Limiting audible noise introduction through FM antenna tuning

Details Limiting audible noise introduction through FM antenna tuning Limiting audible noise introduction through FM antenna tuning

2007-09-21

2010-10-19

Le, Nhan (Department: 2618)

Telecommunications

Transmitter

Noise or interference elimination

C455S063100, C455S296000, C375S346000

Reexamination Certificate

active

07817969

ABSTRACT:
An FM receiver including an FM antenna that receives continuous wavelength signals, where the FM receiver is coupled to the FM antenna and operable to alter a center frequency of a gain profile of the FM antenna. The FM receiver includes a low noise amplifier module that is coupled to amplify the continuous wavelength signal to produce an amplified RF signal therefrom. A down conversion module is coupled to mix the amplified RF signal with a local oscillation to produce an information signal. A filter module is coupled to filter the information signal to produce a filtered information signal. A demodulation module is coupled to capture audio information from the filtered information signal. A signal monitoring module is coupled to monitor the FM signal quality of a received continuous wavelength signal. The signal monitoring module produces a signal quality indication therefrom. An antenna control module produces a signal value based upon the signal quality indication, wherein the signal value operates to alter the center frequency of a gain profile of the FM antenna.

REFERENCES:
patent: 5303414 (1994-04-01), Brinkhaus
patent: 5339463 (1994-08-01), Hansen
patent: 5812673 (1998-09-01), Nohara et al.
patent: 6097773 (2000-08-01), Carter et al.
patent: 6456833 (2002-09-01), Sessink
patent: 7127218 (2006-10-01), Lindenmeier

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