Keyholes, correlations, and capacities of multielement transmit and receive antennas

Multielement system capacities are usually thought of as limited only by correlations between elements. It is shown here that degenerate channel phenomena called "keyholes" may arise under realistic assumptions which have zero correlation between the entries of the channel matrix H and yet...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2002-04, Vol.1 (2), p.361-368
Main Authors: Chizhik, D., Foschini, G.J., Gans, M.J., Valenzuela, R.A.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Arrays
Channels
Correlation
Diffraction
Exact sciences and technology
Gallium nitride
Keyholes
Mathematical analysis
Matrix decomposition
Narrowband
Outdoor
Radiocommunications
Receiving antennas
Scattering
Signal processing
Singular value decomposition
Telecommunications
Telecommunications and information theory
Transmitters
Transmitting antennas
Wideband
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Summary:Multielement system capacities are usually thought of as limited only by correlations between elements. It is shown here that degenerate channel phenomena called "keyholes" may arise under realistic assumptions which have zero correlation between the entries of the channel matrix H and yet only a single degree of freedom. Canonical physical examples of keyholes are presented. For outdoor environments, it is shown that roof edge diffraction is perceived as a "keyhole" by a vertical base array that may be avoided by employing instead a horizontal base array.
ISSN:1536-1276
1558-2248
DOI:10.1109/7693.994830