| 有限反馈多用户MIMO系统的低复杂度用户选择 |
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| 引用本文： | 万磊,郑幽思,梅顺良.有限反馈多用户MIMO系统的低复杂度用户选择[J].清华大学学报(自然科学版),2010(4). |
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| 作者姓名： | 万磊 郑幽思 梅顺良 |
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| 作者单位： | 清华大学电子工程系; |
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| 摘 要： | 为了降低有限反馈多用户MIMO系统中的用户选择算法的复杂度,使系统支持更多的用户,基于贪婪用户选择算法(GUS),提出了一种低复杂度用户选择算法。该算法将Schmidt正交化的思想引入GUS算法,通过计算相互正交的预编码向量来构成预编码矩阵,并估计信道容量,最后寻找最佳的用户组合进行下行数据的传输。该低复杂度算法利用预编码向量的正交性避免了矩阵求伪逆的过程,从而极大地降低了计算量。仿真结果表明,在相同反馈方式下,改进后的算法仍能取得和GUS近乎相同的系统总容量。
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| 关 键 词： | 多用户MIMO系统 用户选择 正交化 低复杂度 |
Low complexity user selection scheme for limited feedback MU-MIMO systems |
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| WANLei,ZHENGYousi,MEIShunliang.Low complexity user selection scheme for limited feedback MU-MIMO systems[J].Journal of Tsinghua University(Science and Technology),2010(4). |
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| Authors: | WANLei ZHENGYousi MEIShunliang |
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| Institution: | WAN+Lei,ZHENG+Yousi,MEI+Shunliang(Department+of+Electronic+Engineering,Tsinghua+University,Beijing+100084,China) |
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| Abstract: | This paper presents a low complexity user selection scheme based on the Greedy user selection (GUS) to reduce the user selection algorithm complexity for limited feedback multi-user MIMO (MU-MIMO) systems and to increase the active user number. The developed algorithm uses Schmidt orthogonalization in the GUS scheme. The orthogonal precoding weighting vector is first predicted,with the sum rate then estimated based on the precoding weighting vector prediction. Finally,users are selected in group to maximize... |
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| Keywords: | multi-user MIMO (MU-MIMO) user selection orthogonalization low complexity |
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