Patent ID: 7324616
Filing Date: 2008-01-29
Classification: H04B

Abstract:
1. A narrowband interference cancellation system comprising: a narrowband processing component configured to receive a signal and identify one or more narrowband interferers in the received signal, the narrowband processing component including a filter bank configured to separate the received signal into a predetermined number of channel bands; a wide band processing component coupled to receive both real and quadrature components of the received signal, the wide band processing component configured to provide an average level for an unfiltered version of the received signal; a soft decision metric generator coupled to both the narrowband processing component and the wide band processing component, the soft decision metric generator configured to produce metrics based on predetermined thresholds; and a filter component configured to receive coefficients from the soft decision metric generator, the filter component configured to cancel the one or more narrowband interferers; wherein the filter bank is coupled to a plurality of magnitude estimators configured to determine a magnitude estimate for each of the separate channel bands.