User scheduling for coordinated dual satellite systems with linear precoding
2013 (English)In: 2013 IEEE International Conference on Communications (ICC), 2013, 4498-4503 p.Conference paper (Refereed)
The constantly increasing demand for interactive broadband satellite communications is driving current research towards novel system architectures that reuse frequency in a more aggressive manner. To this end, the topic of dual satellite systems, in which satellites share spatial (i.e. same coverage area) and spectral (i.e. full frequency reuse) degrees of freedom is introduced. In each multibeam satellite, multiuser interferences are mitigated by employing zero forcing precoding with realistic per antenna power constraints. However, the two sets of users that the transmitters are separately serving, interfere. The present contribution, proposes the partial cooperation, herein referred to as coordination, between the two coexisting transmitters in order to reduce interferences and enhance the performance of the whole system, while maintaining moderate system complexity. In this direction, a heuristic, iterative, low complexity algorithm that allocates users in the two interfering sets is proposed. This novel algorithm, improves the performance of each satellite and of the overall system, simultaneously. The first is achieved by maximizing the orthogonality between users allocated in the same set, hence optimizing the zero forcing performance, whilst the second by minimizing the level of interferences between the two sets. Simulation results show that the proposed method, compared to conventional techniques, significantly increases spectral efficiency.
Place, publisher, year, edition, pages
2013. 4498-4503 p.
, IEEE International Conference on Communications, ISSN 15503607
antenna arrays, array signal processing, computational complexity, frequency allocation, iterative methods, multibeam antennas, multiuser detection, precoding, radiofrequency interference, satellite antennas, antenna power constraints, coordinated dual satellite systems, coverage area, frequency reusability, interactive broadband satellite communications, interference reduction, iterative algorithm, linear precoding, low complexity algorithm, multibeam satellite, multiuser interference mitigation, orthogonality maximization, system architectures, system complexity, user allocation, user scheduling, zero forcing performance, zero forcing precoding, Interference, Resource management, Satellite antennas, Satellite broadcasting, Satellites, Signal to noise ratio, Vectors
IdentifiersURN: urn:nbn:se:kth:diva-139007DOI: 10.1109/ICC.2013.6655276ScopusID: 2-s2.0-84891356630ISBN: 978-146733122-7OAI: oai:DiVA.org:kth-139007DiVA: diva2:682125
2013 IEEE International Conference on Communications, ICC 2013; Budapest, Hungary, 9-13 June, 2013
QC 201403062013-12-232013-12-232014-03-06Bibliographically approved