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In this paper, the authors investigate a decentralized Power Allocation (PA) algorithm, i.e., without the need of a fusion center, for a coalition of Bit-Interleaved Coded (BIC) OFDM-based Cognitive Radio (CR) devices. Taking advantages of a game theoretical description for their problem, it is shown that the reliability of the secondary cooperative link can be remarkably improved through a simple average consensus algorithm keeping the interference produced to the Primary Users (PUs) under a prescribed threshold. Finally, the performance gain of the proposed PA policy is highlighted comparing it with conventional power allocation algorithms.
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