Date Added: Mar 2010
In this paper, the authors propose a new adaptive subcarrier allocation for a multiuser two-way OFDMA relay network. In the proposed algorithm, subcarriers are allocated to the user-pairs and relays to maximize the achievable sum-rate over all user-pairs while satisfying the minimum rate requirement for each user-pair. Simulation results show that the proposed algorithm improves spectral efficiency and fairness. Diversity techniques are widely studied to mitigate the performance degradation caused by multipath fading in wireless networks.