The use of DFT windows in signal-to-noise ratio and harmonic distortion computations

Author

Solomon, Otis M., Jr.

Author_Institution

Sandia Nat. Lab., Albuquerque, NM, USA

fYear

1993

fDate

18-20 May 1993

Firstpage

103

Lastpage

108

Abstract

The author presents a method for estimating the root-mean-square (RMS) value of a sine wave from the magnitude of its discrete Fourier transform (DFT), with special attention to the selection of the DFT window. The set of DFT frequencies that constitute a harmonic depends on the DFT window, the length of the DFT, and the number of bits of the digitizer. Criteria are developed for choosing the DFT frequencies that correspond to a sine wave. These criteria lead to better choices of DFT windows for SNR and harmonic distortion calculations

Keywords

digital simulation; discrete Fourier transforms; harmonic distortion; multiprogramming; parameter estimation; signal processing; DFT; DFT windows; SNR; computer simulation; discrete Fourier transform; harmonic distortion computations; root-mean-square; signal processing; signal-to-noise ratio; sine wave; Discrete Fourier transforms; Distortion measurement; Floors; Frequency; Harmonic distortion; Laboratories; Power harmonic filters; Root mean square; Signal to noise ratio; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1993. IMTC/93. Conference Record., IEEE

Conference_Location

Irvine, CA

Print_ISBN

0-7803-1229-5

Type

conf

DOI

10.1109/IMTC.1993.382671

Filename

382671