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Performance and Analysis of Downlink Multiuser MIMO Systems With Regularized Zero-Forcing Precoding in Ricean Fading Channels

Tataria, Harsh LU ; Smith, Peter J; Greenstein, Larry J.; Dmochowski, Pawel A and Shafi, Mansoor (2016) IEEE International Conference on Communications, 2016
Abstract
Analytical expressions to approximate the expected per-user signal-to-interference-plus-noise-ratio (SINR) and ergodic sum-rate of a multiuser multiple-input-multiple-output system are presented. Our analysis assumes uncorrelated Ricean fading channels with regularized zero-forcing precoding on the downlink. The derived expressions are averaged with respect to the previously unknown arbitrary eigenvalue densities of the complex non-central Wishart distributed channel correlation matrix. To aid the derivation of the expected SINR, we derive analytical expressions for the joint density of two arbitrary eigenvalues of the complex non-central Wishart matrix. Unlike previous studies, our model caters to the presence of a unique Rice factor for... (More)
Analytical expressions to approximate the expected per-user signal-to-interference-plus-noise-ratio (SINR) and ergodic sum-rate of a multiuser multiple-input-multiple-output system are presented. Our analysis assumes uncorrelated Ricean fading channels with regularized zero-forcing precoding on the downlink. The derived expressions are averaged with respect to the previously unknown arbitrary eigenvalue densities of the complex non-central Wishart distributed channel correlation matrix. To aid the derivation of the expected SINR, we derive analytical expressions for the joint density of two arbitrary eigenvalues of the complex non-central Wishart matrix. Unlike previous studies, our model caters to the presence of a unique Rice factor for each user terminal, making it suitable for analysis of modern systems, such as small cells and millimeter-wave. Our findings suggest that while the presence of strong line-of-sight has an adverse effect on the expected SINR and ergodic sum-rates, increasing the variability of Rice factors enhances the peak rate performance of the system. Our analysis can be applied to arbitrary system dimensions and is seen to remain tight across the signal-to-noise-ratio range considered. (Less)
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author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Ricean fading, Wishart matrix theory, Multiuser systems, MIMO systems
host publication
2016 IEEE International Conference on Communications (ICC)
pages
7 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Conference on Communications, 2016
conference location
Kuala Lumpur, Malaysia
conference dates
2016-05-23 - 2016-05-27
external identifiers
  • scopus:84981350326
ISBN
978-1-4799-6664-6
978-1-4799-6665-3
DOI
10.1109/ICC.2016.7510850
language
English
LU publication?
no
id
eae691fd-6643-407c-9ec0-0f2d913618c3
date added to LUP
2018-11-28 13:54:15
date last changed
2019-05-21 04:15:52
@inproceedings{eae691fd-6643-407c-9ec0-0f2d913618c3,
  abstract     = {Analytical expressions to approximate the expected per-user signal-to-interference-plus-noise-ratio (SINR) and ergodic sum-rate of a multiuser multiple-input-multiple-output system are presented. Our analysis assumes uncorrelated Ricean fading channels with regularized zero-forcing precoding on the downlink. The derived expressions are averaged with respect to the previously unknown arbitrary eigenvalue densities of the complex non-central Wishart distributed channel correlation matrix. To aid the derivation of the expected SINR, we derive analytical expressions for the joint density of two arbitrary eigenvalues of the complex non-central Wishart matrix. Unlike previous studies, our model caters to the presence of a unique Rice factor for each user terminal, making it suitable for analysis of modern systems, such as small cells and millimeter-wave. Our findings suggest that while the presence of strong line-of-sight has an adverse effect on the expected SINR and ergodic sum-rates, increasing the variability of Rice factors enhances the peak rate performance of the system. Our analysis can be applied to arbitrary system dimensions and is seen to remain tight across the signal-to-noise-ratio range considered.},
  author       = {Tataria, Harsh and Smith, Peter J and Greenstein, Larry J. and Dmochowski, Pawel A and Shafi, Mansoor},
  isbn         = {978-1-4799-6664-6 },
  keyword      = {Ricean fading,Wishart matrix theory,Multiuser systems,MIMO systems},
  language     = {eng},
  location     = {Kuala Lumpur, Malaysia},
  month        = {05},
  pages        = {7},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Performance and Analysis of Downlink Multiuser MIMO Systems With Regularized Zero-Forcing Precoding in Ricean Fading Channels},
  url          = {http://dx.doi.org/10.1109/ICC.2016.7510850},
  year         = {2016},
}