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Optimal beamforming in MISO cognitive channels with degraded message sets
Dresden University of Technology. (Communications Laboratory)
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
Dresden University of Technology. (Communications Laboratory)
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-9307-484X
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2012 (English)In: Wireless Communications and Networking Conference (WCNC), 2012 IEEE, IEEE Communications Society, 2012, 538-543 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we consider the coexistence of a single-input single-output (SISO) primary link with a multiple-input single-output (MISO) secondary user pair that has non-causal knowledge of the primary message. We study an achievable rate region that exploits this knowledge by combining selfless relaying to maintain the rate supported by the primary link with dirty paper coding to pre-cancel the interference at the secondary receiver. We find the optimal choice of power allocation between these operating modes at the secondary transmitter as well as the optimal beamforming vectors. Moreover, we address the robustness of the solution to uncertainties in the channel knowledge. Finally, we show by numerical evaluation the gains obtained due to the additional knowledge of the primary message.

Place, publisher, year, edition, pages
IEEE Communications Society, 2012. 538-543 p.
Series
IEEE Wireless Communications and Networking Conference. Proceedings, ISSN 1525-3511
Keyword [en]
Beamforming, Computer simulation, Wireless telecommunication systems
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-51501DOI: 10.1109/WCNC.2012.6214426Scopus ID: 2-s2.0-84864339724ISBN: 978-146730437-5 (print)OAI: oai:DiVA.org:kth-51501DiVA: diva2:464303
Conference
IEEE Wireless Communications and Networking Conference, WCNC 2012; Paris; 1 April 2012 through 4 April 2012
Funder
ICT - The Next Generation
Note

QC 20120905

Available from: 2012-11-14 Created: 2011-12-13 Last updated: 2013-10-01Bibliographically approved

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fulltext(206 kB)253 downloads
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Thobaben, Ragnar

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Blasco-Serrano, RicardoJorswieck, EduardThobaben, Ragnar
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