Electromagnetic considerations for communicating on correlated MIMO channels with covariance information

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Permanent URL	http://hdl.lib.byu.edu/1877/1048
Title	Electromagnetic considerations for communicating on correlated MIMO channels with covariance information
BYU Creator	Jensen, Michael A.
Creator	Wallace, Jon W.
Keywords	MIMO communication; electromagnetic coupling; fading channels; finite difference time-domain analysis
Description/Abstract	Previous results for correlated block-fading MIMO channels with covariance information indicate guaranteed capacity growth with additional transmit elements and that in rapidly fading channels, vanishing element spacing maximizes capacity. However, because prior analysis neglects antenna electromagnetic coupling, the observations are not necessarily valid for small inter-element spacing. This work applies radiated power considerations to the analysis to demonstrate that additional elements do not always increase capacity and that vanishing element spacing is not optimal. An effective gain metric is introduced that quantifies the performance increase with additional transmitters in the presence of transmit correlation and mutual coupling. Performance simulations using the electromagnetic properties of uniform linear arrays characterized by closed form expressions for Hertzian dipoles and detailed finite-difference time-domain (FDTD) simulations of half-wave dipoles illustrate that capacity gains arc possible when correlation stems from directional bias in the channel but not when it arises due to compact element spacing.
Source	Wallace, J. W., and M. A. Jensen. "Electromagnetic Considerations for Communicating on Correlated MIMO Channels with Covariance Information." Wireless Communications, IEEE Transactions on 7.2 (2008): 543-51;
Publisher	IEEE
Date Original	2008-02
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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