基于用户位置信息的导频分配方法  

Pilot Allocation Method Based on User Location Information

作　　者：吴玉成[1] 李亮[1] 马云飞 刘统[1] WU Yucheng;LI Liang;MA Yunfei;LIU Tong(School of Microelectronics and Communication Engineering,Chongqing University,Chongqing 400044,China;Chongqing Huawei Industry(Group) Co.,Ltd.,Chongqing 400712,China)

机构地区：[1]重庆大学微电子与通信工程学院,重庆400044 [2]重庆华伟工业(集团)有限责任公司,重庆400712

出　　处：《计算机工程》2020年第8期164-171,共8页Computer Engineering

基　　金：国家科技重大专项“核心电子器件、高端通用芯片及基础软件产品”(2017ZX01030204)。

摘　　要：多小区多用户大规模MIMO系统在实际应用场景中,由于大量用户被随机分配到同一扇区从而导致用户通信质量下降甚至无法进行可靠通信。为解决该问题,提出一种基于用户位置信息的导频分配方法。以用户到达基站的角度差和用户之间的距离差作为分配依据,设计一种干扰度量函数,并以此指导小区内所有用户的合理动态导频分配,从而降低扇区内的用户干扰。仿真结果表明,相对全正交与全复用的导频分配方法,该方法在天线数较少时明显提升了用户平均信干噪比,当天线数增大时,其依然具有良好的系统整体性能,且能够提高用户连接数,保证大量用户在同一扇区可以同时进行可靠通信。In the practical application of multi-cell multi-user massive MIMO systems,a large number of users are randomly allocated to the same sector,resulting in a decline in user communication quality or even a failure in reliable communication.To address the problem,this paper proposes a pilot allocation method based on user location information.The method takes the angle difference between users reaching the base station and the distance difference between users as a basis for allocation,and designs an interference metric function to reasonably guide the dynamic pilot allocation of all users in the cell,thereby reducing user interference within the sector.Simulation results show that compared with the full orthogonal and full multiplexing pilot allocation methods,the proposed method significantly improves the average Signal to Interference Noise Ratio(SINR)of users when the number of antennas is small.It can still maintain good overall system performance when the number of antennas increases.Also,it improves the number of user connections and ensures reliable simultaneous communication between a large number of users in the same sector.

关 键 词：大规模MIMO系统 导频污染 导频分配 到达角 位置信息 

分 类 号：TN929.5[电子电信—通信与信息系统]