Linear Receivers in Non-Stationary Massive MIMO Channels With Visibility Regions

被引：54
|
作者：
Ali, Anum [1 ]
de Carvalho, Elisabeth [2 ]
Heath, Robert W., Jr. [1 ]
机构：
[1] Univ Texas Austin, Wireless Networking & Commun Grp, Austin, TX 78712 USA
[2] Aalborg Univ, Dept Elect Syst, DK-9400 Aalborg, Denmark
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2019年 / 8卷 / 03期
基金：
美国国家科学基金会; 欧盟地平线“2020”;
关键词：
Non-stationary channel analysis; linear precoders; massive MIMO;
D O I：
10.1109/LWC.2019.2898572
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
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 multiuser configurations of the VRs and compare the performance of both stationary and non-stationary channels through analysis and numerical simulations.
引用
收藏
页码：885 / 888
页数：4
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