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A model-free noise removal for the interpolation method of correlation and spectral estimation from laser Doppler data

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Abstract

A procedure to estimate and remove the contribution of data noise to the correlation function and the power spectral density calculated from laser Doppler data with the interpolation method is introduced. In comparison with earlier approaches, the new procedure is model free and, therefore, more objective. The new procedure is proven based on experimental data taken with a laser Doppler system, where the power spectral density obtained with the interpolation method is compared directly to data from a hot-wire reference measurement.

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Acknowledgments

The work of Palle Gjelstrup, Finn E. Jørgensen (Dantec Dynamics) and Knud Erik Meyer (Danmarks Tekniske Universitet) performing the experiments and providing the data is gratefully acknowledged.

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Correspondence to Holger Nobach.

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Nobach, H. A model-free noise removal for the interpolation method of correlation and spectral estimation from laser Doppler data. Exp Fluids 56, 100 (2015). https://doi.org/10.1007/s00348-015-1975-x

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