Reducing narrowband interference in a wideband signal

Details Reducing narrowband interference in a wideband signal Reducing narrowband interference in a wideband signal

2007-03-20

2007-03-20

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

Reexamination Certificate

active

10259891

ABSTRACT:
Narrowband interference in a wideband RF signal is reduced by a notch filter operating at IF between down- and up-converters supplied by a local oscillator (LO) at a frequency controlled by a control circuit. The control circuit detects interference by determining power in each of a plurality of narrowband channels, also at IF via another down-converter with a controlled LO frequency, relative to power of the wideband RF signal and scaled in accordance with the wideband and narrowband bandwidths. The control circuit controls the LOs for scanning the narrowband channels to determine a channel with greatest interference and to filter out this narrowband channel with the notch filter. In the absence of interference, the notch is tuned outside the signal bandwidth.

REFERENCES:
patent: 4907293 (1990-03-01), Ueno
patent: 5307515 (1994-04-01), Kuo et al.
patent: 5423064 (1995-06-01), Sakata
patent: 5519887 (1996-05-01), Lieu
patent: 0812069 (1997-04-01), None
patent: 0046929 (1999-02-01), None
patent: 0150622 (2000-12-01), None
patent: 0178242 (2001-06-01), None

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