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中文摘要：
分析了基于用户频谱效率的中继选择算法的不足，基于最大流最小割定理，给出了系统容量最优化问题模型，分析了两跳中继网络接入链路和中继链路对系统容量的不同影响。基于链路权重因子，提出一种基于系统容量最大化的中继选择算法。对不同中继选择算法下的系统容量差异的理论与仿真分析结果表明，提出的系统容量最大化中继选择算法可以获得更优的系统容量性能，并对网络拓扑和节点个数具有良好的鲁棒性。
英文摘要：
The disadvantages of the relay selection algorithms based on user frequency efficiency are analyzed. Based on the max-flow min-cut theorem, an optimization model for maximizing system capacity is provided, and the influences of the access link and relay link of the two-hop relaying network on system capacity are analyzed. On the basis of these, a max- imum system capacity based relay selection scheme for wireless relay networks is proposed in terms of the link weight factor. The detailed theoretical analysis and simulation results show that the proposed relay selection algorithm can improve system＇ s capacity performance greatly and has well robustness to the network topology and the number of nodes.
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