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The relationship between antenna loss and superdirectivity in MIMO systems

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Permanent URL	http://hdl.lib.byu.edu/1877/1124
Title	The relationship between antenna loss and superdirectivity in MIMO systems
BYU Creator	Jensen, Michael A. Bikhazi, Nicolas W.
Keywords	MIMO communication; antenna arrays; channel capacity; directive antennas
Description/Abstract	Multiple-input multiple-output (MIMO) communication systems can theoretically use array superdirectivity to optimally exploit the propagation channel. This superdirectivity leads to very large capacity bounds, particularly when the antennas are closely spaced. However, because superdirective behavior is difficult to achieve in practice, new capacity bounds have been formulated for the case where the level of array superdirectivity is constrained. Existing capacity analyses limit the superdirectivity in a suboptimal way. In this paper, the impact of superdirectivity in the capacity solution is limited by introducing finite ohmic loss in the transmit and receive antenna elements. Computational results reveal that even a small amount of ohmic loss significantly decreases the achievable system capacity.
Source	Bikhazi, N. W., and M. A. Jensen. "The Relationship between Antenna Loss and Superdirectivity in MIMO Systems." Wireless Communications, IEEE Transactions on 6.5 (2007): 1796-802;
Publisher	IEEE
Date Original	2007-05
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) 2007 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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