基于有限反馈的多用户MIMO系统下行调度算法研究  

Research on Downlink Scheduling in MU-MIMO Systems Based on Limited Feedback

作　　者：庞迪[1,2] 董江涛[1] 周继华 胡金龙[1] 石晶林[1,2] 

机构地区：[1]中国科学院计算技术研究所,北京100190 [2]中国科学院研究生院,北京100049 [3]重庆金美通信有限责任公司,重庆400030

出　　处：《系统仿真学报》2010年第6期1545-1550,共6页Journal of System Simulation

基　　金：北京市教育委员会共建项目专项

摘　　要：基于预编码技术的调度方案可以提高频谱效率和系统公平性,但较少考虑QoS需求的满足。提出了一种适用于有限反馈多用户MIMO系统的下行调度算法。根据预编码矩阵选择数据流,以最大化系统容量并降低同信道干扰。先后为主数据流和次数据流执行多用户调度,有效扩大了空间复用增益。仿真结果表明,该算法可以获得更高的频谱效率,并保证业务的QoS需求。Significant spetrum efficiency and system fairness can be obtained by employing scheduling schemes based on precoding techniques. However, QoS guarantee requirements are seldom taken into account. A downlink scheduling algorithm was proposed for multiple user multiple-input multiple-output （MU-MIMO） systems with limited feedback. To maximize the overall capacity and reduce co-channel interference （CCI）, streams were selected in accordance with precoding matrices. Multi-user packet scheduling was carried out for both primary streams and secondary streams, thus effectively exploiting spatial multiplexing gains. Numerical results show that, the algorithm can achieve higher spectrum efficiency, while guaranteeing QoS requirements of services.

关 键 词：数据流选择 调度 服务质量保证 多用户多输入多输出 预编码 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]