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In this paper, we present a study on the spectrum sharing matter in orthogonal frequency division multiple access (OFDMA) systems under heterogeneous constraints leading to a joint time-frequency resource allocation model. To take advantage of the flexibility of the OFDMA-based resource allocation scheme, we analytically study the spectrum sharing matter by deriving an optimization problem that takes...
In this paper, we study the resource allocation problem in orthogonal frequency division multiple access (OFDMA) systems. An analytical approach based on an optimization problem formulation for the time-frequency spectrum allocation matter is proposed. The optimization problem takes into consideration heterogeneous constraints belonging to two different layers, leading to a cross-layer approach. The...
In this paper, we investigate a dynamic sub-band allocation for spectrum sharing in the multiuser OFDM-UWB systems while respecting the system constraints and the distributed MAC architecture. The contribution of this work is twofold: first we propose a dynamic spectrum allocation scheme based on an analytical study by deriving a multiuser optimization problem to find the optimal allocation solution...
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