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Linear Precoding in MISO Cognitive Channels with Causal Primary Message
Dresden University of Technology. (Communications Laboratory)
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
Dresden University of Technology. (Communications Laboratory)
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0001-9307-484X
2012 (engelsk)Inngår i: 2012 International Symposium on Wireless Communication Systems (ISWCS), IEEE conference proceedings, 2012, s. 406-410Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

sted, utgiver, år, opplag, sider
IEEE conference proceedings, 2012. s. 406-410
Emneord [en]
Cognitive radio, Complexity theory, Interference, Radio transmitters, Receivers, Signal to noise ratio
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-104534DOI: 10.1109/ISWCS.2012.6328399Scopus ID: 2-s2.0-84871283399ISBN: 978-1-4673-0760-4 (tryckt)OAI: oai:DiVA.org:kth-104534DiVA, id: diva2:564996
Konferanse
International Symposium on Wireless Communication Systems (ISWCS), 28-31 Aug. 2012, Paris, France
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, 257626ICT - The Next Generation
Merknad

QC 20121114

Tilgjengelig fra: 2012-11-14 Laget: 2012-11-05 Sist oppdatert: 2013-09-06bibliografisk kontrollert

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Thobaben, Ragnar

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