Contribution of Interharmonic Component on the Interpolated DFT Frequency Estimator

• Abstract:

  This paper investigates the contribution to the sine-wave frequency estimator returned by the interpolated discrete Fourier transform (IpDFT) algorithm of a small amplitude interharmonic component located at least one bin apart the unknown frequency. An analytical expression for the frequency estimation error is derived assuming that a maximum sidelobe decay (MSD) window is employed and its accuracy is verified through computer simulations. Based on the derived expression some useful remarks are finally drawn.
• Keywords:

  error analysis, frequency estimation, interharmonic component, interpolated DFT algorithm, windowing
• Download:

  IMEKO-TC4-2019-034.pdf
• DOI:

  _unreg_tc4-2019.034

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