Reliable LDA-spectra by resampling and ARMA-modeling
- 1 January 1999
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 48 (6) , 1117-1121
- https://doi.org/10.1109/19.816124
Abstract
Laser-Doppler Anemometry (LDA) is used to mea- sure the velocity of gases and liquids with observations ir- regularly spaced in time. Equidistant resampling turns out to be better than slotting techniques. After resampling, two ways of spectral estimation are compared. The first estimate is a windowed periodogram and the second is the spectrum of a time series model. That is an estimated autoregressive moving average (ARMA) process whose orders are automatically selected from the data with an objective statistical criterion. Typically, the ARMA spectrum is better than the best windowed periodogram.Keywords
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