Keywords
MIMO communication, antenna arrays, channel capacity, directive antennas
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.
Original Publication Citation
Bikhazi, N. W., and M. A. Jensen. "The Relationship between Antenna Loss and Superdirectivity in MIMO Systems." Wireless Communications, IEEE Transactions on 6.5 (27): 1796-82
BYU ScholarsArchive Citation
Jensen, Michael A. and Bikhazi, Nicolas W., "The relationship between antenna loss and superdirectivity in MIMO systems" (2007). Faculty Publications. 259.
https://scholarsarchive.byu.edu/facpub/259
Document Type
Peer-Reviewed Article
Publication Date
2007-05-01
Permanent URL
http://hdl.lib.byu.edu/1877/1124
Publisher
IEEE
Language
English
College
Ira A. Fulton College of Engineering and Technology
Department
Electrical and Computer Engineering
Copyright Status
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Copyright Use Information
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