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Linear Precoding in MISO Cognitive Channels with Causal Primary Message
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
2012 (English)In: 2012 International Symposium on Wireless Communication Systems (ISWCS), IEEE conference proceedings, 2012, 406-410 p.Conference paper, Published paper (Refereed)
Abstract [en]

The coexistence of a single-input single-output (SISO) primary link and a multiple-input single-output (MISO) secondary link is considered in an extended cognitive radio channel setup, where the secondary transmitter has to obtain (“learn”) the primary message in a first phase rather than having non-causal knowledge of it. An achievable rate region is derived that combines decode-and-forward relaying with linear precoding in the second phase. The optimal transmission strategy is found that maximizes the secondary rate with the primary rate requirement. The performance of the proposed strategy is compared with that in [1], where dirty-paper coding (DPC) is deployed in the second phase, in terms of average secondary rate. The performance degradation is negligible at certain SNR and primary link load, and the implementation is of lower complexity. The comparison with the underlay strategy in [2] is also performed, where the secondary transmitter has no knowledge of the primary message.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2012. 406-410 p.
Keyword [en]
Cognitive radio, Complexity theory, Interference, Radio transmitters, Receivers, Signal to noise ratio
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-104534DOI: 10.1109/ISWCS.2012.6328399Scopus ID: 2-s2.0-84871283399ISBN: 978-1-4673-0760-4 (print)OAI: oai:DiVA.org:kth-104534DiVA: diva2:564996
Conference
International Symposium on Wireless Communication Systems (ISWCS), 28-31 Aug. 2012, Paris, France
Funder
EU, FP7, Seventh Framework Programme, 257626ICT - The Next Generation
Note

QC 20121114

Available from: 2012-11-14 Created: 2012-11-05 Last updated: 2013-09-06Bibliographically approved

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Thobaben, Ragnar

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Blasco-Serrano, RicardoThobaben, Ragnar
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