基于协作通信的最佳中继选择方案

协作通信中的机会中继是一种基于即时信道状态选择的中继选择算法，可以获得与传统协作分集技术相同的分集增益，而不需要使用复杂的空时编码技术。但是多个节点同时竞争最佳中继时，可能出现冲突而导致选择失败。提出一种新的方案，通过引入候选节点限制策略以及控制信道对算法进行改进，仿真表明，该算法特别适用于候选中继较多的情况，可以在实现快速选择节点的同时降低选择失败概率。

A Best Relay Selection Scheme Based on Cooperative Communication

Opportunistic relaying uses a single relay with best channel quality for cooperative diversity, achieves the same diversity gain as that achieved by more complex space-time coding. However, the failure probability of the best relay selection may become unacceptable when the number of relays increases. Thus a modified practical best relay selection scheme is proposed by using threshold level to restrict the numbers of contending relays and using control channel in opportunistic relay communications. Simulati...