems substantially depends on the considered modulation order.
Wireless Myths, Realities, and Futures: From 3G/4G to Optical and Quantum Wireless This paper evaluates both the operational third-generation (3G) as well as the emerging fourth-generation (4G) wireless systems and investigates new technologies that might transpire and change things in the future.
TL;DR: Evaluating both the operational 3G as well as the emerging fourth-generation (4G) wireless systems are evaluated and it is demonstrated that there is a substantial difference between their theoretical and their practically attainable performance.
Proceedings ArticleDOI
Visible Light Communications-Recent Progresses and Future Outlooks
Yueqiao Zheng,Minglun Zhang +1 more
TL;DR: This paper reviews the recent improvements on bandwidth extension and methods increasing transmission speed at first, major application areas of the visible light communications are discussed, and a conclusion and prospects are given.
Journal ArticleDOI
Demonstration of Non-Hermitian Symmetry (NHS) IFFT/FFT Size Efficient OFDM Non-Orthogonal Multiple Access (NOMA) for Visible Light Communication
TL;DR: A non-orthogonal multiple access (NOMA) visible light communication (VLC) system using non-Hermitian symmetry (NHS) inverse-fast-Fourier-transform (IFFT)/FFT size efficient (SE) orthogonal frequency division multiplexing (OFDM) is proposed and experimentally demonstrated.
Journal ArticleDOI
Investigation of DC-Biased Optical OFDM With Precoding Matrix for Visible Light Communications: Theory, Simulations, and Experiments
Jiang Tao,Ming Tang,Rui Lin,Zhenhua Feng,Xi Chen,Lei Deng,Songnian Fu,Xiang Li,Wu Liu,Deming Liu +9 more
TL;DR: Simulation results demonstrate the complementary cumulative distribution function of PAPR can be reduced ∼3 dB, while the performance of clipping distortion power and clipping error probability are significantly improved, and experiment results are consistent with the theoretical analysis.
References
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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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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.
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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.
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Wireless Infrared Communications
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Simulation of multipath impulse response for indoor wireless optical channels
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