On the Optimality-Range of Beamforming for MIMO Systems with Covariance Feedback
Summary :
We study the optimal transmission strategy of a multiple-input multiple-output (MIMO) communication system with covariance feedback. We assume that the receiver has perfect channel state information while the transmitter knows only the channel covariance matrix. We consider the common downlink transmission model where the base station is un-obstructed while the mobile station is surrounded by local scatterer. Therefore the channel matrix is modeled with Gaussian complex random entries with independent identically distributed rows and correlated columns. For this transmission scenario the capacity achieving eigenvectors of the transmit covariance matrix are known. The capacity achieving eigenvalues can not be computed easily. We analyze the optimal transmission strategy as a function of the transmit power. A MIMO system using only one eigenvalue performs beamforming. We derive a necessary and sufficient condition for when beamforming achieves capacity. The theoretical results are illustrated by numerical simulations.
- Publication
- IEICE TRANSACTIONS on Fundamentals Vol.E85-A No.11 pp.2521-2528
- Publication Date
- 2002/11/01
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Communication Theory and Signals
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Holger BOCHE, Eduard JORSWIECK, "On the Optimality-Range of Beamforming for MIMO Systems with Covariance Feedback" in IEICE TRANSACTIONS on Fundamentals,
vol. E85-A, no. 11, pp. 2521-2528, November 2002, doi: .
Abstract: We study the optimal transmission strategy of a multiple-input multiple-output (MIMO) communication system with covariance feedback. We assume that the receiver has perfect channel state information while the transmitter knows only the channel covariance matrix. We consider the common downlink transmission model where the base station is un-obstructed while the mobile station is surrounded by local scatterer. Therefore the channel matrix is modeled with Gaussian complex random entries with independent identically distributed rows and correlated columns. For this transmission scenario the capacity achieving eigenvectors of the transmit covariance matrix are known. The capacity achieving eigenvalues can not be computed easily. We analyze the optimal transmission strategy as a function of the transmit power. A MIMO system using only one eigenvalue performs beamforming. We derive a necessary and sufficient condition for when beamforming achieves capacity. The theoretical results are illustrated by numerical simulations.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e85-a_11_2521/_p
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@ARTICLE{e85-a_11_2521,
author={Holger BOCHE, Eduard JORSWIECK, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={On the Optimality-Range of Beamforming for MIMO Systems with Covariance Feedback},
year={2002},
volume={E85-A},
number={11},
pages={2521-2528},
abstract={We study the optimal transmission strategy of a multiple-input multiple-output (MIMO) communication system with covariance feedback. We assume that the receiver has perfect channel state information while the transmitter knows only the channel covariance matrix. We consider the common downlink transmission model where the base station is un-obstructed while the mobile station is surrounded by local scatterer. Therefore the channel matrix is modeled with Gaussian complex random entries with independent identically distributed rows and correlated columns. For this transmission scenario the capacity achieving eigenvectors of the transmit covariance matrix are known. The capacity achieving eigenvalues can not be computed easily. We analyze the optimal transmission strategy as a function of the transmit power. A MIMO system using only one eigenvalue performs beamforming. We derive a necessary and sufficient condition for when beamforming achieves capacity. The theoretical results are illustrated by numerical simulations.},
keywords={},
doi={},
ISSN={},
month={November},}
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TY - JOUR
TI - On the Optimality-Range of Beamforming for MIMO Systems with Covariance Feedback
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2521
EP - 2528
AU - Holger BOCHE
AU - Eduard JORSWIECK
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E85-A
IS - 11
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - November 2002
AB - We study the optimal transmission strategy of a multiple-input multiple-output (MIMO) communication system with covariance feedback. We assume that the receiver has perfect channel state information while the transmitter knows only the channel covariance matrix. We consider the common downlink transmission model where the base station is un-obstructed while the mobile station is surrounded by local scatterer. Therefore the channel matrix is modeled with Gaussian complex random entries with independent identically distributed rows and correlated columns. For this transmission scenario the capacity achieving eigenvectors of the transmit covariance matrix are known. The capacity achieving eigenvalues can not be computed easily. We analyze the optimal transmission strategy as a function of the transmit power. A MIMO system using only one eigenvalue performs beamforming. We derive a necessary and sufficient condition for when beamforming achieves capacity. The theoretical results are illustrated by numerical simulations.
ER -
English
