1∕ f β noise for scale-invariant processes: how long you wait matters

Nava Leibovich, Eli Barkai

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We study the power spectrum which is estimated from a nonstationary signal. In particular we examine the case when the signal is observed in a measurement time window [tw, tw + tm], namely the observation started after a waiting time tw, and tm is the measurement duration. We introduce a generalized aging Wiener–Khinchin theorem which relates between the spectrum and the time- and ensemble-averaged correlation functions for arbitrary tm and tw. Furthermore we provide a general relation between the non-analytical behavior of the scale-invariant correlation function and the aging 1∕fβ noise. We illustrate our general results with two-state renewal models with sojourn times’ distributions having a broad tail.

Original languageEnglish
Article number229
JournalEuropean Physical Journal B
Issue number11
StatePublished - 1 Nov 2017

Bibliographical note

Publisher Copyright:
© 2017, EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature.


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