Optimising DVB‐S2 spectral efficiency with hierarchical modulation for broadband applications

Summary We study the design of a digital video broadcasting ‐ satellite ‐ second generation broadband system in order to maximise spectral efficiency. This task is usually challenging because of channel variability. The solution adopted in modern satellite communications systems relies mainly on a t...

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Bibliographic Details
Published in:International journal of satellite communications and networking 2017-03, Vol.35 (2), p.151-161
Main Author: Meric, Hugo
Format: Article
Language:English
Subjects:
adaptive coding and modulation
Broadband
Channels
Digital Video Broadcasting
Efficiency
hierarchical modulation
linear programming
Modulation
Optimization
Satellites
Spectra
Online Access:Get full text
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Summary:Summary We study the design of a digital video broadcasting ‐ satellite ‐ second generation broadband system in order to maximise spectral efficiency. This task is usually challenging because of channel variability. The solution adopted in modern satellite communications systems relies mainly on a time‐sharing strategy. Recently, we demonstrated the advantage of combining time sharing with hierarchical modulation to increase the transmission rate of such systems. However, the optimal spectral efficiency remained an open question. In this paper, we show that the optimal transmission rate is the solution of a linear programming problem. We study the performance of the optimal scheme for interactive satellite services in the context of a digital video broadcasting ‐ satellite ‐ second generation system. Copyright © 2015 John Wiley & Sons, Ltd. This article demonstrates that hierarchical modulation can improve the spectral efficiency of broadband applications in a digital video broadcasting–satellite–second‐generation system. The computation of the spectral efficiency relies on solving a linear programming problem. Our proposal achieves significant gains, up to 15%, for a large range of channel quality.
ISSN:1542-0973
1542-0981
DOI:10.1002/sat.1170