Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 8, 2008
Patent Application Number
09827641
Date Filed
April 6, 2001
Patent Citations Received
Patent Primary Examiner
Patent abstract
An adaptive notch filter (ANF) module selectively filters a received wideband communication signal to eliminate narrowband interference that lies within the frequency spectrum of the wideband communication signal. To determine the presence of narrowband interference, the ANF module scans various known narrowband channels that lie within the frequency spectrum of the wideband communication signal and determines signal strengths for each of the narrowband channels. The signal strengths from the narrowband channels are compared to a threshold that is derived from the narrowband signal strengths. Narrowband channels having signal strengths that are greater than the threshold are determined to have interference.
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