摘要
近年来提出的协作分集技术通过使网络中各单天线用户共享彼此天线以形成虚拟多天线阵列,从而可以显著提高网络容量,也使得其备受科研工作者的关注。提出了基于解码重传(DaF)下的被动式最佳协作中继选择准则,该准则是通过推导协作中继传输系统的误符号率而得出的。在总功率限制下,可以证明基于解码重传下的机会中继在中断性能上考虑是最佳的,更确切地说,它的中断性能和利用全部候选中继传输的最佳解码重传策略是一样的。
Cooperative diversity technique proposed in recent years can form the and enlarge the network capacity enormously by sharing the different users' network, which has been investigated widely by researchers. A reactive virtual multiple antenna array antennas in a signal antenna of the cooperative transmission system. It is shown that opportunistic DaF relaying is outage-optimal under an aggregate power constraint, that is, it is equivalent in outage behavior to the optimal DaF strategy that employs all potential relays.
出处
《信息技术》
2010年第2期65-67,共3页
Information Technology
关键词
协作分集
机会中继
中断概率
分集增益
cooperative diversity
opportunity relay
outage probability
diversity gains