中文摘要：

针对无线资源的匮乏,结合多用户分集与多用户调度技术,提出一种基于多用户调度的闭环多输入多输出跨层算法。该算法是采用跨层理论的方法,以包错误率为服务目标,利用调度技术,自适应调制,自动重传技术与MIMO技术的有机结合,提高系统的中断性能。推导了系统平均包错误率,平均传输次数与中断概率的闭合表达式,分析了天线配置,移动用户数以及重传次数对系统性能的影响;仿真结果表明,该系统的中断概率明显减小,中断性能提高。

英文摘要：

To improve wireless spectral performance,a closed-loop MIMO cross-layer algorithm based on multi-user scheduling is proposed with multi-user diversity and multi-user scheduling technology.With cross-layer theory and the target of packet error probability,the algorithm is combined with scheduling technology,adaptive modulation,automatic repeat request and MIMO to enhance the system＇s outage probability performance.The closed-form expressions are derived for average packet error rate,average transmission number and outage probability,and the effect of antenna configuration;multi-user number and retransmission number on system outage probability are analyzed.The experimental results show that system outage probability evidently is decreased,and outage performance is improved.