Linear Receivers in Non-Stationary Massive MIMO Channels With Visibility Regions
Linear Receivers in Non-Stationary Massive MIMO Channels With Visibility Regions
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DOI：
10.1109/lwc.2019.2898572
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发表时间：
2018-10
影响因子：
6.3
通讯作者：
Anum Ali;E. Carvalho;R. Heath
中科院分区：
文献类型：
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作者：
Anum Ali;E. Carvalho;R. Heath
在具有大型阵列的大规模MIMO系统中，信道在空间上变得非平稳。我们研究了以可见区(VR)为特征的空间非平稳性的影响，其中信道能量在阵列的一部分上是重要的。基于基于VRS的信道模型，给出了共轭波束形成(CB)和迫零(ZF)预编码器的信干噪比(SINR)的表达式。我们还给出了ZF预编码码信干噪比的近似确定性等价。通过分析和数值仿真，确定了VRS的有利和不利的多用户配置，并比较了平稳和非平稳信道的性能。
In a massive MIMO system with large arrays, the channel becomes spatially non-stationary. We study the impact of spatial non-stationarity characterized by visibility regions (VRs) where the channel energy is significant on a portion of the array. Relying on a channel model based on VRs, we provide expressions of the signal-to-interference-plus-noise ratio (SINR) of conjugate beamforming (CB) and zero-forcing (ZF) precoders. We also provide an approximate deterministic equivalent of the SINR of ZF precoders. We identify favorable and unfavorable multi-user configurations of the VRs and compare the performance of both stationary and non-stationary channels through analysis and numerical simulations.