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

abstract

• 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.

authors

• Radaydeh, Redha

published proceedings

• IEEE WIRELESS COMMUNICATIONS LETTERS

author list (cited authors)

• Zafar, A., Radaydeh, R. M., Chen, Y., & Alouini, M.

citation count

• 21

complete list of authors

• Zafar, Ammar||Radaydeh, Redha M||Chen, Yunfei||Alouini, Mohamed-Slim

publication date

• December 2012

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

keywords

• Amplify-and-forward
• Cooperative Communications
• Energy-efficiency
• Fixed-gain Relays
• Optimal Power Allocation

Digital Object Identifier (DOI)

• 10.1109/WCL.2012.080112.120318

start page

• 553

end page

• 556

volume

• 1

issue

• 6

URL

• http://dx.doi.org/10.1109/wcl.2012.080112.120318

user-defined tag

• 7 Affordable and Clean Energy