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Article

Energy-Efficient Path Selection Using SNR Correlation for Wireless Multi-Hop Cooperative Communications

by 1 and 2,*
1
Department of Electrical, Electronic and Control Engineering, Hankyong National University, Anseong 17579, Korea
2
Department of Information and Telecommunication Engineering, Incheon National University, Incheon 22012, Korea
*
Author to whom correspondence should be addressed.
Energies 2018, 11(11), 3004; https://doi.org/10.3390/en11113004
Received: 21 September 2018 / Revised: 15 October 2018 / Accepted: 31 October 2018 / Published: 1 November 2018
In this paper, we consider partial path selection (PPS) for a multi-hop decode-and-forward cooperative system with limited channel state information (CSI) feedback, where the PPS utilizes local CSI only for a subset of hops on each of all independent paths between a source and a destination to reduce the energy consumption for CSI feedback. To enhance the end-to-end performance of the PPS, we propose a novel PPS method with local CSI chosen by the correlation between the end-to-end signal-to-noise ratios (SNRs) based on global and local CSI under Nakagami-m fading channels. For each path, we pick a subset of hops to report CSI with the highest correlation for a given CSI feedback overhead requirement, which can achieve the similar end-to-end outage probability to the best path selection with global CSI. We provide an exact and closed-form expression for the SNR correlation coefficient and present an impact of the SNR correlation on the end-to-end outage probability. View Full-Text
Keywords: multi-hop decode-and-forward relaying; limited channel feedback; SNR correlation; relay selection; Nakagami fading channels multi-hop decode-and-forward relaying; limited channel feedback; SNR correlation; relay selection; Nakagami fading channels
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MDPI and ACS Style

Lee, I.-H.; Jung, H. Energy-Efficient Path Selection Using SNR Correlation for Wireless Multi-Hop Cooperative Communications. Energies 2018, 11, 3004. https://doi.org/10.3390/en11113004

AMA Style

Lee I-H, Jung H. Energy-Efficient Path Selection Using SNR Correlation for Wireless Multi-Hop Cooperative Communications. Energies. 2018; 11(11):3004. https://doi.org/10.3390/en11113004

Chicago/Turabian Style

Lee, In-Ho, and Haejoon Jung. 2018. "Energy-Efficient Path Selection Using SNR Correlation for Wireless Multi-Hop Cooperative Communications" Energies 11, no. 11: 3004. https://doi.org/10.3390/en11113004

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