Relay selection issues for amplify-and-forward cooperative systems with interference

Ioannis Krikidis, John Thompson, Stephen McLaughlin

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

12 Citations (Scopus)


In this paper, an Amplify-and-Forward (AF) cooperative strategy in interference limited networks is considered. In contrast to previously reported work, where the effect of interference is ignored, the effect of multi-user interference in AF schemes is analyzed. It is shown that the interference changes the statistical description of the conventional AF protocol and a statistical expression is subsequently derived. Asymptotic analysis of the expression shows that interference limits the diversity gain of the system and the related channel capacity is bounded by a stationary point. In addition, it is proven that previously proposed relay selection criteria for multi-relay scenarios become inefficient in the presence of interference. Based on a consideration of the interference term, two new selection criteria suitable for different system set-ups are proposed. A theoretical framework for selecting when to apply the proposed selection criteria is also presented.

Original languageEnglish
Title of host publicationIEEE Wireless Communications and Networking Conference, 2009
Number of pages6
ISBN (Electronic)978-1-4244-2948-6
ISBN (Print)978-1-4244-2947-9
Publication statusPublished - 2009
EventIEEE Wireless Communications and Networking Conference - Budapest, Hungary
Duration: 5 Apr 20098 Apr 2009


ConferenceIEEE Wireless Communications and Networking Conference
Abbreviated titleWCNC 2009


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