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Quantifying the Loss of Compress-Forward Relaying Without Wyner-Ziv Coding
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-7926-5081
USC.
2009 (English)In: IEEE Transactions on Information Theory, ISSN 0018-9448, E-ISSN 1557-9654, Vol. 55, no 4, 1529-1533 p.Article in journal (Refereed) Published
Abstract [en]

The compress-and-forward (CF) strategy achieves the optimal diversity-multiplexing tradeoff (DMT) of a three-node half-duplex relay network in slow fading, under the assumption that the relay has perfect knowledge of all three channel coefficients and that the relay makes use of Wyner-Ziv (WZ) source coding with side information. This paper studies the achievable DMT of the same network when the relay is constrained to make use of standard (non-WZ) source coding. Under a short-term power constraint at the relay, using source coding without side information results in a significant loss in terms of the DMT. For multiplexing gains r <= 2/3 this loss can be fully compensated for by using power control at the relay. On the contrary, for r is an element of (2/3, 1), the loss with respect to WZ coding remains significant.

Place, publisher, year, edition, pages
2009. Vol. 55, no 4, 1529-1533 p.
Keyword [en]
Cooperative communications, Diversity methods, Diversity-multiplexing tradeoff (DMT), Fading channels, Power control
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-18298DOI: 10.1109/tit.2009.2013006ISI: 000264632200007Scopus ID: 2-s2.0-64249095546OAI: oai:DiVA.org:kth-18298DiVA: diva2:336344
Note
QC 20100525 QC 20111214Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Skoglund, Mikael

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