绿色节能的分布式中继分配算法

中继协作传输不仅能在单天线情况下实现空间分集增益，而且不用提高发送功率，就能获得更大的传输速率，从而提升能效达到绿色节能的目的．协作通信的性能与中继节点分配有着密切关系，因此，如何分配中继节点成为一个研究热点．然而，现存的研究方法中大部分只关注分配节点带来的能效增益，忽略了采取协作后中继节点带来的干扰．为此，笔者综合考虑协作带来的增益与干扰，提出一种分布式中继节点分配算法(Distributed Relay Node Assignment Method，DRNAM)，从而更合理地选择中继节点，有效地提升能效．仿真实验表明，DRNAM在固定的传输功率情况下，能明显提升系统性能．

Distributed relay assignment method in green energy efficiency

Recently, cooperative communication has been regarded as one of the most promising techniques, which can achieve the spatial diversity with one antenna. In cooperative communication, the energy efficiency could be improved with the fixed transmission power. The relay node has a significant effect on the performance of cooperation. Therefore, how to allocate relay nodes becomes an important issue which should be addressed. However, existing work just focuses on the advantage cooperation gain, with the adverse effect ignored. Moreover, the advantage cooperation gain might not cover the adverse effect. To this end, we propose a Distributed Relay Node Assignment Method (DRNAM), considering both advantage and adverse effects caused by cooperation. Based on simulation results, the DRNAM can improve the energy efficiency significantly.