MIMO communication, antenna arrays, channel capacity, directive antennas
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). All Faculty Publications. 259.
Ira A. Fulton College of Engineering and Technology
Electrical and Computer Engineering
© 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