Co-channel FM signal/interference canceller

Details Co-channel FM signal/interference canceller Co-channel FM signal/interference canceller

1994-04-15

1997-12-09

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455206, 455260, 329336, 329316, 329325, H04B 110

Patent

active

056970862

ABSTRACT:
A combination of two phase-lock loops, and a cancellation circuit are used to remove a dominant FM signal from within a signal environment. The two phase-lock loops together produce a replica of the highest power (i.e. dominant) FM signal. The cancellation circuit uses this replica in a demodulation, notch-filtering, and remodulation process to excise the dominant FM signal, leaving the other signal(s) undisturbed. Potential applications include co-channel FM signal/interference cancellation and optimizing utilization of RF spectrum.

REFERENCES:
patent: 3199028 (1965-08-01), Molin et al.
patent: 3753123 (1973-08-01), Carpenter et al.
patent: 4859958 (1989-08-01), Myers
patent: 4992747 (1991-02-01), Myers
patent: 5038115 (1991-08-01), Myers et al.

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