Journal ArticleDOI
Performance enhancement of outdoor visible-light communication system using selective combining receiver
It Ee Lee,Moh Lim Sim,F. Kung +2 more
TLDR
An analytical daylight noise model based on a modified Blackbody radiation model is proposed to capture the effect of ambient-light noise and an in-depth study on the impact of daylight on the system performance is conducted.Abstract:
New generation of high-intensity aluminium gallium arsenide (AlGaAs) and aluminium indium gallium phosphide (AlInGaP) light-emitting diodes (LEDs) which have permitted the replacement of incandescent-based traffic lights with LED-based traffic lights, unfolds the potential of implementing visible-light communication (VLC) system on outdoor environment. The feasibility of outdoor VLC system is undoubtedly questionable because of the significant ambient-light noise caused by daylight. Existing performance studies related to this system have not taken into account the effect of ambient-light noise which varies largely from day time to night time. The authors propose an analytical daylight noise model based on a modified Blackbody radiation model to capture the effect of ambient-light noise and conduct an in-depth study on the impact of daylight on the system performance. The proposed daylight noise model allows us to perform analytical analysis which produces relatively accurate results with less complexity, as compared to the existing time-consuming simulation. The authors also introduce a new receiver structure employing the selective combining technique to significantly reduce the effect of background noise. From numerical analysis, the authors show that the new receiver structure is able to achieve a signal-to-noise ratio (SNR) improvement of approximately 5 dB and establish a stable communication link at any time of the day.read more
Citations
More filters
Journal ArticleDOI
LED Based Indoor Visible Light Communications: State of the Art
TL;DR: This paper provides a comprehensive survey on VLC with an emphasis on challenges faced in indoor applications over the period 1979-2014.
Journal ArticleDOI
Current Challenges for Visible Light Communications Usage in Vehicle Applications: A Survey
Alin-Mihai Cailean,Mihai Dimian +1 more
TL;DR: This paper addresses the issues related to the VLC usage in vehicular communication applications and proposes several future research directions for the automotive VLC applications and offers a brief review on the associated standardization activities.
Journal ArticleDOI
On Optimizing VLC Networks for Downlink Multi-User Transmission: A Survey
TL;DR: In this article, the authors review the emerging research in the field of VLC networks and lay out the challenges, technological solutions, and future work predictions, and propose several open research problems to optimize the various VLC network by maximizing either the sum rate, fairness, energy efficiency, secrecy rate, or harvested energy.
Journal ArticleDOI
Vehicular Visible Light Communications: A Survey
Agon Memedi,Falko Dressler +1 more
TL;DR: The state of the art of V-VLC is studied, open research questions are identified and the research community as a whole is introduced and the characteristics of the VLC channel are dug into.
Journal ArticleDOI
Performance analysis of a car-to-car visible light communication system
TL;DR: Results show that the wet road surface can help to increase the received optical power and improve the BER performance above a certain distance, and the communications coverage range can reach up to 70 m at a data rate of 50 Mbps when a photodetector is mounted on the car at a height of 0–0.2 m above the road surface.
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
Intelligent Transportation Systems
TL;DR: The scope of this article is to introduce novel functionality for providing knowledge to vehicles, thus jointly managing traffic and safety and to issue directives to the drivers and the overall transportation infrastructure valuable in context handling.
Journal ArticleDOI
Simple Solar Spectral Model for Direct and Diffuse Irradiance on Horizontal and Tilted Planes at the Earth's Surface for Cloudless Atmospheres
Richard E. Bird,C. Riordan +1 more
TL;DR: In this paper, a simple model for calculating direct normal and diffuse horizontal spectral solar irradiance for cloudless sky conditions was described. But the model was developed using rigorous radiative transfer codes and limited outdoor measurements.
Related Papers (5)
Fundamental analysis for visible-light communication system using LED lights
T. Komine,Masao Nakagawa +1 more