| 摘要 |
<p>PURPOSE:To use Fourier transformation in the manner of wavelet. CONSTITUTION:The prescribed pieces of data on a time base are inputted to an arithmetic part 10, Fourier-transformed here and outputted as the component of a time/frequency plane. The coefficient of this Fourier transformation is stored in a memory. Concerning this Fourier transformation, the range of time is limited at a function composed of discrete sample points on the time base, and local Fourier transformation is obtained based on the sample points within the prescribed time range. Therefore, the Fourier transformation can be provided in the manner of wavelet.</p> |
