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This paper considers the problem of noncooperative resource allocation in orthogonal frequency division multiple access (OFDMA) systems. In order to maximize the energy efficiency, a distributed and iterative algorithm that the energy efficiency changed dynamically according to the strategies is proposed. In the proposed game, we study the subcarrier and transmit power allocation and each user chooses...
We consider the relay-eavesdropper channel with generalized feedback at the source node. In the presence of a wire-tapper, the source can send confidential messages to an intended receiver with the help of the trusted relay. With a generalized feedback from the relay to the source node, the cooperation between the source node and relay node may be enhanced. The achievable secrecy rate region for this...
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