On the General Analysis of Coordinated Regularized Zero-Forcing Precoding: An Application to Two-Tier Small-Cell Networks
(2017) In IEEE Transactions on Communications 65(7). p.3133-3150- Abstract
- General analysis of expected per-terminal signalto-interference-plus-noise-ratio (SINR) and ergodic per-cell sum spectral efficiency for a multi-cellular system with coordinated regularized zero-forcing (RZF) precoding is presented.
An application to two-tier small-cell networks is considered, assuming independent and identically distributed (i.i.d.) and semi-correlated Rayleigh fading channels, with spatial correlation at the base station. Our analysis caters for equal and unequal correlation matrices for each terminal. For the i.i.d. case and when each terminal is assigned an equal correlation matrix, our expressions are averaged over the eigenvalue densities of the channel correlation matrices, which follow an uncorrelated and... (More) - General analysis of expected per-terminal signalto-interference-plus-noise-ratio (SINR) and ergodic per-cell sum spectral efficiency for a multi-cellular system with coordinated regularized zero-forcing (RZF) precoding is presented.
An application to two-tier small-cell networks is considered, assuming independent and identically distributed (i.i.d.) and semi-correlated Rayleigh fading channels, with spatial correlation at the base station. Our analysis caters for equal and unequal correlation matrices for each terminal. For the i.i.d. case and when each terminal is assigned an equal correlation matrix, our expressions are averaged over the eigenvalue densities of the channel correlation matrices, which follow an uncorrelated and correlated complex central Wishart distribution. With unequal correlation matrices, we exploit the high signal-to-noise ratio (SNR) convergence of RZF precoding to zero-forcing (ZF) precoding and use a second-order Neumann series expansion to derive closed-form approximations to the expected RZF SINR and ergodic sum spectral efficiency, via the expected ZF SNR and ergodic sum spectral efficiency. Our numerical results show the adverse effects of intercellular interference, along with the
improvements in the above-mentioned performance metrics with network-wide coordination over cell-wide and macro-only coordination strategies. The derived expressions are robust to changes in system dimensions, operating SNRs, and correlation levels. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/fe92be32-6213-4534-8ac9-0844947043d4
- author
- Tataria, Harsh LU ; Smith, Peter J and Dmochowski, Pawel A
- publishing date
- 2017-07-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- SINR, Spectral efficiency, BS coordination, RZF precoding, Two-tier small-cell networks, Complex Wishart matrices
- in
- IEEE Transactions on Communications
- volume
- 65
- issue
- 7
- article number
- 7903633
- pages
- 18 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- external identifiers
-
- scopus:85028986363
- ISSN
- 0096-1965
- DOI
- 10.1109/TCOMM.2017.2695199
- language
- English
- LU publication?
- no
- id
- fe92be32-6213-4534-8ac9-0844947043d4
- date added to LUP
- 2018-11-28 13:31:32
- date last changed
- 2022-04-25 19:29:37
@article{fe92be32-6213-4534-8ac9-0844947043d4,
abstract = {{General analysis of expected per-terminal signalto-interference-plus-noise-ratio (SINR) and ergodic per-cell sum spectral efficiency for a multi-cellular system with coordinated regularized zero-forcing (RZF) precoding is presented.<br/>An application to two-tier small-cell networks is considered, assuming independent and identically distributed (i.i.d.) and semi-correlated Rayleigh fading channels, with spatial correlation at the base station. Our analysis caters for equal and unequal correlation matrices for each terminal. For the i.i.d. case and when each terminal is assigned an equal correlation matrix, our expressions are averaged over the eigenvalue densities of the channel correlation matrices, which follow an uncorrelated and correlated complex central Wishart distribution. With unequal correlation matrices, we exploit the high signal-to-noise ratio (SNR) convergence of RZF precoding to zero-forcing (ZF) precoding and use a second-order Neumann series expansion to derive closed-form approximations to the expected RZF SINR and ergodic sum spectral efficiency, via the expected ZF SNR and ergodic sum spectral efficiency. Our numerical results show the adverse effects of intercellular interference, along with the<br/>improvements in the above-mentioned performance metrics with network-wide coordination over cell-wide and macro-only coordination strategies. The derived expressions are robust to changes in system dimensions, operating SNRs, and correlation levels.}},
author = {{Tataria, Harsh and Smith, Peter J and Dmochowski, Pawel A}},
issn = {{0096-1965}},
keywords = {{SINR; Spectral efficiency; BS coordination; RZF precoding; Two-tier small-cell networks; Complex Wishart matrices}},
language = {{eng}},
month = {{07}},
number = {{7}},
pages = {{3133--3150}},
publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
series = {{IEEE Transactions on Communications}},
title = {{On the General Analysis of Coordinated Regularized Zero-Forcing Precoding: An Application to Two-Tier Small-Cell Networks}},
url = {{http://dx.doi.org/10.1109/TCOMM.2017.2695199}},
doi = {{10.1109/TCOMM.2017.2695199}},
volume = {{65}},
year = {{2017}},
}