Reduced-feedback linear precoding with stable performance for the time-varying MIMO broadcast channel

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Permanent URL	http://hdl.lib.byu.edu/1877/1097
Title	Reduced-feedback linear precoding with stable performance for the time-varying MIMO broadcast channel
BYU Creator	Jensen, Michael A. Anderson, Adam L.
Creator	Zeidler, James R.
Keywords	Array signal processing; Broadcast channels; Feedback systems; MIMO systems; Time-varying channels
Description/Abstract	This work explores the performance of a multiple-input multiple-output broadcast channel where both the transmitter and receivers have outdated channel knowledge due to node motion or other time-variations in the communication channel. A performance analysis based on measured channel responses reveals significant throughput degradation for optimal linear and nonlinear precoding strategies unless the channel state information (CSI) is frequently fed back to the transmitter. The paper then develops a linear beamforming precoding strategy based on channel distribution information in the form of a full spatial correlation matrix for each user. This algorithm is shown to provide highly stable communication, with a throughput that is higher than that for optimal precoders operating on outdated CSI, in a time-variant environment, indicating that this approach can operate with significantly reduced feedback frequency. Furthermore, the paper demonstrates the use of the well-known Kronecker and Weichselberger models to parameterize the full correlation matrix to enable further reduction in the amount of feedback data required for implementation of the new beamforming technique.
Source	Anderson, A., J. Zeidler, and M. Jensen. "Reduced-Feedback Linear Precoding with Stable Performance for the Time-Varying MIMO Broadcast Channel." Selected Areas in Communications, IEEE Journal on 26.8 (2008): 1483-93;
Publisher	IEEE
Date Original	2008-10
Language	English eng en
Publication Type	Peer-Reviewed Articles
Type	Text
Format	application/pdf
Owning Institution	Brigham Young University
BYU College	Ira A. Fulton College of Engineering and Technology
BYU Department	Electrical and Computer Engineering
Copyright Status	(c) 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.;
Copyright Use Information	http://www.lib.byu.edu/generic_copyright.html

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Reduced-feedback linear precoding with stable performance for the time-varying MIMO broadcast channel

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