Journal ArticleDOI
Multiple access scheme based on block encoding time division multiplexing in an indoor positioning system using visible light
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TLDR
A multiple access scheme based on block encoding time division multiplexing (TDM) that provides a better performance than the conventional TDM and is more applicable to the accurate positioning of a moving device.Abstract:
In view of the application of a visible light positioning system in a public indoor environment with numerous light emitting diodes (LEDs), a long delay is one of the main factors that limits the performance of the positioning systemwith a moving device. To solve this problem, a multiple access scheme based on block encoding time division multiplexing (TDM) is proposed in this paper. In our scheme, nine LEDs compose one block to reduce the system delay. Meanwhile, in order to reduce intercell interference, an extended binary coded decimal code is used to encode signals transmitted by LEDs. The feasibility and performance of the scheme is demonstrated by simulations. The results show that the proposed TDMscheme provides a better performance than the conventional TDM and is more applicable to the accurate positioning of a moving device.read more
Citations
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A Survey of Positioning Systems Using Visible LED Lights
Yuan Zhuang,Luchi Hua,Longning Qi,Jun Yang,Pan Cao,Yue Cao,Yongpeng Wu,John Thompson,Harald Haas +8 more
TL;DR: A thorough investigation into current LED-based indoor positioning systems and compares their performance through many aspects, such as test environment, accuracy, and cost is undertaken.
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Indoor Positioning Systems Based on Visible Light Communication: State of the Art
Junhai Luo,Liying Fan,Husheng Li +2 more
TL;DR: This paper surveys over 100 papers ranging from pioneering papers to the state-of-the-art in the field to present the positioning technology, and emphasizes and analyzes the accuracy of VLC-based-IPS in the experiment and simulation environments.
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Underwater Optical Wireless Communications, Networking, and Localization: A Survey
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Underwater Optical Wireless Communications, Networking, and Localization: A Survey
TL;DR: In this article, the authors provide a comprehensive survey on the challenges, advances, and prospects of underwater optical wireless networks (UOWNs) from a layer by layer perspective which includes: 1) Potential network architectures; 2) Physical layer issues including propagation characteristics, channel modeling, and modulation techniques 3) Data link layer problems covering link configurations, link budgets, performance metrics, and multiple access schemes; 4) Network layer topics containing relaying techniques and potential routing algorithms; 5) Transport layer subjects such as connectivity, reliability, flow and congestion control.
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Indoor Position Tracking Using Multiple Optical Receivers
TL;DR: A novel positioning system using multiple optical receivers that provides coordinates and an orientation of the mobile receiver and Experimental results show that mean position errors of less than 0.06 m is achievable even when the average receiver speed is 1.3 m/s.
References
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Proceedings ArticleDOI
RADAR: an in-building RF-based user location and tracking system
TL;DR: RADAR is presented, a radio-frequency (RF)-based system for locating and tracking users inside buildings that combines empirical measurements with signal propagation modeling to determine user location and thereby enable location-aware services and applications.
Journal ArticleDOI
The active badge location system
TL;DR: A novel system for the location of people in an office environment is described, where members of staff wear badges that transmit signals providing information about their location to a centralized location service, through a network of sensors.
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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.
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
Indoor optical wireless communication: potential and state-of-the-art
TL;DR: This article aims at reviewing and summarizing recent advancements in OW communication, with the main focus on indoor deployment scenarios, including a discussion of challenges, potential applications, state of the art, and prospects.
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