inis 18(14): e2

Research Article

Outage Performance of a Two-branch Cooperative Energy-constrained Relaying Network with Selection Combining at Destination

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  • @ARTICLE{10.4108/eai.27-6-2018.154833,
        author={Sang Quang Nguyen and Hyung Yun Kong},
        title={Outage Performance of a Two-branch Cooperative Energy-constrained Relaying Network with Selection Combining at Destination},
        journal={EAI Endorsed Transactions on Industrial Networks and Intelligent Systems},
        volume={5},
        number={14},
        publisher={EAI},
        journal_a={INIS},
        year={2018},
        month={6},
        keywords={Cooperative communication, Energy harvesting, Decode-and-forward, Power splitting, Selection combining},
        doi={10.4108/eai.27-6-2018.154833}
    }
    
  • Sang Quang Nguyen
    Hyung Yun Kong
    Year: 2018
    Outage Performance of a Two-branch Cooperative Energy-constrained Relaying Network with Selection Combining at Destination
    INIS
    EAI
    DOI: 10.4108/eai.27-6-2018.154833
Sang Quang Nguyen1,*, Hyung Yun Kong2
  • 1: Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City 700000, Vietnam
  • 2: Department of Electrical Engineering, University of Ulsan, Korea
*Contact email: nguyenquangsang3@dtu.edu.vn

Abstract

In this paper, we investigate two-branch cooperative DF relaying networks with selection combining at the destination. Two intermediate relay-clusters (a conventional relay cluster and an energy-constrained relay cluster) are utilized to aid the communication between the source and the destination. We study two cases: direct link (DR) and no direct link (NDR) between the source and the destination. In each case, we consider two relay selection schemes: best sourceâ´Çrelay channel gain (BSR) and random relay selection (RAN). Thus, we have 4 protocols: DR-BSR, DR-RAN, NDR-BSR, and NDR-RAN. For the performance evaluation, we derive a closed-form expression for the outage probability of each of the four protocols. Our analysis is substantiated via a Monte Carlo simulation. As expected, the results show that the DR case outperforms the NDR case, and the BSR scheme outperforms the RAN scheme. The outage performances of the protocols are evaluated based on the system parameters, including the transmit power, the number of relays in each cluster, the energy harvesting eÿciency, the position of the two clusters, and the target rate. The outage performance of the system is improved when the transmit power increases, the energy harvesting eÿciency increases, the distance between the two clusters and the source and destination decreases, or the target rate decreases. We found good matches between the theoretical and Monte Carlo simulation results, verifying our mathematical analysis.