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Practical Quantize-and-Forward Schemes for the Frequency Division Relay Channel

EURASIP Journal on Wireless Communications and Networking volume 2007, Article number: 020258 (2008) Cite this article

Abstract

We consider relay channels in which the source-destination and relay-destination signals are assumed to be orthogonal and thus have to be recombined at the destination. Assuming memoryless signals at the destination and relay, we propose a low-complexity quantize-and-forward (QF) relaying scheme, which exploits the knowledge of the SNRs of the source-relay and relay-destination channels. Both in static and quasistatic channels, the quantization noise introduced by the relay is shown to be significant in certain scenarios. We therefore propose a maximum likelihood (ML) combiner at the destination, which is shown to compensate for these degradations and to provide significant performance gains. The proposed association, which comprises the QF protocol and ML detector, can be seen, in particular, as a solution for implementing a simple relaying protocol in a digital relay in contrast with the amplify-and-forward protocol which is an analog solution.

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Authors and Affiliations

  1. CNRS, Supéléc, Paris 11, 3 rue Joliot-Curie, Gif-sur-Yvette, 91190, France

    B Djeumou & S Lasaulce

  2. Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609-2280, USA

    AG Klein

Authors
  1. B Djeumou
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  2. S Lasaulce
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  3. AG Klein
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Correspondence to B Djeumou.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Djeumou, B., Lasaulce, S. & Klein, A. Practical Quantize-and-Forward Schemes for the Frequency Division Relay Channel. J Wireless Com Network 2007, 020258 (2008). https://doi.org/10.1155/2007/20258

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