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International Journal of Digital Multimedia Broadcasting
Volume 2009 (2009), Article ID 879290, 10 pages
http://dx.doi.org/10.1155/2009/879290
Research Article

Satellite Media Broadcasting with Adaptive Coding and Modulation

NCSR “Demokritos”, Institute of Informatics and Telecommunications, Patr. Gregoriou & Neapoleos str., Ag. Paraskevi, 153 10 Athens, Greece

Received 11 February 2009; Revised 19 May 2009; Accepted 9 July 2009

Academic Editor: Ivan Bajic

Copyright © 2009 Georgios Gardikis et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Adaptive Coding and Modulation (ACM) is a feature incorporated into the DVB-S2 satellite specification, allowing real-time adaptation of transmission parameters according to the link conditions. Although ACM was originally designed for optimizing unicast services, this article discusses the expansion of its usage to broadcasting streams as well. For this purpose, a general cross-layer adaptation approach is proposed, along with its realization into a fully functional experimental network, and test results are presented. Finally, two case studies are analysed, assessing the gain derived by ACM in a real large-scale deployment, involving HD services provision to two different geographical areas.