Power-efficient cooperative coding with hybrid-ARQ soft combining for wireless sensor networks in block-fading environment

Authors:
Hieu T. Nguyen;Ha H. Nguyen;Tho Le-Ngoc
Affiliations:
Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, Canada.;Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, Canada.;Department of Electrical and Computer Engineering, McGill University, Montreal, Quebec, Canada
Venue:
International Journal of Sensor Networks
Year:
2008

Citing 7
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Power-efficient cooperative coding with hybrid-ARQ soft combining for wireless sensor networks in block-fading environment

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Abstract

This paper proposes a combined cooperative coding and hybrid-ARQ scheme suitable for power-efficient transmission in wireless sensor networks. By exploiting cooperative coding in multiple-node wireless sensor networks to provide spatial diversity in addition to time diversity offered by Automatic Retransmission Request (ARQ), the proposed scheme can support high-performance transmission at low power consumption. Analytical derivations of both the throughput and bit error probability of the proposed transmission scheme, using a tree representation, are obtained. Simulation and analytical results are in good agreement and show that the proposed scheme can offer a significant saving in the transmitted power for a target link performance while maintaining the same throughput as compared to the traditional non cooperative hybrid-ARQ scheme. In particular, the power saving increases at higher link performance requirements.