Energy-efficient power allocation for fixed-gain amplify-and-forward relay networks with partial channel state information

Zafar, A; Radaydeh, RM; Chen, Y; Alouini, MS

Energy-efficient power allocation for fixed-gain amplify-and-forward relay networks with partial channel state information

Zafar, A

Radaydeh, RM Chen, Y Alouini, MS

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Publication Type:: Journal Article
Citation:: IEEE Wireless Communications Letters, 2012, 1 (6), pp. 553 - 556
Issue Date:: 2012-08-15

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Field	Value	Language
dc.contributor.author	Zafar, A https://orcid.org/0000-0001-8382-7625	en_US
dc.contributor.author	Radaydeh, RM	en_US
dc.contributor.author	Chen, Y	en_US
dc.contributor.author	Alouini, MS	en_US
dc.date.issued	2012-08-15	en_US
dc.identifier.citation	IEEE Wireless Communications Letters, 2012, 1 (6), pp. 553 - 556	en_US
dc.identifier.issn	2162-2337	en_US
dc.identifier.uri	http://hdl.handle.net/10453/114038
dc.description.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. © 2012 IEEE.	en_US
dc.relation.ispartof	IEEE Wireless Communications Letters	en_US
dc.relation.isbasedon	10.1109/WCL.2012.080112.120318	en_US
dc.title	Energy-efficient power allocation for fixed-gain amplify-and-forward relay networks with partial channel state information	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	1	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	0805 Distributed Computing	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CRIN - Realtime Information Networks
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	1	en_US

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. © 2012 IEEE.

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