An Optimal Comb Filter for Time-Varying Harmonics Extraction(Special Section on Digital Signal Processing)

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概要

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• An optimum filter for extracting a time-varying harmonic signal from the noise-corrupted measurement is proposed. It is derived as a solution of the least mean square estimation with consideration of the pitch estimation error even without any assumption on the filter model. We obtain a comblike impulse response which consists of homologous and dilated distribution of weights just located periodically with a pitch interval. This remarkable structure is well suited to the proportionally expanding error of pitch repetition times. Examples of the filter design are presented, and the performance of noise suppression is examined by comparison with conventional comb filters.

• 社団法人電子情報通信学会の論文
• 1998-08-25

著者

• Ando S

  Univ. Tokyo Tokyo Jpn

• Ando Shigeru

  Faculty Of Engineering The University Of Tokyo

• NISHI Kazuki

  Department of Communication and Systems Engineering, University of Electro-Communications

• Nishi Kazuki

  Department Of Communication And Systems Engineering University Of Electro-communications

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• An Optimal Comb Filter for Time-Varying Harmonics Extraction(Special Section on Digital Signal Processing)

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