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    Power Allocation Strategies for Fixed-Gain Half-Duplex Amplify-and-Forward Relaying in Nakagami-m Fading

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    Power Allocation Strategies for Fixed-Gain Half-Duplex Amplify-and-Forward Relaying in Nakagami-m Fading.pdf
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    Type
    Article
    Authors
    Zafar, Ammar cc
    Radaydeh, Redha M.
    Chen, Yunfei
    Alouini, Mohamed-Slim cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering
    Electrical Engineering Program
    Date
    2014-01
    Preprint Posting Date
    2012-11-26
    Permanent link to this record
    http://hdl.handle.net/10754/300621
    
    Metadata
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    Abstract
    In this paper, we study power allocation strategies for a fixed-gain amplify-and-forward relay network employing multiple relays. We consider two optimization problems for the relay network: 1) maximizing the end-to-end signal-to-noise ratio (SNR) and 2) minimizing the total power consumption while maintaining the end-to-end SNR over a threshold value. We investigate these two problems for two relaying protocols of all-participate (AP) relaying and selective relaying and two cases of feedback to the relays, namely full and limited. We show that the SNR maximization problem is concave and that the power minimization problem is convex for all protocols and feedback cases considered. We obtain closed-form expressions for the two problems in the case of full feedback and solve the problems through convex programming for limited feedback. Numerical results show the benefit of having full feedback at the relays for both optimization problems. However, they also show that feedback overhead can be reduced by having only limited feedback to the relays with only a small degradation in performance.
    Description
    Extended version of the article submitted to IEEE TWireless
    Citation
    Zafar, A., Radaydeh, R. M., Chen, Y., & Alouini, M.-S. (2014). Power Allocation Strategies for Fixed-Gain Half-Duplex Amplify-and-Forward Relaying in Nakagami-m Fading. IEEE Transactions on Wireless Communications, 13(1), 159–173. doi:10.1109/twc.2013.120113.121944
    Sponsors
    This work was funded by King Abdulaziz City of Science and Technology (KACST).
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    IEEE Transactions on Wireless Communications
    DOI
    10.1109/TWC.2013.120113.121944
    arXiv
    1211.5931
    Additional Links
    https://ieeexplore.ieee.org/document/6678680/
    https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6678680
    ae974a485f413a2113503eed53cd6c53
    10.1109/TWC.2013.120113.121944
    Scopus Count
    Collections
    Articles; Articles; Electrical Engineering Program; Electrical Engineering Program; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

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