Title :
Computation of spectra with unequal resolution using the fast Fourier transform
Author :
Oppenheim, A. ; Johnson, D. ; Steiglitz, K.
Abstract :
The discrete Fourier transform of a sequence, which can be computed using the fast Fourier transform algorithm, represents samples of the z transform equally spaced around the unit circle. In this letter, a technique is discussed and illustrated for transforming a sequence to a new sequence whose discrete Fourier transform is equal to samples of the z transform of the original sequence at unequally spaced angles around the unit circle.
Keywords :
Attenuation; Circuits; Conductivity; Electrical resistance measurement; Fast Fourier transforms; Frequency; Impedance; Optical propagation; Propagation delay; Strips;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1971.8146
