Pulse or digital communications – Repeaters – Testing
Patent
1983-06-29
1985-04-16
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
370 18, 375 38, 343361, H04J 1300, H04B 110
Patent
active
045120242
ABSTRACT:
A pulse code modulation communications system employing orthogonally sepaed noise code mate pairs having autocorrelation functions which upon detection in a matched filter and addition compress to a lobeless impulse. A mate pair of bi-polar digital noise codes are impressed on respective RF carriers generated by the same frequency source with one code mate being transmitted separately as a vertically polarized wave while the other code mate is transmitted separately as a horizontally polarized wave. The polarized RF carrier signals containing the code mates are respectively received by horizontally and vertically polarized antennas coupled to radio receiver apparatus which provides respective received signals containing the code mates. The code mates are then detected by matched filters which operate to compress the code mates. The compressed code mates are then linearly added to provide an output signal comprising a lobeless impulse signal.
REFERENCES:
patent: 3519746 (1970-09-01), Gutleber
patent: 3634765 (1972-01-01), Gutleber
patent: 4084137 (1978-04-01), Welti
patent: 4293953 (1981-10-01), Gutleber
patent: 4475215 (1984-10-01), Gutleber
Lane Anthony T.
Murray Jeremiah G.
Safourek Benedict V.
The United States of America as represented by the Secretary of
Zelenka Michael
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