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Phase sensitive frequency estimation algorithm for asynchronously sampled harmonically distorted signals

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1 Author(s)
Lapuh, R. ; Metrol. Inst. of the Republic of Slovenia, Ljubljana, Slovenia

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.

Published in:

Instrumentation and Measurement Technology Conference (I2MTC), 2011 IEEE

Date of Conference:

10-12 May 2011