Narrowband interference canceller for wideband communication...

Details Narrowband interference canceller for wideband communication... Narrowband interference canceller for wideband communication...

2005-12-13

2005-12-13

Ngo, Chuong D (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S322000

Reexamination Certificate

active

06976044

ABSTRACT:
A method and apparatus for adaptively removing interference from a signal. In one embodiment, the invention comprises an infinite impulse response (IIR) notch filter configured to receive a wideband signal and provide a filtered output signal, and a controller coupled to the notch filter to adaptively control the null frequency of the notch filter thereby removing narrowband interference from the received wideband signal. The controller may employ a gradient-based algorithm to detect the highest power frequency band in the output signal and modify the null frequency of the notch filter to minimize the power of the output signal.

REFERENCES:
patent: 5768166 (1998-06-01), Palatnik
patent: 5960091 (1999-09-01), White et al.
patent: 6160588 (2000-12-01), Ma et al.
patent: 6683913 (2004-01-01), Kantschuk
patent: 913951 (1999-05-01), None

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