Non-orthogonal Amplify-and-Forward for Block-Fading Channels

Ioannis Krikidis, John Thompson, Norbert Goertz, Stephen McLaughlin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we deal with the Amplify-and-Forward (AF) cooperative strategy in slot-based block-fading environments. In contrast with previous schemes which assume a constant channel during the cooperative frame (several slots), here, we relax this constraint and assume a classical quasi-static block-fading channel (constant for one slot). This additional degree of freedom modifies the behavior of the conventional Non-orthogonal (NAF) schemes and generates a new Block-Fading NAF (BFNAF) protocol where the source can usefully retransmit the same data during the cooperative slot. This new protocol is interesting at low spectral efficiencies where diversity against fading is more important. Another issue which is discussed throughout the paper is the optimal power allocation of the investigated schemes. The proposed power allocation strategy uses as an optimization criterion well-defined asymptotic expressions of the outage probabilities, averaged over the fading statistics.

Original languageEnglish
Title of host publication2008 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-6
Subtitle of host publication IEEE International Symposium on Information Theory
Place of PublicationNEW YORK
PublisherIEEE
Pages842-846
Number of pages5
ISBN (Electronic)978-1-4244-2256-2
ISBN (Print)978-1-4244-2256-2
DOIs
Publication statusPublished - 2008
EventIEEE International Symposium on Information Theory - Toronto
Duration: 6 Jul 200811 Jul 2008

Conference

ConferenceIEEE International Symposium on Information Theory
CityToronto
Period6/07/0811/07/08

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  • Cite this

    Krikidis, I., Thompson, J., Goertz, N., & McLaughlin, S. (2008). Non-orthogonal Amplify-and-Forward for Block-Fading Channels. In 2008 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS, VOLS 1-6: IEEE International Symposium on Information Theory (pp. 842-846). IEEE. https://doi.org/10.1109/ISIT.2008.4595105