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

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 e...

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Bibliographic Details
Published in:IEEE wireless communications letters Vol. 8; no. 3; pp. 885 - 888
Main Authors: Ali, Anum, Carvalho, Elisabeth De, Heath, Robert W.
Format: Journal Article
Language:English
Published: Piscataway IEEE 01.06.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Beamforming
Channel models
Channels
Computer simulation
Covariance matrices
Interference
linear precoders
Linear receivers
massive MIMO
MIMO (control systems)
MIMO communication
Non-stationary channel analysis
Receiving antennas
Signal to noise ratio
Visibility
ISSN:2162-2337, 2162-2345
Online Access:Get full text
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Summary: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.
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ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2019.2898572