The maximum of the periodogram of Hilbert space valued time series

The maximum of the periodogram of Hilbert space valued time series

We are interested to detect periodic signals in Hilbert space valued time series when the length of the period is unknown. A natural test statistic is the maximum Hilbert-Schmidt norm of the periodogram operator over all fundamental frequencies. In this paper we analyze the asymptotic distribution o...

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Hauptverfasser: Cerovecki, Clément, Characiejus, Vaidotas, Hörmann, Siegfried
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Characiejus, Vaidotas
Hörmann, Siegfried
description We are interested to detect periodic signals in Hilbert space valued time series when the length of the period is unknown. A natural test statistic is the maximum Hilbert-Schmidt norm of the periodogram operator over all fundamental frequencies. In this paper we analyze the asymptotic distribution of this test statistic. We consider the case where the noise variables are independent and then generalize our results to functional linear processes. Details for implementing the test are provided for the class of functional autoregressive processes. We illustrate the usefulness of our approach by examining air quality data from Graz, Austria. The accuracy of the asymptotic theory in finite samples is evaluated in a simulation experiment.
doi_str_mv 10.48550/arxiv.2007.02188
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title The maximum of the periodogram of Hilbert space valued time series
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