Multiuser Detection in Multibeam Satellite Systems: Theoretical Analysis and Practical Schemes
Journal article, 2016

We consider the rates achievable by a user in a multibeam satellite system for unicast applications, and propose alternatives to the conventional single-user symbol-by-symbol detection applied at user terminals. Single-user detection is known to suffer from strong degradation when the terminal is located near the edge of the coverage area of a beam, and when aggressive frequency reuse is adopted. For this reason, we consider multiuser detection, and take into account the strongest interfering signal. We also analyze two additional transmission strategies requiring modifications at medium access control layer. We describe an information-theoretic framework to compare the different strategies by computing the information rate of the user in the reference beam. Furthermore, we analyze the performance of coded schemes that could approach the information-theoretic limits.We show that classical codes from the DVB-S2(X) standard are not suitable when multiuser detection is adopted, and we propose two ways to improve the performance, based on the redesign of the code and of the bit mapping.

Multibeam satellite channels

multiuser detection

information rate analysis

Author

Giulio Colavolpe

University of Parma

Andrea Modenini

European Space Research and Technology Centre (ESA ESTEC)

Amina Piemontese

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Alessandro Ugolini

University of Parma

IEEE Transactions on Communications

0090-6778 (ISSN)

Vol. 65 2 945-955 7782367

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/TCOMM.2016.2638903

More information

Latest update

8/23/2019