Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2007-02-27
2007-02-27
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S381000
Reexamination Certificate
active
10850443
ABSTRACT:
Methods and apparatus for improving the effective resolving power of an array antenna are described that are not limited by the physical characteristics of the array. In an array with M elements, up to M−1 directional vectors may be selected, preferably at angles corresponding to the main lobe and/or side lobes of an array antenna beam pattern. A received signal plus interference (s+i) is zero-transformed to eliminate interference received from the plurality of selected directions. The zero-transformed s+i is then restored to obtain the signal of interest observed at maximum gain undisturbed by interference incident from arbitrarily close signal sources. The approach may be combined with conventional beamforming techniques to remove interference incident from angles corresponding to the side lobes, where conventional beamforming techniques are most effective.
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Minkoff, John, a new very high resolution interference rejection method with potential for radio astronomy application, Radio Science, vol. 38, No. 3, 1042, Copyright 2003 by the American Geophysical Union, May 23, 2003.
Edell Shapiro & Finnan LLC
ITT Manufacturing Enterprises Inc.
Mull F H
Tarcza Thomas H.
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