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

机译:非线性失真下多用户MIMO系统的性能改进

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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.
机译:在存在非线性失真的情况下,多用户多输入多输出(MU-MIMO)系统的性能下降变得很明显。性能损失不仅来自带内非线性失真,还归因于非线性失真导致的多用户干扰(MUI)消除不完全。在这方面,我们分析了MU-MIMO系统中非线性失真的特征。数值结果表明,即使很小的非线性失真也会严重降低MU-MIMO系统的性能。为了提高系统性能,提出了一种非线性最小均方误差(NMMSE)检测算法。所提出的检测算法以较低的附加成本提高了系统性能。 (C)2018 Elsevier B.V.保留所有权利。

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