フーリエ変換における窓関数の位相特性

DOI Web Site Web Site 被引用文献2件 オープンアクセス

書誌事項

タイトル別名
  • Phase Transmission Characteristics of Temporal Windows in Fourier Transformation
  • フーリエ ヘンカン ニ オケル マド カンスウ ノ イソウ トクセイ

この論文をさがす

説明

In harmonic analysis of periodic wave, the discontinuity at the boundary of observation interval increases the spectral leakage. Several temporal windows have been developed to improve the spectral resolution. In Fourier transformation, input signal is transformed into complex data consisting of amplitude and phase. This paper describes the phase transmission characteristics of temporal windows. The phase preservability that the phase of input sinusoidal wave is preserved in peak component, can be improved by applying the windows. Phase error caused by the other harmonics depends on the amplitude transmission characteristics of windows, especially on their band-width. The spectral peak moves from n-th bin to (n+1)-th bin with the increase of input frequency. The frequency, at which the peak is shifted from n to n+1, becomes close to n+0.5 through temporal windows. Experiments of pitch-frequency detection using phase compensation method show that Hanning window and Cos window are more desirable than the others.<br>As a result, the temporal window improves the phase transmission characteristics.

収録刊行物

被引用文献 (2)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