Communications: directive radio wave systems and devices (e.g. – Directive – Utilizing correlation techniques
Patent
1980-05-05
1994-11-01
Buczinski, Stephen C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Utilizing correlation techniques
342384, 342432, 455283, G01S 316, G01S 328, G01S 504, H04B 118
Patent
active
053610741
ABSTRACT:
An interference suppression system for cancelling undesired signals recei through the mainlobe of an antenna as well as its sidelobes. The interference suppression system has a main channel input having high gain for receiving desired signals and undesired signals and forming a main channel waveform, and an auxiliary channel input having low gain for receiving desired signals and undesired signals and forming an auxiliary channel waveform. A control circuit senses the relative undesired signal power in the two channels and responds by switching the waveforms in the two channels between two inputs of an interference-reducing circuit according to whether sidelobe or mainlobe interference is present in the main channel. The interference-reducing circuit corrects whichever waveform is fed to its first input in amplitude and phase and combines the corrected waveform with the other waveform at its second input to form an output waveform such that undesired signals in the two input waveforms substantially cancel one another while the desired signal is not cancelled.
REFERENCES:
patent: 3860924 (1975-01-01), Evans
patent: 3938154 (1976-02-01), Lewis
patent: 3987444 (1976-10-01), Masak
patent: 4044359 (1977-08-01), Applebaum et al.
patent: 4096480 (1978-06-01), Miner et al.
patent: 4275397 (1981-06-01), Gutleber
Buczinski Stephen C.
McDonnell Thomas E.
The United States of America as represented by the Secretary of
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