Reference : Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communic...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/26435
Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communications
English
Christopoulos, Dimitrios [> >]
Chatzinotas, Symeon mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
2014
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
IEEE
14
9
4695--4707
Yes (verified by ORBilu)
International
1536-1276
1558-2248
[en] Broadband multibeam satellite systems ; optimal linear precoding ; sum rate maximization ; multicast multigroup beamforming ; per-antenna constraints ; antenna power constraints ; transmit ; optimization ; downlink
[en] The present work focuses on the forward link of a broadband multibeam satellite system that aggressively reuses the user link frequency resources. Two fundamental practical challenges, namely the need to frame multiple users per transmission and the per-antenna transmit power limitations, are addressed. To this end, the so-called frame-based precoding problem is optimally solved using the principles of physical layer multicasting to multiple co-channel groups under per-antenna constraints. In this context, a novel optimization problem that aims at maximizing the system sum rate under individual power constraints is proposed. Added to that, the formulation is further extended to include availability constraints. As a result, the high gains of the sum rate optimal design are traded off to satisfy the stringent availability requirements of satellite systems. Moreover, the throughput maximization with a granular spectral efficiency versus SINR function, is formulated and solved. Finally, a multicast-aware user scheduling policy, based on the channel state information, is developed. Thus, substantial multiuser diversity gains are gleaned. Numerical results over a realistic simulation environment exhibit as much as 30% gains over conventional systems, even for 7 users per frame, without modifying the framing structure of legacy communication standards.
National Research Fund, Luxembourg under the project "CO2SAT" ; National Research Fund, Luxembourg under the project "SATSENT" ; National Research Fund, Luxembourg under the project "SeMIGod" ; European Space Agency under "PreDem"
http://hdl.handle.net/10993/26435

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