双向中继系统的联合中继选择和功率分配策略

摘要

In order to improve the sum-rate of two-way relay system,this paper proposes a joint relay selection and power allocation strategy based on in network coding two-way relay system model.A relay selection scheme of Maximized Minimum Channel Gain (MMCG) and Maximize Harmonic Average(MHA) is proposed.The optimal power allocation scheme between the sources and the relay in two-way relay system is proposed based on maximizing the sum rate of the system.Simulation results show that the proposed joint MMCG relay selection and the optimal allocation strategy can effectively improve 1.6 bit/s/Hz on the sum rate of system in two-way relay system with Physical-layer Network Coding(PNC) than joint BRS relay selection strategy.%为提高双向中继系统的可达速率和,基于网络编码的双向中继系统模型,提出一种最大化可达速率和的联合中继选择与功率分配策略.给出最大化最小信道增益(MMCG)和最大化信道增益调和平均值的中继选择方案.在中继选择策略的基础上,给出一种基于双向中继系统可达速率和最大化准则的最优功率分配方案.仿真结果表明,与联合BRS中继选择功率分配方案相比,联合MMCG中继选择和最优功率分配方案系统可达速率约提高1.6 bit/s/Hz.