摘要
大量的研究结果证明,无线网络中一个或者多个中继节点具有协助传输信息的优点。在实际情况中,参与协作的每个用户均要决定协作时序及协作对象。为此,提出一种传输速率只降低一半,而分集指数可达到满分集的协议。在分布式网络中,每个节点根据接收信号的即时信噪比独立决定所协助的用户对象,并在协作时隙内将功率平均分配给被协助对象。由于协作时隙采用平分功率协作,无论参与协作的用户数目如何变化,网络的数据速率都只降低为不协作情况的1/2。
Various research results have demonstrated the advantages of one or several relay nodes assisting transmissions in a wireless network. In many practical scenarios, the users participating in the cooperation must decide the cooperation schedule and cooperating object. In this paper, a new cooperative protocol is proposed whose data rate only drops to 1/2 SPCU, and can get full diversity order. In the distributed network, each node decides its cooperating objects independently according to the instantaneous received SNR, and shares its power to the cooperating objects equally. Because of the equality power sharing, the data rata only drops to 1/2 SPCU whatever the number of cooperating user is.
出处
《电讯技术》
2008年第2期46-51,共6页
Telecommunication Engineering
基金
国家高技术研究发展863计划资助项目(2005AA123910)
陕西省自然科学基金资助项目(2006F41)
关键词
无线网络
协作分集
掉线概率
随机选择
平分功率
wireless network
cooperative diversity
outage probability
random selective
equality power sharing
