Reduction of adjacent channel interference

Details Reduction of adjacent channel interference Reduction of adjacent channel interference

1977-09-26

1980-06-03

Olms, Douglas W.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455311, H04B 110, H04B 168

Patent

active

042063175

ABSTRACT:
An improved system and method for reducing adjacent channel interference in radio systems by making use of the so called "cocktail party effect". Also, the selectivity is improved by measuring the level of adjacent channel interference above and below the desired channel and automatically changing selectivity characteristics of the receiver in accordance with the measured interference.
The system is particularly applicable to the reception of AM Stereo signals but it may also be used to improve the performance of monophonic systems.

REFERENCES:
patent: 2835889 (1958-05-01), Dyer et al.
patent: 3218393 (1965-11-01), Kahn
patent: 3311833 (1967-03-01), Lewis et al.
patent: 3707603 (1972-12-01), Limberg
patent: 3908090 (1975-09-01), Kahn
patent: 3919482 (1975-11-01), Hamada
patent: 3944749 (1976-03-01), Kahn
patent: 3973203 (1976-08-01), Kahn
patent: 4018994 (1977-04-01), Kahn
patent: 4042782 (1977-08-01), Worcester
"Radio Receiver Design" by K. R. Sturley, 1953, John Wiley & Sons Inc., pp. 517, 518, 543-545 & 548-550.

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