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    Energy-Efficient Power Allocation for Fixed-Gain Amplify-and-Forward Relay Networks with Partial Channel State Information

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    Energy-Efficient Power Allocation for Fixed-Gain.pdf
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    Type
    Technical Report
    Authors
    Zafar, Ammar cc
    Alouini, Mohamed-Slim cc
    Chen, Yunfei
    Radaydeh, Redha M.
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2012-06
    Permanent link to this record
    http://hdl.handle.net/10754/230312
    
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    Abstract
    In this report, energy-efficient transmission and power allocation for fixed-gain amplify-and-forward relay networks with partial channel state information (CSI) are studied. In the energy-efficiency problem, the total power consumed is minimized while keeping the signal-to-noise-ratio (SNR) above a certain threshold. In the dual problem of power allocation, the end-to-end SNR is maximized under individual and global power constraints. Closed-form expressions for the optimal source and relay powers and the Lagrangian multiplier are obtained. Numerical results show that the optimal power allocation with partial CSI provides comparable performance as optimal power allocation with full CSI at low SNR.
    Publisher
    King Abdullah University of Science and Technology
    Collections
    Physical Science and Engineering (PSE) Division; Technical Reports

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