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Relay Selection in Cooperative Networks

Relay Selection in Cooperative Networks

Elzbieta Beres, Raviraj Adve
Copyright: © 2010 |Pages: 20
ISBN13: 9781605666655|ISBN10: 1605666653|ISBN13 Softcover: 9781616924010|EISBN13: 9781605666662
DOI: 10.4018/978-1-60566-665-5.ch009
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MLA

Beres, Elzbieta, and Raviraj Adve. "Relay Selection in Cooperative Networks." Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications, edited by Murat Uysal, IGI Global, 2010, pp. 260-279. https://doi.org/10.4018/978-1-60566-665-5.ch009

APA

Beres, E. & Adve, R. (2010). Relay Selection in Cooperative Networks. In M. Uysal (Ed.), Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications (pp. 260-279). IGI Global. https://doi.org/10.4018/978-1-60566-665-5.ch009

Chicago

Beres, Elzbieta, and Raviraj Adve. "Relay Selection in Cooperative Networks." In Cooperative Communications for Improved Wireless Network Transmission: Framework for Virtual Antenna Array Applications, edited by Murat Uysal, 260-279. Hershey, PA: IGI Global, 2010. https://doi.org/10.4018/978-1-60566-665-5.ch009

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Abstract

Cooperative diversity has the potential of implementing spatial diversity and mitigating the adverse effects of channel fading without requiring multiple antennas at transmitters and receivers. Traditionally, cooperative diversity is implemented using maximal ratio combining (MRC), where all available nodes relay signals between the source and destination. It has recently been proposed, however, that for each source-destination transmission, only a single best node should be selected to act as a relay. The resulting scheme, referred to as selection cooperation or opportunistic relaying, outperforms MRC schemes and can be implemented in a distributed fashion with limited feedback. This result is not unexpected, as selection requires some (though very limited) information regarding instantaneous channel conditions, while MRC does not. When implemented in a distributed network, however, MRC does require feedback for the synchronization of nodes, rendering a comparison of the two schemes worthwhile and fair. In this chapter, we provide a detailed overview of selection. We begin with a single source-destination pair, and discuss its implementation and performance under various constraints and scenarios. We then discuss a less-common scenario, a multisource network where nodes act both as sources and as relays.

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