NDLI: Spectrum analysis and EMI measurements based on time-domain methods

Content Provider	IEEE Xplore Digital Library
Author	Braun, S.
Copyright Year	2010
Description	Author affiliation: GAUSS Instruments GmbH, Munich, Germany (Braun, S.)
Abstract	Measurements of electromagnetic interference in time-domain allow to reduce the scan time by several orders of magnitude, in comparison to automated scans performed by the tuned selective voltmeters, which are known as EMI receivers. Spectrum analyzer are used for frequency selective measurements of signals. Such analyzers can perform fast sweeps or scans over large bands. A drawback of spectrum analyzers is the long sweep time, when a high frequency resolution is required. In this paper an overview of methods and systems is shown which perform the measurement in time-domain and use the short-time fast Fourier transform for the calculation of the spectrum rather than a sequential measurement. Baseband systems allow to speed up scans by several orders of magnitude. Systems with a broadband downconversion and a broadband analog-to-digital converter system allow to extend the frequency range beyond the Nyquist frequency of todays availabe ADCs. Powerful Short-time fast Fourier transform processors allow to process several frequencies at the same time. A gapless processing allows to analyze unstationary signals as well as small narrowband signals.
Starting Page	13
Ending Page	18
File Size	428281
Page Count	6
File Format	PDF
ISBN	9781424463411
e-ISBN	9781424463435
DOI	10.1109/COMITE.2010.5481259
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-04-19
Publisher Place	Czech Republic
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation time-domain Voltmeters Time domain analysis Frequency conversion Electromagnetic compatibility Time measurement frequency domain Spectral analysis fast Fourier transform Electromagnetic measurements Fast Fourier transforms Electromagnetic interference electromagnetic interference Signal processing
Content Type	Text
Resource Type	Article

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