Link Layer Protocol Performance of Indoor Infrared Wireless Communications PDF Download

Author: Vasileios Vitsas
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Peter Jay Barker
Publisher:
ISBN:
Category :
Languages : en
Pages : 201

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Author: Murat Uysal
Publisher: Springer
ISBN: 3319302019
Category : Technology & Engineering
Languages : en
Pages : 639

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Book Description
This book focuses on optical wireless communications (OWC), an emerging technology with huge potential for the provision of pervasive and reliable next-generation communications networks. It shows how the development of novel and efficient wireless technologies can contribute to a range of transmission links essential for the heterogeneous networks of the future to support various communications services and traffic patterns with ever-increasing demands for higher data-transfer rates. The book starts with a chapter reviewing the OWC field, which explains different sub-technologies (visible-light, ultraviolet (UV) and infrared (IR) communications) and introduces the spectrum of application areas (indoor, vehicular, terrestrial, underwater, intersatellite, deep space, etc.). This provides readers with the necessary background information to understand the specialist material in the main body of the book, which is in four parts. The first of these deals with propagation modelling and channel characterization of OWC channels at different spectral bands and with different applications. The second starts by providing a unified information-theoretic treatment of OWC and then discusses advanced physical-layer methodologies (including, but not limited to: advanced coding, modulation diversity, cooperation and multi-carrier techniques) and the ultimate limitations imposed by practical constraints. On top of the physical layer come the upper-layer protocols and cross-layer designs that are the subject of the third part of the book. The last part of the book features a chapter-by-chapter assessment of selected OWC applications. Optical Wireless Communications is a valuable reference guide for academic researchers and practitioners concerned with the future development of the world’s communication networks. It succinctly but comprehensively presents the latest advances in the field.

Author: Roberto Ramirez-Iniguez
Publisher: CRC Press
ISBN: 1420013440
Category : Computers
Languages : en
Pages : 376

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Book Description
Over the last three decades, interest in Infrared (IR) technology as a medium to convey information has grown considerably. This is reflected by the increasing number of devices such as laptops, PDAs, and mobile phones that incorporate optical wireless transceivers and also by the increasing number of optical wireless links available for indoor and

Author: Ke Wang
Publisher: CRC Press
ISBN: 1000765555
Category : Technology & Engineering
Languages : en
Pages : 201

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Book Description
This book aims to give an overview of recent developments in indoor near-infrared optical wireless communication technologies and systems, including basic theories, operating fundamentals, system architectures, modelling, experimental demonstrations, advanced techniques, and most recently, the research efforts towards integrations. Both line-of-sight and diffusive-signals-based options will be reviewed, to provide readers a complete picture about this rapidly developing area, which targets the provision of high-speed wireless connectivity to end- users in indoor environments, such as offices, homes and shopping centres, to satisfy the growing high-speed communication requirement. Provides a systematic approach for the fundamentals of indoor optical wireless communications. Provides an overview of recent developments in indoor infrared optical wireless communications, including theoretical fundamentals. Examines system architectures, modelling, experimental demonstrations, and the research efforts towards integrations. Dr. Ke Wang is an Australian Research Council (ARC) DECRA Fellow and a senior lecturer in the School of Engineering, Royal Melbourne Institute of Technology (RMIT University), VIC, Australia. He worked with the University of Melbourne, Australia, and Stanford University, California, before joining RMIT University. He has published over 110 peer-reviewed papers in top journals and leading international conferences, including over 20 invited papers. He has been awarded several prestigious national and international awards as recognition of research contributions, such as the Victoria Fellowship, the AIPS Young Tall Poppy Science Award, and the Marconi Society Paul Baran Young Scholar Award. His major areas of interest include: silicon photonics integration, opto-electronics integrated devices and circuits, nanophotonics, optical wireless technology for short-range applications, quasi-passive reconfigurable devices and applications and optical interconnects in data -centres and high-performance computing.

