Limited dynamic range of spectrum analysis due to roundoff errors of the FFT

Quang Hung Nguyen, Istvan Kollar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Roundoff errors of the block-float Fast Fourier Transform (FFT) are treated. Special emphasis is given to the case when signals containing sine waves are analyzed. In the detection and analysis of sine waves, rms values and overall signal-to-noise ratios do not provide adequate information. An analysis of the maximum values is suggested, and the achievable dynamic range is given. It is shown that, in contrast to the common conviction, the dynamic range does not significantly depend on the point number of the FFT, when the roundoff errors originate dominantly from the arithmetic roundings within the FFT.

Original languageEnglish
Title of host publicationConference Record - IEEE Instrumentation and Measurement Technology Conference
PublisherPubl by IEEE
Pages47-50
Number of pages4
ISBN (Print)0780312295
Publication statusPublished - Jan 1 1993
EventProceedings of the 1993 IEEE Instrumentation and Measurement Technology Conference - Irvine, CA, USA
Duration: May 18 1993May 20 1993

Publication series

NameConference Record - IEEE Instrumentation and Measurement Technology Conference

Other

OtherProceedings of the 1993 IEEE Instrumentation and Measurement Technology Conference
CityIrvine, CA, USA
Period5/18/935/20/93

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Nguyen, Q. H., & Kollar, I. (1993). Limited dynamic range of spectrum analysis due to roundoff errors of the FFT. In Conference Record - IEEE Instrumentation and Measurement Technology Conference (pp. 47-50). (Conference Record - IEEE Instrumentation and Measurement Technology Conference). Publ by IEEE.