NETWORKING '09 Proceedings of the 8th International IFIP-TC 6 Networking Conference
Power allocation for cooperative systems with training-aided channel estimation
IEEE Transactions on Wireless Communications
Voluntary energy harvesting relays and selection in cooperative wireless networks
IEEE Transactions on Wireless Communications
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Motivated by the transmit antenna selection (TAS) concept, used in Multiple-Input-Multiple-Output systems, we argue for distributed transmit antenna selection (DTAS), which corresponds to a method of selecting a subset of available relays in cooperative diversity systems. Assuming amplify and forward relays, the proposed selection method represents a low-complexity tool for determining the optimum relaying set. Two optimization problems are studied: the error probability minimization subject to total energy consumption constraints, and the dual one, the total energy consumption minimization under error performance constraints. Numerical examples verify the advantage of the proposed method in adapting the number of relaying terminals to the desired performance-consumption tradeoff.