基于多用户调度的闭环MIMO系统中断性能分析

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.%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.