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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Journal ArticleDOI
A Study on the Duplex Wireless Communications Using LED Lighting
Gwang-Hyun Key,Kyung-Rak Sohn +1 more
TL;DR: In this paper, an indoor visible-light communication system using an array of light-emitting diodes (L EDs) was proposed and demonstrated using a simplex channel for audio and full-duplex channel for text message.
Proceedings ArticleDOI
On the brightness control of ACO-OFDM based VLC systems
TL;DR: This work maximize the SNDR for a targeted brightness level by jointly optimizing the DC-bias and useful signal power levels and proposes clipping the positive part of the half-wave symmetry information waveform instead of the negative part (for ACO-OFDM signal generation) in order to achieve higher SNDR values at high brightness requirements.
Proceedings ArticleDOI
Experimental demonstration of sub-carrier multiplexing-based MIMO-OFDM system for visible light communication
TL;DR: A novel configuration of VLC(visible light communication) system based on sub-carrier multiplexing of MIMO-OFDM is proposed, which consists of a MIMo array of white LEDs to transmit and receive data.
Proceedings ArticleDOI
Practical VLC to WiFi Handover Mechanisms
TL;DR: A software defined radio (SDR) based VLC+WiFi testbed is designed in which both technologies can coexist, handover mechanisms between VLC and WiFi are designed, and user-induced link blockage measurements in this testbed are evaluated.
Posted Content
Review of LiFi visible light communications : research and use cases.
TL;DR: Real life deployments with a variety of use cases, as well as staggering bandwidth improvements in the lab superior to 10 Gbps, hint to a luminous future for LiFi as a powerful complement or alternative to WiFi and 4G/5G.
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Wireless Infrared Communications
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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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