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Network-coded SIR-based relay selection for multiple-relay TWRC

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  • Slim Chaoui

    (University of Carthage)

Abstract

This paper considers a two-way relay channel (TWRC) that operates in a multiple-relay context with network-coded soft information relaying. During the relaying process, the log likelihood ratio sequence resulting from the network coding of the two soft-in soft-out decoders output sequences is supplied to a soft encoder. In order to mitigate the error-propagation due to the erroneous decoding at the relay, a method is proposed for modelling the soft estimated symbols at the output of the soft encoder which is mathematically convenient to work with. The signal-to-noise ratios of the equivalent one-hop channels towards each end-node are derived. Accordingly, the study proposes two relay selection (RS) schemes based on the network-coded soft information relaying, a sub-optimal Max–Min-based single RS scheme, and a double-side RS scheme. Closed-form expressions for the bit error rate performances and asymptotic pairwise error probabilities of the multiple-relay TWRC with the proposed RS schemes are derived. Monte-Carlo simulations are carried out to verify the accuracy of the analytical results.

Suggested Citation

  • Slim Chaoui, 2016. "Network-coded SIR-based relay selection for multiple-relay TWRC," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 63(4), pages 579-591, December.
  • Handle: RePEc:spr:telsys:v:63:y:2016:i:4:d:10.1007_s11235-016-0143-9
    DOI: 10.1007/s11235-016-0143-9
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    1. Unknown, 2005. "Forward," 2005 Conference: Slovenia in the EU - Challenges for Agriculture, Food Science and Rural Affairs, November 10-11, 2005, Moravske Toplice, Slovenia 183804, Slovenian Association of Agricultural Economists (DAES).
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