Bit loading algorithms for cooperative OFDM systems
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
A Low Complexity Subcarrier Pairing Scheme for OFDM Based Multiple AF Relay Systems
ICCIT '08 Proceedings of the 2008 Third International Conference on Convergence and Hybrid Information Technology - Volume 01
Transmit power adaptation for multiuser OFDM systems
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
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The performance of subcarrier coupling and its effects on different scheduling schemes in multi-user OFDMA relaying networks are investigated in this paper. The relay station adopts the amplify-and-forward (AF) relaying strategy and is allowed to couple an input subcarrier to another output subcarrier. We show that in a source-relay-destination model, subcarrier coupling can achieve substantial capacity gain only when the two hop links have similar channel qualities, and the achievable gain also depends on the slow-fading magnitude of either hop. In view of this, we employ a sub-optimal subcarrier coupling scheme with low complexity for the multi-user scenario. Simulation results demonstrate that the sub-optimal scheme achieve similar performance compared to the conventionally optimal scheme.