Abstract
Counting statistics in the form of the variance-time curve provides an alternative to spectral analysis for point processes exhibiting 1/f β-fluctuations, such as the heart beat. However, this is true only for β<1. Here, the case of general β is considered. To that end, the mathematical relation between the variance-time curve and power spectral density in the presence of 1/f β-noise is worked out in detail. A modified version of the variance-time curve is presented, which allows us to deal also with the case β⩾1. Some applications to the analysis of heart rate variability are given.
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Supported by the Wilhelm Sander-Stiftung, Munich
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Scharf, R., Meesmann, M., Boese, J. et al. General relation between variance-time curve and power spectral density for point processes exhibiting 1/f β-fluctuations, with special reference to heart rate variability. Biol. Cybern. 73, 255–263 (1995). https://doi.org/10.1007/BF00201427
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DOI: https://doi.org/10.1007/BF00201427