Advanced

Zero-Forcing Precoding Performance in Multiuser MIMO Systems With Heterogeneous Ricean Fading

Tataria, Harsh LU ; Smith, Peter J; Greenstein, Larry J. and Dmochowski, Pawel A (2017) In IEEE Wireless Communications Letters 6(1). p.74-77
Abstract
An accurate approximation is developed for the distribution of the instantaneous per-terminal signal-to-noise-ratio (SNR) of a downlink multiuser multiple-input multiple-output system with zero-forcing (ZF) precoding. Our analysis assumes a Ricean fading environment, where we show that the SNR at a given terminal is well approximated by the gamma distribution and we derive its parameters. The analysis relies on densities of an arbitrary eigenvalue and a pair of arbitrary eigenvalues of the uncorrelated complex non-standard, noncentral Wishart matrices. Unlike previous studies, we consider microwave and millimeter-wave channel parameters with a unique Rice factor for each terminal. We demonstrate that stronger line-of-sight adversely... (More)
An accurate approximation is developed for the distribution of the instantaneous per-terminal signal-to-noise-ratio (SNR) of a downlink multiuser multiple-input multiple-output system with zero-forcing (ZF) precoding. Our analysis assumes a Ricean fading environment, where we show that the SNR at a given terminal is well approximated by the gamma distribution and we derive its parameters. The analysis relies on densities of an arbitrary eigenvalue and a pair of arbitrary eigenvalues of the uncorrelated complex non-standard, noncentral Wishart matrices. Unlike previous studies, we consider microwave and millimeter-wave channel parameters with a unique Rice factor for each terminal. We demonstrate that stronger line-of-sight adversely impacts the ZF SNR, while increasing the Rice factor variability results in higher peak ZF SNR. Our approximations are insensitive to changes in the system dimension and operating SNRs. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Gamma distribution, SNR, ZF precoding, Multiuser MIMO
in
IEEE Wireless Communications Letters
volume
6
issue
1
pages
4 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85013499636
ISSN
2162-2345
DOI
10.1109/LWC.2016.2631602
language
English
LU publication?
no
id
0a154e5b-d113-4f44-aff3-8bf4eb52bc22
date added to LUP
2018-11-28 13:38:17
date last changed
2019-08-18 04:53:33
@article{0a154e5b-d113-4f44-aff3-8bf4eb52bc22,
  abstract     = {An accurate approximation is developed for the distribution of the instantaneous per-terminal signal-to-noise-ratio (SNR) of a downlink multiuser multiple-input multiple-output system with zero-forcing (ZF) precoding. Our analysis assumes a Ricean fading environment, where we show that the SNR at a given terminal is well approximated by the gamma distribution and we derive its parameters. The analysis relies on densities of an arbitrary eigenvalue and a pair of arbitrary eigenvalues of the uncorrelated complex non-standard, noncentral Wishart matrices. Unlike previous studies, we consider microwave and millimeter-wave channel parameters with a unique Rice factor for each terminal. We demonstrate that stronger line-of-sight adversely impacts the ZF SNR, while increasing the Rice factor variability results in higher peak ZF SNR. Our approximations are insensitive to changes in the system dimension and operating SNRs.},
  articleno    = {7752888},
  author       = {Tataria, Harsh and Smith, Peter J and Greenstein, Larry J. and Dmochowski, Pawel A},
  issn         = {2162-2345},
  keyword      = {Gamma distribution,SNR,ZF precoding,Multiuser MIMO},
  language     = {eng},
  month        = {02},
  number       = {1},
  pages        = {74--77},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Wireless Communications Letters},
  title        = {Zero-Forcing Precoding Performance in Multiuser MIMO Systems With Heterogeneous Ricean Fading},
  url          = {http://dx.doi.org/10.1109/LWC.2016.2631602},
  volume       = {6},
  year         = {2017},
}