caa a22 4500 606198180 CHVBK 20210128100932.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00348-015-1922-x doi (NATIONALLICENCE)springer-10.1007/s00348-015-1922-x Reduction of noise and bias in randomly sampled power spectra [Elektronische Daten] [Preben Buchhave, Clara Velte] We consider the origin of noise and distortion in power spectral estimates of randomly sampled data, specifically velocity data measured with a burst-mode laser Doppler anemometer. The analysis guides us to new ways of reducing noise and removing spectral bias, e.g., distortions caused by modifications of the ideal Poisson sample rate caused by dead time effects and correlations between velocity and sample rate. The noise and dead time effects for finite records are shown to tend to previous results for infinite time records and ensemble averages. For finite records, we show that the measured sampling function can be used to correct the spectra for noise and dead time effects by a deconvolution process. We also describe a novel version of a power spectral estimator based on a fast slotted autocovariance algorithm. Springer-Verlag Berlin Heidelberg, 2015 Buchhave Preben Intarsia Optics, Birkerød, Denmark aut Velte Clara Technical University of Denmark, Lyngby, Denmark aut Experiments in Fluids Springer Berlin Heidelberg 56/4(2015-04-01), 1-17 0723-4864 56:4<1 2015 56 348 https://doi.org/10.1007/s00348-015-1922-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-1922-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Buchhave Preben Intarsia Optics, Birkerød, Denmark aut NATIONALLICENCE 700 1- Velte Clara Technical University of Denmark, Lyngby, Denmark aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/4(2015-04-01), 1-17 0723-4864 56:4<1 2015 56 348