| MU-MIMO系统下行链路中的自适应用户调度算法 |
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| 引用本文： | 宋亚南.MU-MIMO系统下行链路中的自适应用户调度算法[J].电视技术,2014,38(19). |
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| 作者姓名： | 宋亚南 |
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| 作者单位： | 1. 南京邮电大学通信与信息工程学院,江苏南京,210003
2. 南京邮电大学通信与信息工程学院,江苏南京 210003;南京邮电大学江苏省无线通信重点实验室,江苏南京 210003 |
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| 摘 要： | 在多用户MIMO系统下行链路中,经典的半正交用户调度算法(SUS)难以控制备选用户的门限参数值,且该算法没有考虑QOS对时延的要求。为此,提出一种自适应用户调度算法(AUS),在其调度过程中根据备选用户数及基站端天线数动态改变门限参数值,同时将用户最大时延限制作为用户选择准则的权重。仿真结果表明,与其他算法比,该算法提高了系统吞吐率,在加权用户选择准则时最大可减少24%的平均时延。
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| 关 键 词： | MU-MIMO 用户调度 门限 时延 自适应 |
| 收稿时间： | 2014/5/19 0:00:00 |
| 修稿时间： | 7/8/2014 12:00:00 AM |
Adaptive User Scheduling Algorithm for downlinkof Multiuser MIMO System |
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| SONG Ya-nan.Adaptive User Scheduling Algorithm for downlinkof Multiuser MIMO System[J].Tv Engineering,2014,38(19). |
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| Authors: | SONG Ya-nan |
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| Affiliation: | College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications |
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| Abstract: | In the downlink of MU-MIMO system, the classic semi-orthogonal user scheduling (SUS) algorithm is difficult to choose the candidate user group threshold parameter values, and the algorithm does not take the delay requirements of QoS into consideration. This paper proposes an adaptive user scheduling algorithm (AUS), dynamically choosing the threshold value based on the number of candidate users and antennas of base station,meanwhile considering the maximum permissible delay as the weight of user selection criteria. Simulation results show that the algorithm enhances the system throughput, and can reduce the average delay by 24%, compared with the SUS algorithm. |
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| Keywords: | MU-MIMO user scheduling threshold delay adaptive |
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