Download or read book Network Coding in Cooperative Wireless Sensor Networks based on Turbo Product Codes written by Yizhi Yin and published by . This book was released on 2012 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse étudie les performances d'un réseau de capteurs sans-fil coopératif, basé sur un codage réseau algébrique linéaire appliqué au relais. On considère un schéma coopératif basé sur le code produit en bloc où un grand nombre de sources transmettent des données indépendantes codées par un premier code en bloc vers un seul destinataire avec l'aide du relais. Dans ce schéma, le relais applique le codage réseau algébrique linéaire en utilisant un code correcteur d'erreur systématique linéaire en bloc sur les mots de code source détectés par le relais. Seule, la redondance générée par le relais est transférée vers le destinataire. Le destinataire observe un mot de code produit en bloc en combinant les observations des sources et du relais. Premièrement, on aborde la coopération en mode time-division multiple-access (TDMA) et suppose un canal source-relais bruité. On analyse les probabilités théoriques à l'entrée et à la sortie du relais pour différente stratégies de détection au relais. On établit aussi une borne théorique sur la probabilité d'erreur de trame pour le schéma coopératif proposé. Puis on évalue la coopération multi-relais afin de traiter la corrélation des erreurs dans la redondance générée par le relais. Différents configurations de coopération (mono ou multi-relais avec différentes stratégies au relais) sont comparées. On montre que la liaison source-relais est le maillon faible du réseau. On évalue ensuite la capacité du réseau sous la condition de taille finie du code. Ensuite, on étudie la coopération basée sur la technique code-division multiple-access (CDMA) appliqué au relais de telle sorte que le signal du relais est avec ceux des sources dans la même bande de fréquence radio. Pour simplifier l'analyse, on suppose un canal source-relais sans erreur. On propose une procédure de décodage itératif avec la neutralisation de l'interférence. On formule deux cas de coopération basé sur CDMA: TDMA-CDMA avec répartition orthogonale dans le temps entre les sources et FDMA-CDMA avec allocation de sous-bandes de fréquence disjointes pour les sources. Le ratio d'allocation d'énergie entre les sources et le relais est évalué en utilisant les simulations.

Download or read book Mosaics Make a Site written by International Committee for the Conservation of Mosaics. Conference and published by . This book was released on 1996 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Mosaics of Jordan written by Sumaya el_Hassan (Principessa di Giordania.) and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book CIKM 13 written by CIKM 13 Conference Committee and published by . This book was released on 2013-10-27 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt: CIKM'13: 22nd ACM International Conference on Information and Knowledge Management Oct 27, 2013-Nov 01, 2013 San Francisco, USA. You can view more information about this proceeding and all of ACM�s other published conference proceedings from the ACM Digital Library: http://www.acm.org/dl.

Download or read book Governance Regulation and Powers on the Internet written by Eric Brousseau and published by Cambridge University Press. This book was released on 2012-04-23 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interdisciplinary survey of the issues surrounding the governance of the Internet.

Download or read book Green Networking written by Francine Krief and published by John Wiley & Sons. This book was released on 2012-12-13 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on green networking, which is an important topic for the scientific community composed of engineers, academics, researchers and industrialists working in the networking field. Reducing the environmental impact of the communications infrastructure has become essential with the ever increasing cost of energy and the need for reducing global CO2 emissions to protect our environment. Recent advances and future directions in green networking are presented in this book, including energy efficient networks (wired networks, wireless networks, mobile networks), adaptive networks (cognitive radio networks, green autonomic networking), green terminals, and industrial research into green networking (smart city, etc.).

Download or read book Coherent Optical Processing written by Henry J. Caulfield and published by . This book was released on 1975 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cognitive Radio Systems written by Wei Wang and published by . This book was released on 2009 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cognitive radio is a hot research area for future wireless communications in the recent years. In order to increase the spectrum utilization, cognitive radio makes it possible for unlicensed users to access the spectrum unoccupied by licensed users. Cognitive radio let the equipments more intelligent to communicate with each other in a spectrum-aware manner and provide a new approach for the co-existence of multiple wireless systems. The goal of this book is to provide highlights of the current research topics in the field of cognitive radio systems. The book consists of 17 chapters, addressing various problems in cognitive radio systems.

Download or read book First Aid at Work written by HSE Books and published by HSE Books. This book was released on 2009 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Health and Safety (First Aid) Regulations 1981 apply to workplaces in the UK, including those with less than five employees, and to the self-employed.

Download or read book Ionizing and Non ionizing Radiation written by Otolorin Adelaja Osibote and published by . This book was released on 2020 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides readers with comprehensive details on the management and measures to protect health against risks to people and environments generated by the use of ionizing and non-ionizing radiation. This book is divided into three sections, namely, Radiation Protection and Measurement; Radiation Therapy; and Radioactivity. The first section covers ionizing radiation protection; population exposure to non-ionizing density; and the system of dosimetry quantities for use in emergency preparedness and response to nuclear or radiological accidents. The second section covers various planning techniques for spinal stereotactic body radiotherapy and the application of radiation technology in the development of a malaria vaccine. The third section discusses environmental radioactivity monitoring using efficient measurements and the assessment of radiation exposure to humans. Also in this section is the evaluation of the effects of chronic radiation exposure on the testes of mice after a nuclear power plant accident.