Local Interpolator Derived From the Discrete Fourier Transform.

摘要

The discrete Fourier transform is used to obtain an analog of the Nyquist reconstruction formula for a limited number of data points. The resulting interpolator, when applied to the center of a slide window (rather than applied globally, as is usually done with Fourier-related techniques), can extend good interpolation performance to lower data sampling rates than is possible with polynomial interpolators.