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http://dx.doi.org/10.5909/JEB.2012.17.1.95

Outage Analysis and Optimal Power allocation for Network-coding-based Hybrid AF and DF  

Bek, Joo-Ha (Samsung Electronics)
Lee, Dong-Hoon (School of Electrical Engineering, Korea University)
Lee, Jae-Young (School of Electrical Engineering, Korea University)
Heo, Jun (School of Electrical Engineering, Korea University)
Publication Information
Journal of Broadcast Engineering / v.17, no.1, 2012 , pp. 95-107 More about this Journal
Abstract
Network coding was proposed to increase the achievable throughput of multicast in a network. Recently, combining network coding into user cooperation has attracted research attention. For cooperative transmission schemes with network coding, users combine their own and their partners messages by network coding. In previous works, it was shown that adaptive DF with network coding can achieve diversity gain and additional throughput gain. In this paper, to improve performance of conventional protocols and maximize advantage of using network coding, we propose a new network coding based user cooperation scheme which uses adaptively amplify-and-forward and decode-and-forward according to interuser channel status. We derive outage probability bound of proposed scheme and prove that it has full diversity order in the high SNR regime. Moreover, based on the outage bound, we compute optimal power allocation for the proposed scheme.
Keywords
Cooperative communication; network coding; hybrid AF and DF; outage probability; power allocation; transmit diversity;
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