Author: Roberto Ramirez-Iniguez
Publisher: CRC Press
ISBN: 1000654524
Category : Technology & Engineering
Languages : en
Pages : 294

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Book Description
Over the last three decades, interest in Infrared (IR) technology as a medium to convey information has grown considerably. This is reflected by the increasing number of devices such as laptops, PDAs, and mobile phones that incorporate optical wireless transceivers and also by the increasing number of optical wireless links available for indoor and

Author: Jean Walrand
Publisher: Morgan Kaufmann
ISBN: 1558605746
Category : Computers
Languages : en
Pages : 716

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Book Description
Retaining the first edition's technology-centred perspective, this book gives readers a sound understanding of packed-switched, circuit-switched and ATM networks, and techniques for controlling them.

Author: Mohammad S. Obaidat
Publisher:
ISBN:
Category : Computers
Languages : en
Pages : 374

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Book Description
SPECTS'98 features many presentations of performance evaluation of computer & telecommunication systems. Among these, ATM systems, tracing techniques, teletraffic engineering, quality of service, memory systems, parallel & distributed processing, interconnection networks, network management, high-speed networking, high-performance computing/computers, algorithms, performance measurement, mobile computing & networking, architectures, workload characterization, congestion control & admission, resource allocation, wireless systems, protocols, & others. This year's proceedings includes top-quality papers from all over the world, with representation from academia, industry, business & government.

Author: Mohammad Reza Pakravan
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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The emergence of portable computing devices is expected to accelerate the introduction of wireless Local Area Networks (LANs). Portable devices require connectivity with low power consumption, small size and weight. The demand for inexpensive, high-speed communication links satisfying these requirements his encouraged the research on infrared wireless communications. In this thesis, the fundamentals of infrared communications and different suitable configurations are reviewed. The basic nature of the infrared channel, the differences between the infrared channel and radio frequency channel and the important communication problems faced by infrared systems are explained. An infrared channel simulation algorithm that is used to estimate its impulse response is described. An extensive set of measurements has been performed to investigate the effects of receiver rotation, receiver shadowing, receiver displacement, transmission configuration and communications environments on the characteristics of the infrared channel. The characteristics of the wide-band measurement system that was used to collect the infrared channel transfer functions are presented. The objectives, procedures, results and conclusions of these measurements are discussed and reported. Diffusers are an important element of infrared transmission systems. They are used to control the radiation pattern of the transmitter for efficiency and eye-safety. Holographic diffusers have been designed and manufactured to provide better infrared radiation patterns. These diffusers were used in the measurement setup to assess the performance enhancements that can be achieved by using holographic diffusers. The results show uniform and efficient use of optical power and better tolerance to shadowing by using these devices.

Author: John R. Barry
Publisher: Springer Science & Business Media
ISBN: 1461527007
Category : Technology & Engineering
Languages : en
Pages : 186

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Book Description
The demand for wireless access to network services is growing in virtually all communications and computing applications. Once accustomed to unteathered opera tion, users resent being tied to a desk or a fixed location, but will endure it when there is some substantial benefit, such as higher resolution or bandwidth. Recent technolog ical advances, however, such as the scaling of VLSI, the development of low-power circuit design techniques and architectures, increasing battery energy capacity, and advanced displays, are rapidly improving the capabilities of wireless devices. Many of the technological advances contributing to this revolution pertain to the wireless medium itself. There are two viable media: radio and optical. In radio, spread-spectrum techniques allow different users and services to coexist in the same bandwidth, and new microwave frequencies with plentiful bandwidth become viable as the speed of the supporting low-cost electronics increases. Radio has the advantage of being available ubiquitously indoors and outdoors, with the possibility of a seam less system infrastructure that allows users to move between the two. There are unan swered (but likely to be benign) biological effects of microwave radiation at higher power densities. Optical communications is enhanced by advances in photonic devices, such as semiconductor lasers and detectors. Optical is primarily an indoor technology - where it need not compete with sunlight - and offers advantages such as the immediate availability of a broad bandwidth without the need for regulatory approval.