Quantifying the Loss of Compress-Forward Relaying Without Wyner-Ziv Coding
2009 (English)In: IEEE Transactions on Information Theory, ISSN 0018-9448, Vol. 55, no 4, 1529-1533 p.Article in journal (Refereed) Published
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.
Cooperative communications, Diversity methods, Diversity-multiplexing tradeoff (DMT), Fading channels, Power control
IdentifiersURN: urn:nbn:se:kth:diva-18298DOI: 10.1109/tit.2009.2013006ISI: 000264632200007ScopusID: 2-s2.0-64249095546OAI: oai:DiVA.org:kth-18298DiVA: diva2:336344
QC 20100525 QC 201112142010-08-052010-08-052011-12-14Bibliographically approved