LTE系统中基于估计波束到达角的多用户调度算法  

Multiuser scheduling scheme based on estimated angle-of-arrival in LTE systems

作　　者：彭张节[1] 洪赟 许威[1] 赵春明[1] 

机构地区：[1]东南大学移动通信国家重点实验室,南京210096 [2]联发通讯科技(苏州)有限公司,苏州215021

出　　处：《东南大学学报（自然科学版）》2013年第3期458-462,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61101087);高等学校博士学科点专项科研基金资助项目(20110092120011);东南大学移动通信国家重点实验室自主研究经费资助项目(2013A05)

摘　　要：根据3GPP TR 25.996中描述的空间信道模型(SCM),提出了波束到达角估计算法和基于波束到达角的多用户调度算法.针对具有明显来波方向的无线通信系统,基站首先根据上行信道信息估计出每个用户的波束到达角,然后根据用户无线信道到达角将多用户进行分组,从每个分组中选择信道质量最好的用户,以实现多用户分集增益.相对于传统的波束到达角估计算法,该估计算法具有较低的复杂度.与基于信道容量的用户调度算法相比,该调度算法能够明显降低运算量,在系统中更容易实现.仿真结果表明,该调度算法可以在有效降低系统计算复杂度和反馈信息量的前提下,获得与传统方案相近的多用户调度性能增益,同时还能获得较好的公平性.An estimated algorithm for angle-of-arrival and an estimated angle-of-arrival based multiuser scheduling scheme are presented according to the spatial channel model（SCM） in 3GPP TR 25.996.As for wireless communication systems with obvious direction-of-arrival（DOA）,the base station first estimates the angle-of-arrival of each user according to the uplink channel state information,and then groups multiuser by the angle-of-arrival of users＇ wireless channel and selects the users with the best channel quality.The scheme can accomplish the multiuser diversity gain by packet scheduling.Compared with the traditional direction-of-arrival（DOA） estimation algorithm,the proposed algorithm can has lower complexity.Compared with the scheduling scheme based on channel capacity,the proposed scheme can significantly reduce the amount of computation and be easily realized in system.The simulation results demonstrate that the proposed scheduling scheme can achieve a multiuser scheduling gain approximate to the gain of traditional scheme and obtain the fairness for each user under the condition of effectively reducing the computational complexity as well as feedback information.

关 键 词：空间信道模型(SCM) 波束到达角 用户相关性 算法复杂度 

分 类 号：TN929.5[电子电信—通信与信息系统]