Title :
Application of discrete Fourier transform to electronic measurements
Author :
Liu, J.G. ; Schonecker, A. ; Fruhauf, U. ; Keitel, U. ; Gesemann, H.-J.
Author_Institution :
Fraunhofer-Inst. of Ceramics Technol. & Sinter Mater., Dresden, Germany
Abstract :
The problems in the application of the DFT to electronic measurement are analysed. The Lagrange-interpolation is used to pre-process the sampling data in order to be suitable for the DFT. Simulation results show a reasonable improvement of the calculation accuracy. Based on the DFT with the interpolation the sampling theorem is modified for precise electronic measurements. The proposed methods are applied to the separation of linear and nonlinear signals, the measurement of transfer function of linear systems and the impedance measurement of ceramic materials under high field intensities
Keywords :
ceramics; discrete Fourier transforms; electric impedance measurement; interpolation; linear systems; materials testing; signal sampling; transfer functions; DFT; Lagrange-interpolation; calculation accuracy; ceramic materials; discrete Fourier transform; electronic measurements; high field intensities; impedance measurement; linear signals; linear systems; nonlinear signals; sampling data preprocessing; sampling theorem; signal separation; simulation results; transfer function measurement; Acoustic measurements; Ceramics; Discrete Fourier transforms; Frequency; Impedance measurement; Interpolation; Optical filters; Phase measurement; Power harmonic filters; Sampling methods;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.652188
