NDLI: An improved sample-and-hold reconstruction procedure for estimation of power spectra from LDA data

Content Provider	Springer Nature Link
Author	Simon, Laurent Fitzpatrick, John
Copyright Year	2004
Abstract	Techniques for deriving the auto or power spectrum (PSD) of turbulence from laser Doppler anemometry (LDA) measurements are reviewed briefly. The low pass filter and step noise errors associated with the sample-and-hold process are considered and a discrete version of the low pass filter for the resampled signal is derived. This is then used to develop a procedure by which the PSD estimates obtained from sample and hold measurements can be corrected. The application of the procedures is examined using simulated data and the results show that the frequency range of the analysis can be extended beyond the Nyquist frequency based on the mean sample rate. The results are shown to be comparable to those obtained using the method of Nobach et al. (1998) but the new procedures are more straightforward to implement. The technique is then used to determine the PSD of real LDA data and the results are compared with those from a hot wire anemometer.
Starting Page	272
Ending Page	280
Page Count	9
File Format	PDF
ISSN	07234864
Journal	Experiments in Fluids
Volume Number	37
Issue Number	2
e-ISSN	14321114
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-04-27
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	LDA Power spectra estimation Sample-and-hold
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanics of Materials Computational Mechanics

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