Telecommunications – Transmitter and receiver at separate stations – Distortion – noise – or other interference prevention,...
Patent
1993-11-19
1996-07-30
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
Distortion, noise, or other interference prevention,...
455 523, 455 63, 455273, 4552761, 4552781, H04B 110
Patent
active
055421016
ABSTRACT:
Signals from multiple signal paths are received using a multi-element antenna and a beam-forming network. Signals from each of the antenna elements are sampled to form a sample vector. Several sample vectors are used to form an auto-covariance matrix. A singular value decomposition of the auto-covariance matrix is used to form three matrices. The first matrix is used to determine the number of signal paths and the second matrix is used to form several polynomials. The polynomial roots that are on or near the unit circle are used to determine points on the unit circle that are associated with each signal path. Each point on the unit circle is used to calculate weights for a beam-forming network that forms a receive beam for each signal path.
REFERENCES:
patent: 4112430 (1978-09-01), Ladstatter
patent: 5274844 (1993-12-01), Harrison et al.
"Adaptive Equalization for TDMA Digital Mobile Radio" by John G. Proakis, IEEE Transactions on Vehicular Technology, vol. 40, No. 2, May 1991, Piscataway, New Jersey.
AT&T Corp.
Eisenzopf Reinhard J.
Malvone Christopher N.
To Doris
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