USING INTERMEDIATE FFT RESULTS IN MEASUREMENT SIGNAL ANALYSIS

J. Sawicki

Abstract

A possible use of information contained in the well known Fast Fourier Transform, calculated for some subsets of samples belonging to an analyzed sequence is proposed. The above mentioned information will be particularly important if the sequence to be identified takes nonzero values only within a certain subinterval of the analyzed period. The described method refers also to some properties of nonharmonic orthogonal sets of functions and makes use of them. Also some remarks concerning signals buried in noise are given. Typical signals coming from electromagnetic transducers are analyzed; the results illustrate the proposed method.

Keywords

digital signal analysis, fast algorithms, nonharmonic orthogonal functions

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IMEKO-WC-2000-TC4-P157.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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