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.
出处
《计算机工程与设计》
CSCD
北大核心
2012年第5期1695-1699,共5页
Computer Engineering and Design
基金
国家自然科学基金项目(60672030)
广东省自然科学基金项目(10451802904006030)
高等学校博士学科点专项科研基金项目(20092125110006)
深圳信息职业技术学院自然科学基金项目(YB201010)
关键词
多天线输入输出
贪婪调度
自适应调制
自动重传
中断概率
MIMO（multi-input multi-output）
greedy scheduling
adaptive modulation
automatic repeat request
outage probability
