Cooperative diversity with opportunistic relaying

In this paper, we present single-selection-opportunistic-relaying with decode-and-forward (DaF) and amplify-and-forward (AaF) protocols under an aggregate power constraint. We show that opportunistic DaF relaying is equivalent to the outage bound of the optimal DaF strategy using all potential relay...

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Bibliographic Details
Published inIEEE Wireless Communications and Networking Conference, 2006. WCNC 2006 Vol. 2; pp. 1034 - 1039
Main Authors Bletsas, A., Hyundong Shin, Win, M.Z., Lippman, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2006
Subjects
Aggregates
Antennas and propagation
Array signal processing
Costs
Decoding
Fading
Hardware
MIMO
Protocols
Relays
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Summary:In this paper, we present single-selection-opportunistic-relaying with decode-and-forward (DaF) and amplify-and-forward (AaF) protocols under an aggregate power constraint. We show that opportunistic DaF relaying is equivalent to the outage bound of the optimal DaF strategy using all potential relays. We further show that opportunistic AaF relaying is outage-optimal with single-relay selection and significantly outperforms an AaF strategy with multiple-relay (MR) transmissions, in the presence of limited channel knowledge. These findings reveal that cooperative diversity benefits (under an aggregate power constraint) are useful even when cooperative relays choose not to transmit but rather choose to cooperatively listen; they act as passive relays and give priority to the transmission of a single opportunistic relay
ISBN:9781424402694
1424402697
ISSN:1525-3511
1558-2612
DOI:10.1109/WCNC.2006.1683612