EURASIP Journal on Wireless Communications and Networking
Volume 2007 (2007), Article ID 14798, 10 pages
doi:10.1155/2007/14798
Research Article
Capacity Versus Bit Error Rate Trade-Off in the DVB-S2 Forward Link
German Aerospace Center (DLR), Institute of Communications and Navigation, Oberpfaffenhofen, Wessling 82234, Germany
Received 5 October 2006; Accepted 12 March 2007
Academic Editor: Ray E. Sheriff
Copyright © 2007 Matteo Berioli 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
The paper presents an approach to optimize the use of satellite capacity in DVB-S2 forward links. By reducing the so-called safety margins, in the adaptive coding and modulation technique, it is possible to increase the spectral efficiency at expenses of an increased BER on the transmission. The work shows how a system can be tuned to operate at different degrees of this trade-off, and also the performance which can be achieved in terms of BER/PER, spectral efficiency, and interarrival, duration, strength of the error bursts. The paper also describes how a Markov chain can be used to model the ModCod transitions in a DVB-S2 system, and it presents results for the calculation of the transition probabilities in two cases.