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2010

Cooperative Decode-and-Forward ARQ Relaying: Performance Analysis and Power Optimization

9 years 9 months ago
Cooperative Decode-and-Forward ARQ Relaying: Performance Analysis and Power Optimization
Abstract--In this paper we develop a new analytical methodology for the evaluation of the outage probability of cooperative decode-and-forward (DF) automatic-repeat-request (ARQ) relaying under packet-rate fading (fast fading or block fading) channels, where the channels remain fixed within each ARQ transmission round, but change independently from one round to another. We consider a single relay forwarding Alamoutibased retransmission signals in the cooperative ARQ scheme. In particular, (i) we derive a closed-form asymptotically tight (as SNR ) approximation of the outage probability; (ii) we show that the diversity order of the DF cooperative ARQ relay scheme is equal to 2 - 1, where is the maximum number of ARQ (re)transmissions; and (iii) we develop the optimum power allocation for the DF cooperative ARQ relay scheme. The closed-form expression clearly shows that the achieved diversity is partially due to the DF cooperative relaying and partially due to the fast fading nature of...
Sangkook Lee, Weifeng Su, Stella N. Batalama, John
Added 22 May 2011
Updated 22 May 2011
Type Journal
Year 2010
Where TWC
Authors Sangkook Lee, Weifeng Su, Stella N. Batalama, John D. Matyjas
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