Throughput Maximization in Multicarrier Wireless Powered Relaying Networks

Dynamic power allocation and power splitting, in a multicarrier two-hop link with a wireless powered relay, is investigated. We first formulate the corresponding optimization problem, which consists of the joint optimization -in terms of achievable rate- of, 1) the dynamic power allocation among mul...

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Bibliographic Details
Published in:IEEE wireless communications letters 2015-08, Vol.4 (4), p.385-388
Main Authors: Diamantoulakis, Panagiotis D., Ntouni, Georgia D., Pappi, Koralia N., Karagiannidis, George K., Sharif, Bayan S.
Format: Article
Language:English
Subjects:
amplify-and-forward
Complexity theory
Energy harvesting
Iterative methods
Optimization
power allocation
relay
Relays
Resource management
Wireless communication
wireless power transfer
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Summary:Dynamic power allocation and power splitting, in a multicarrier two-hop link with a wireless powered relay, is investigated. We first formulate the corresponding optimization problem, which consists of the joint optimization -in terms of achievable rate- of, 1) the dynamic power allocation among multiple channels and, 2) the selection of the power splitting ratio between information processing and energy harvesting at the relay, when amplify-and-forward is applied. This is a non-convex optimization problem, which is mapped to a convex one and optimally solved using one-dimensional search and dual decomposition, while a suboptimal efficient iterative method is also proposed. Simulations reveal a significant increase in the throughput, when comparing the proposed approach with two alternative power allocation schemes, while they verify the effectiveness of the fast-converging iterative solution.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2015.2424237