A §et of High-Resolution Computationally-Efficient Discrete Spectral Windows
Nezih C. Geskinli, Davras Yavuz, R. A. Kqbylinski, Paul D. Stigall, R.E. Ziemer · 1978
A set of high-resolution discrete spectral windows which have small numbers of nonzero terms and attenuates high lag values is derived for the direct method of power spectra estimation by way of discrete Fourier transformation OFT) in which the estimate is the modulus square of the DFT of the windowed sampled process. In- herently, these spectral windows also provide a significant means of high-resolution, overshoot-free, computationally-efficient discrete-time, data smoothing. Another notable property is that, the effective con- tinuous spectral windows have 18 dB/oct roll-off. For the convenience of the users, a computer program in Fortran IV which obtains the optimal windows, is supplemented. The fiist member of the set turns out to be the well-known Hanning window. The following 12 members, which attenuate the high lag values below -60 dB, are tabulated. Al- though the other members of the set can readily be obtained by the given program, the tabulated windows are sufficient for most applications.