Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1977-08-30
1996-03-26
Buczinski, Stephen C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342384, 342380, G01S 316, G01S 328
Patent
active
055024483
ABSTRACT:
A radar interference circuit which rejects both continuous noise and shorulse interference signals. A plurality of omni-directional antennas are placed around the main directional radar antenna and connected in differing sets to a plurality of canceller means to each of which the main antenna signal is also connected. The canceller means for each set of three Omnis and the main antenna cancels out the white-noise interference received by that group of antennas. The outputs of the plurality of canceller means are then taken in different sets of two each, subtracted and compared to a threshold signal. If one or more comparator outputs are above the threshold, signifying that the antenna pulse signal is being received through the sidelobes of the antenna patterns, the outputs of these comparators will be a one signal and the OR gate, to which the comparator outputs are fed, will provide an output to blank the radar. Thus, short-pulse signals arriving through the sidelobes of the antenna patterns are rejected as interference signals.
REFERENCES:
patent: 3938153 (1976-02-01), Lewis et al.
patent: 3938154 (1976-02-01), Lewis
patent: 3978483 (1976-08-01), Lewis et al.
patent: 4044359 (1977-08-01), Applebaum et al.
Cantrell Ben H.
Lewis Bernard L.
Buczinski Stephen C.
McDonnell Thomas E.
Miles Edward F.
The United States of America as represented by the Secretary of
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