Resource allocation with opportunistic feedback in Cooperative MU-OFDM network

In this paper we present two strategy to maximize user's throughput in Cooperative MU-OFDM network while considering fairness of users. Our strategy is proposed to improve throughput and fairness of users only with limited feedback. With perfect instantaneous channel state information(CSI) at receiver, the resource allocating strategy not only decided in base station, but also decided in users of the cell. Further, we decompose the joint resource allocation problem into three subproblems. First, a proportional user choosing strategy is introduced. Second, an adaptive relay choosing strategy is proposed in each user respectively. Finally, a suboptimal power allocation is given after subcarrier allocation. Based on the three step, we proposed two allocating strategy. The simulation results demonstrate that our strategy can greatly improves the throughput while ensuring users fairness only with limited feedback.