Title :
Accuracy of sine-wave frequency estimation by an iterative Interpolated DFT algorithm
Author :
Belega, Daniel ; Petri, Dario ; Dallet, Dominique
Author_Institution :
Dept. of Meas. & Opt. Electron., Politeh. Univ. of Timisoara, Timisoara, Romania
Abstract :
In this paper the accuracy of the sine-wave frequency estimator returned by an iterative Interpolated Discrete Fourier Transform (IpDFT) algorithm based on a Maximum Sidelobe Decay (MSD) window is analyzed. The expressions for the contribution to the frequency estimation error of either the spectral interference from the sine-wave image component and wideband noise are derived. It is shown that two algorithm iterations ensure the minimum noise sensitivity achievable with the adopted window. The accuracy of the derived expressions is verified by means of computer simulations and validated by experimental results.
Keywords :
discrete Fourier transforms; frequency estimation; image processing; interpolation; iterative methods; spectral analysis; IpDFT algorithm; MSD window; iterative interpolated DFT algorithm; iterative interpolated discrete Fourier transform algorithm; maximum sidelobe decay window; sine-wave frequency estimation; sine-wave image component; spectral interference; Accuracy; Discrete Fourier transforms; Frequency estimation; Interference; Interpolation; Noise; Wideband; Uncertainty analysis; frequency estimation; interpolation algorithms; sine-wave; windowing;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2015 IEEE International
Conference_Location :
Pisa
DOI :
10.1109/I2MTC.2015.7151553
