Performance improvement of multi-user MIMO system in the presence of nonlinear distortion

被引：2
|
作者：
Fang, Zhou [1 ,2 ]
Kang, Kai [2 ]
Luo, Xiliang [3 ]
Qian, Hua [2 ,3 ]
机构：
[1] Shanghai Univ, Sch Commun & Informat Engn, Shanghai 200444, Peoples R China
[2] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
[3] Shanghaitech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China
来源：
PHYSICAL COMMUNICATION | 2018年 / 31卷
基金：
中国国家自然科学基金;
关键词：
MU-MIMO; Nonlinear distortion; MMSE detection; Precoding; Multiuser interference (MUI); POWER-AMPLIFIER; CANCELLATION;
D O I：
10.1016/j.phycom.2018.09.005
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In the presence of nonlinear distortion, the performance degradation of multiuser multiple-input multiple-output (MU-MIMO) systems becomes significant. The performance loss comes not only from the in-band nonlinear distortion, but also from the imperfect cancellation of multiuser interference (MUI) due to the nonlinear distortion. In this regard, we analyze characteristics of nonlinear distortion in an MU-MIMO system. Numerical results show that even tiny nonlinear distortion severely degrades the performance of MU-MIMO system. A nonlinear minimum mean square error (NMMSE) detection algorithm is proposed to improve the system performance. The proposed detection algorithm improves the system performance at low additional cost. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：21 / 27
页数：7
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