牛戈,贾元启,穆晓敏,张健康

• 1:郑州大学信息工程学院

摘要(Abstract)：

针对大规模多小区MIMO系统中导频污染是限制系统性能的主要瓶颈,提出一种基于导频分配策略降低导频污染的方法。小区内用户分配相同的导频序列,相邻小区用户分配正交的导频序列,而小区内存在的导频污染,利用下行、上行训练的方法消除。在下行训练阶段,基站给目标用户发送导频序列,使目标用户获得特殊的预失真导频序列。在上行训练阶段,基站同时接收小区内所有用户的导频序列,并消除导频污染。通过仿真分析,该方法可以完全消除导频污染的影响,获得较好的系统性能,提高系统吞吐量。更为重要的是,该方法与许多其他消除导频污染的算法相比,能避免每个基站在估计信道状态信息时已知其二阶统计信息的假设。

关键词(KeyWords)： 大规模MIMO;导频污染;信道估计;时分双工系统;导频序列;吞吐量

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(61271421);国家自然科学基金(61571401);; 东南大学移动通信国家重点实验室开放研究基金资助课题(2016D02);; 河南省科技攻关计划项目(152102310067)~~

作者(Author): 牛戈,贾元启,穆晓敏,张健康

DOI: 10.16652/j.issn.1004-373x.2018.13.005

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