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Joint Power Allocation and Relay Selection in Energy Harvesting AF Relay Systems

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4 Author(s)
Imtiaz Ahmed ; Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada ; Aissa Ikhlef ; Robert Schober ; Ranjan K. Mallik

In this letter, we propose joint relay selection and power allocation schemes for maximization of the throughput of an amplify-and-forward (AF) cooperative communication system where the source and the relays are energy harvesting (EH) nodes. We formulate an offline optimization problem which can be solved optimally by the generalized Bender's decomposition. For real-time implementation with low computational complexity, we propose two suboptimal online power allocation schemes. The performance of the proposed schemes is evaluated via simulations.

Published in:

IEEE Wireless Communications Letters  (Volume:2 ,  Issue: 2 )