Title :
Phase sensitive frequency estimation algorithm for asynchronously sampled harmonically distorted signals
Author_Institution :
Metrol. Inst. of the Republic of Slovenia, Ljubljana, Slovenia
Abstract :
An algorithm for the estimation of the frequency from asynchronously sampled harmonically distorted signals is described. Phase difference calculation in the time domain using a three-parameter sine fit algorithm is proposed as a basis for estimating the sampled signal frequency. Comparison with standard four parameter sine fit algorithm (4PSF) and three-point interpolated DFT algorithm (I3DFT) demonstrates improved frequency estimation for harmonically distorted signals when at least 2 signal cycles are sampled.
Keywords :
discrete Fourier transforms; frequency estimation; harmonic distortion; interpolation; phase estimation; signal sampling; time-domain analysis; I3DFT; asynchronously sampled harmonically distorted signal; phase difference calculation; phase sensitive frequency estimation algorithm; sampled signal frequency; signal cycle; standard 4PSF; standard four parameter sine fit algorithm; three-parameter sine fit algorithm; three-point interpolated DFT algorithm; time domain analysis; Estimation; Frequency estimation; Harmonic analysis; Harmonic distortion; Sensitivity; Time frequency analysis; frequency estimation; harmonic distortion; phase detection; signal analysis; sine fitting; styling;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE
Conference_Location :
Binjiang
Print_ISBN :
978-1-4244-7933-7
DOI :
10.1109/IMTC.2011.5944152
