APPARENT POWER ESTIMATION BY INTERPOLATION OF THE PRODUCT OF THE DFT COEFFICIENTS |
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| Jalen Štremfelj, Dušan Agrež, |
- Abstract:
- This paper describes the possibility of estimating the apparent power of a signal component using the interpolation of the products of amplitude discrete Fourier transform (DFT) coefficients. As with energy-based approach for the amplitude square estimation of the onechannel signal, the apparent power in the two-channel case can be estimated with the multiplied amplitude DFT coefficients around the component peak and a suitable interpolation algorithm. The use of the Hann window with well known frequency spectrum and the largest local amplitude DFT coefficients give lower systematic errors than the energy-based approach, although the frequency has to be estimated first.
- Keywords:
- non-coherent sampling, apparent power estimation, leakage effect, interpolated DFT, Hann window
- Download:
- IMEKO-WC-2012-TC4-O21.pdf
- DOI:
- -
- Event details
- Event name:
- XX IMEKO World Congress
- Title:
Metrology for Green Growth
- Place:
- Busan, REPUBLIC of KOREA
- Time:
- 09 September 2012 - 12 September 2012