Adaptive rejection of polyharmonic noise when frequency fluctuations of the pitch
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Abstract
The task of interference suppression, which consists from quasi-harmonic components with frequencies multiple to some fundamental frequency, is considered. The comb filter with interpolation to reject interference is proposed. In contrast to earlier known filters the proposed one can be applied at arbitrary ratio between sampling rate of input signals and fundamental frequency of the interference. In addition rather simple in implementation and steady in working the estimation procedure for fundamental frequency of interference is proposed. Efficiency of the proposed technique is confirmed by means of computer simulation
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