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

Institute of Electrical and Electronics Engineers
Publication Type:
Journal Article
IEEE Wireless Communications Letters, 2012, 1 (6), pp. 553 - 556
Issue Date:
Full metadata record
Files in This Item:
Filename Description Size
06261329.pdfPublished Version142.01 kB
Adobe PDF
In this letter, 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.
Please use this identifier to cite or link to this item: