Journal ArticleDOI
A Mobile Channel Model for VLC and Application to Adaptive System Design
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TLDR
To demonstrate the benefits of link adaptation over a mobile VLC channel, an adaptive system with luminary selection is proposed and improvements in spectral efficiency over non-adaptive systems are demonstrated.Abstract:
In this letter, we propose a realistic channel model for visible light communication (VLC) assuming a mobile user. Based on non-sequential ray tracing, we first obtain channel impulse responses for each point over the user movement trajectories, and then express path loss and delay spread as a function of distance through curve fitting. Our results demonstrate large variations in received power. In system design, this necessitates the use of adaptive schemes, where transmission parameters can be selected according to channel conditions. To demonstrate the benefits of link adaptation over a mobile VLC channel, we propose an adaptive system with luminary selection and demonstrate improvements in spectral efficiency over non-adaptive systems.read more
Citations
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Journal ArticleDOI
A Survey of 5G Channel Measurements and Models
TL;DR: The requirements of the 5G channel modeling are summarized, an extensive review of the recent channel measurements and models are provided, and future research directions forChannel measurements and modeling are provided.
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.
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White Paper on Broadband Connectivity in 6G
Nandana Rajatheva,Italo Atzeni,Emil Björnson,Andre Bourdoux,Stefano Buzzi,Jean-Baptiste Dore,Serhat Erkucuk,Manuel Fuentes,Ke Guan,Yuzhou Hu,Xiaojing Huang,Jari Hulkkonen,Josep Miquel Jornet,Marcos Katz,Rickard Nilsson,Erdal Panayirci,Khaled M. Rabie,Nuwanthika Rajapaksha,Mohammad Javad Salehi,Hadi Sarieddeen,Shahriar Shahabuddin,Tommy Svensson,Oskari Tervo,Antti Tolli,Qingqing Wu,Wen Xu +25 more
TL;DR: This white paper explores the road to implementing broadband connectivity in future 6G wireless systems, from extreme capacity with peak data rates up to 1 Tbps, to raising the typical data rates by orders-of-magnitude, to support broadband connectivity at railway speeds up to 1000 km/h.
Journal ArticleDOI
Optical Wireless Communication Channel Measurements and Models
TL;DR: The main optical channel characteristics that affect the OWC link performance are investigated and a comprehensive overview of the most important OWCs channel measurement campaigns and channel models are presented.
Journal ArticleDOI
Performance Characterization of Underwater Visible Light Communication
TL;DR: This paper develops a closed-form path loss expression as a function of transceiver parameters and water type and utilizes this new expression to determine the maximum achievable link distance for UVLC systems in pure sea, clear ocean, coastal water, and harbor water.
References
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BookDOI
An introduction to statistical learning
TL;DR: An introduction to statistical learning provides an accessible overview of the essential toolset for making sense of the vast and complex data sets that have emerged in science, industry, and other sectors in the past twenty years.
Journal ArticleDOI
Indoor Channel Characteristics for Visible Light Communications
TL;DR: This letter generalizes the Barry's model by including wavelength-dependent white LED characteristics and spectral reflectance of indoor reflectors and shows that the VLC provides a larger transmission bandwidth than infrared communications.
Journal ArticleDOI
Channel Modeling and Characterization for Visible Light Communications
Farshad Miramirkhani,Murat Uysal +1 more
TL;DR: This study is based on ray tracing, which allows for an accurate description of the interaction of rays emitted from the lighting source within a specified confined space and is capable of obtaining channel impulse responses for any nonideal sources, as well as specular and mixed specular-diffuse reflections.
Journal ArticleDOI
Channel Characteristics of Visible Light Communications Within Dynamic Indoor Environment
TL;DR: This paper considers random movement of people within the room, focusing on the impacts of shadowing and blocking on mobility and link system performance by investigating changes in the channel characteristics using the cumulative distribution function of the received power distribution and the delay profile.
Journal ArticleDOI
A Study of Shadowing on Indoor Visible-Light Wireless Communication Utilizing Plural White LED Lightings
TL;DR: The downlink transmission based on TDMA is considered and the shadowing effect caused by pedestrians with computer simulation is evaluated and it is shown that the system with the optimal number of the LED lighting is robust against shadowing and can accommodate more calls.