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Impact of Line-of-Sight and Unequal Spatial Correlation on Uplink MU-MIMO Systems

Tataria, Harsh LU ; Smith, Peter J ; Greenstein, Larry J. ; Dmochowski, Pawel A and Matthaiou, Michail (2017) In IEEE Wireless Communications Letters 6(5). p.634-637
Abstract
Closed-form approximations of the expected per-terminal signal-to-interference-plus-noise-ratio (SINR) and ergodic sum spectral efficiency of a multiuser multiple-input multiple-output system are presented. Our analysis assumes spatially correlated Ricean fading channels with maximum-ratio combining on the uplink. Unlike previous studies, our model accounts for the presence of unequal correlation matrices, unequal Rice factors, as well as unequal link gains to each terminal. The derived approximations lend themselves to useful insights, special cases and show the combined impact of line-of-sight (LoS) and correlated components. Numerical results show that while unequal correlation matrices enhance the system performance, the presence of... (More)
Closed-form approximations of the expected per-terminal signal-to-interference-plus-noise-ratio (SINR) and ergodic sum spectral efficiency of a multiuser multiple-input multiple-output system are presented. Our analysis assumes spatially correlated Ricean fading channels with maximum-ratio combining on the uplink. Unlike previous studies, our model accounts for the presence of unequal correlation matrices, unequal Rice factors, as well as unequal link gains to each terminal. The derived approximations lend themselves to useful insights, special cases and show the combined impact of line-of-sight (LoS) and correlated components. Numerical results show that while unequal correlation matrices enhance the system performance, the presence of strong LoS has an opposite effect. The approximations are general and remain insensitive to changes in the system dimensions, signal-to-noise-ratios, LoS levels, and correlation levels. (Less)
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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Unequal spatial correlation, Line-of-sight, Ricean fading, Maximum-ratio combining, Ergodic spectral efficiency, Massive MIMO, Statistical analysis
in
IEEE Wireless Communications Letters
volume
6
issue
5
article number
7976368
pages
4 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85023621671
ISSN
2162-2345
DOI
10.1109/LWC.2017.2726062
language
English
LU publication?
no
id
6fe704c9-9399-4d5b-bc9c-3e8a7cdb7b89
date added to LUP
2018-11-28 13:25:10
date last changed
2022-03-25 06:20:13
@article{6fe704c9-9399-4d5b-bc9c-3e8a7cdb7b89,
  abstract     = {{Closed-form approximations of the expected per-terminal signal-to-interference-plus-noise-ratio (SINR) and ergodic sum spectral efficiency of a multiuser multiple-input multiple-output system are presented. Our analysis assumes spatially correlated Ricean fading channels with maximum-ratio combining on the uplink. Unlike previous studies, our model accounts for the presence of unequal correlation matrices, unequal Rice factors, as well as unequal link gains to each terminal. The derived approximations lend themselves to useful insights, special cases and show the combined impact of line-of-sight (LoS) and correlated components. Numerical results show that while unequal correlation matrices enhance the system performance, the presence of strong LoS has an opposite effect. The approximations are general and remain insensitive to changes in the system dimensions, signal-to-noise-ratios, LoS levels, and correlation levels.}},
  author       = {{Tataria, Harsh and Smith, Peter J and Greenstein, Larry J. and Dmochowski, Pawel A and Matthaiou, Michail}},
  issn         = {{2162-2345}},
  keywords     = {{Unequal spatial correlation; Line-of-sight; Ricean fading; Maximum-ratio combining; Ergodic spectral efficiency; Massive MIMO; Statistical analysis}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{5}},
  pages        = {{634--637}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Wireless Communications Letters}},
  title        = {{Impact of Line-of-Sight and Unequal Spatial Correlation on Uplink MU-MIMO Systems}},
  url          = {{http://dx.doi.org/10.1109/LWC.2017.2726062}},
  doi          = {{10.1109/LWC.2017.2726062}},
  volume       = {{6}},
  year         = {{2017}},
}