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Spectral Factorization of Periodically Correlated MA(1) Processes

Published online by Cambridge University Press:  14 July 2016

Mohamed Bentarzi*
Affiliation:
Université des Sciences et Techniques d'Alger
Marc Hallin*
Affiliation:
Université Libre de Bruxelles
*
Postal address: Institut de Mathématiques, Université des Sciences et Techniques d'Alger, B.P. 9 Dar El Beida, Alger, Algeria
∗∗Postal address: Institut de Statistique, Université Libre de Bruxelles, cp 210, B1050 Bruxelles, Belgium

Abstract

The spectral factorization problem, i.e. the problem of obtaining all possible MA representations of a process with given autocovariance function, is considered for univariate, d-periodic MA(1) (equivalently, 1-dependent in the second-order sense) processes. The solutions are provided explicitly, and their invertibility properties are investigated. A characterization, in terms of their autocovariance functions, of non-invertible d-periodic 1-dependent processes, extending to the periodic case the traditional unit root condition, is provided.

Type
Research Papers
Copyright
Copyright © Applied Probability Trust 1998 

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