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Multicast Multigroup Precoding and User Scheduling for Frame-Based Satellite Communications
Univ Luxembourg. (Signal Processing)ORCID iD: 0000-0003-2298-6774
2015 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 14, no 9, p. 4695-4707Article in journal (Refereed) Published
Abstract [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.

Place, publisher, year, edition, pages
2015. Vol. 14, no 9, p. 4695-4707
Keywords [en]
Broadband multibeam satellite systems; optimal linear precoding; sum rate maximization; multicast multigroup beamforming; per-antenna constraints
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-259154DOI: 10.1109/TWC.2015.2424961ISI: 000363205300002Scopus ID: 2-s2.0-84969888647OAI: oai:DiVA.org:kth-259154DiVA, id: diva2:1350599
Note

QC 20191011

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-10-11Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf