Optimal beamforming in MISO cognitive channels with degraded message sets
2012 (English)In: Wireless Communications and Networking Conference (WCNC), 2012 IEEE, IEEE Communications Society, 2012, 538-543 p.Conference paper (Refereed)
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.
, IEEE Wireless Communications and Networking Conference. Proceedings, ISSN 1525-3511
Beamforming, Computer simulation, Wireless telecommunication systems
IdentifiersURN: urn:nbn:se:kth:diva-51501DOI: 10.1109/WCNC.2012.6214426ScopusID: 2-s2.0-84864339724ISBN: 978-146730437-5OAI: oai:DiVA.org:kth-51501DiVA: diva2:464303
IEEE Wireless Communications and Networking Conference, WCNC 2012; Paris; 1 April 2012 through 4 April 2012
FunderICT - The Next Generation
QC 201209052012-11-142011-12-132013-10-01Bibliographically approved