IEEE Transactions on Wireless Communications
Opportunistic beamforming using dumb antennas
IEEE Transactions on Information Theory
Hard Fairness Versus Proportional Fairness in Wireless Communications: The Single-Cell Case
IEEE Transactions on Information Theory
A tutorial on decomposition methods for network utility maximization
IEEE Journal on Selected Areas in Communications
Resource Allocation for OFDMA Relay Networks With Fairness Constraints
IEEE Journal on Selected Areas in Communications
Joint optimization of relay strategies and resource allocations in cooperative cellular networks
IEEE Journal on Selected Areas in Communications
Relay selection and power allocation in cooperative cellular networks
IEEE Transactions on Wireless Communications
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In this paper, we consider distributive subband, power and rate allocation for a two-hop downlink transmission in an orthogonal frequency-division multiple-access (OFDMA) cellular system with fixed relays which operate in decode-and-forward strategy. We take into account of the penalty of packet errors due to imperfect CSIT and system fairness by considering weighted sum goodput as our optimization objective. Based on the cluster-based architecture, we obtain a fast-converging distributive solution with only local imperfect CSIT by using decomposition of the optimization problem. To further reduce the signaling overhead and computational complexity, we propose a reduced feedback distributive solution, which can achieve asymptotically optimal performance for large number of users with arbitrarily small feedback overhead per user. We also derive asymptotic average system throughput so as to obtain useful design insights.