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In this paper, we investigate an optimal power allocation algorithm for OFDM-based cognitive radio. In the model of power allocation, we set the interference constraints for each primary user, and also take subcarrier sidelobes interference (adjacent channel interference (ACI)) into account, when we use the optimal power allocation algorithm, the(More)
In this paper, we provide a new resource management algorithm with delay constraints in cognitive OFDMA Systems. Our objective is to give priority to the high real-time cognitive user in the allocation of the channel in the first scheduling slot, maximize multiple cognitive users' weighted rate sum by jointly adjusting their frequency and power resource,(More)
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