Patent ID: 6683913
Filing Date: 2004-01-27
Classification: H04B

Abstract:
A high-speed receiver, adapted to receive signals over an input line in the presence of narrowband radio frequency interference (RFI), comprising:a RFI canceller module, which is coupled to receive samples of the interference from the input line, and which comprises: an adaptive bandpass filter, which is adapted to track a dominant frequency of the interference, and to generate a filtered output in a narrow frequency range centered on the dominant frequency; and a corrector, which is coupled to receive the filtered output from the adaptive bandpass filter and to generate, responsive thereto, an estimate of the interference in the signals received by the receiver; and a subtractor, which is adapted to subtract the estimate of the interference from the signals received by the receiver so as to generate a corrected output signal, wherein the corrector is adapted to determine a variable filter coefficient using a normalized least-mean-square method and to apply the coefficient to the filtered output from the adaptive bandpass filter so as to generate the estimate of the interference.