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 Performance evaluation of a distributed SFBC relay-assisted scheme for OFDM systems
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/5782

title: Performance evaluation of a distributed SFBC relay-assisted scheme for OFDM systems
authors: Teodoro, Sara
Moço, Andreia
Silva, Adão
Gameiro, Atílio
keywords: Cooperative diversity
OFDM
Relay
Space-frequency block coding
Virtual MIMO
WiMax
Co-operative diversity
Antennas
Doppler effect
Orthogonal frequency division multiplexing
Orthogonal functions
Telecommunication systems
Wimax
Wireless networks
issue date: 2010
abstract: In this paper we investigate the performance of a 2-relay cooperative scheme, where all the nodes are equipped with a single antenna. We consider Decode-and-Forward as relaying protocol and a distributed space-frequency block is employed. Two schemes are proposed: one with and another without the direct path available. Signals expressions are derived under various propagation scenarios, considering power constraint imposed on cooperating nodes. The aim of this work is to evaluate the proposed relay-assisted schemes, under realistic situations (e.g. correlated antennas, precise channel models, Doppler effects) for typical pedestrian scenarios based in WiMax specifications and using channel turbo coding. The coded performance of the proposed relay-assisted schemes is evaluated, considering different modulations, and compared against non-cooperative OFDM based systems. The proposed cooperative scheme outperforms in most of the studied scenarios the SISO and the co-located 2x1 SFBC. Copyright © 2010 The authors.
URI: http://hdl.handle.net/10773/5782
ISBN: 978-1-905824-18-2
source: Future Network and Mobile Summit 2010
appears in collectionsDETI - Comunicações

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