PERIOD ESTIMATION OF THE MODULATED SIGNAL

Dusan Agrez

Abstract

In the paper, the two non-parametric algorithms for the period estimation are compared: the autocorrelation approach and the interpolated discrete Fourier transform (IDFT) approach both added with algorithm for searching of the lowest common frequency component or the largest period of the modulated signal. The direct approach by IDFT shows better results at two and more cycles of the investigated period in the measurement interval. Simulation results also show the robustness of the searching algorithm of the lowest common frequency component.

Keywords

period estimation, non-parametric approach, autocorrelation, IDFT

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IMEKO-WC-2009-TC4-289.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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