離散値系ウェーブレット変換によるノイズフィルタ評価の検討 [in Japanese] Evaluation of Noise Filter Characteristics by Discrete Wavelet Transformation [in Japanese]
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In the present paper, we propose a wavelet analysis technique to evaluate the noise filtering characteristics of the filter. To analyse noise problem, many people have used Fourier analysis. But the Fourier spectrum reveals only the frequency information. Therefore, it is difficult to obtain the noise waveforms from the Fourier spectrum. To overcome this difficulty, we employed the wavelet analysis technique. Wavelet analysis makes it possible to get the time as well as frequency domain information. As a result, it was shown that the wavelet analysis was one of the promising methodologies for noise filter characteristic evaluation.
- The Transactions of the Institute of Electrical Engineers of Japan. A
The Transactions of the Institute of Electrical Engineers of Japan. A 117(2), 128-133, 1997-02