Efficient power allocation for fixed-gain amplify-and-forward relaying in rayleigh fading

Ammar Zafar, Redha Mahmoud Radaydeh, Yunfei Chen, Mohamed-Slim Alouini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


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) optimal power allocation to maximize the end-to-end signal-to-noise ratio (SNR) and 2) minimizing the total consumed power while maintaining the end-to-end SNR over a threshold value. We assume that the relays have knowledge of only the channel statistics of all the links. We show that the SNR maximization problem is concave and the power minimization problem is convex. Hence, we solve the problems through convex programming. Numerical results show the benefit of allocating power optimally rather than uniformly. © 2013 IEEE.
Original languageEnglish (US)
Title of host publication2013 IEEE International Conference on Communications Workshops (ICC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages5
ISBN (Print)9781467357531
StatePublished - Jun 2013

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01


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