Mathematics – Statistics Theory
Scientific paper
2008-11-17
Stochastic Analysis and Applications (2010) 1-25
Mathematics
Statistics Theory
Scientific paper
10.1016/j.spa.2010.08.003
By using chaos expansion into multiple stochastic integrals, we make a wavelet analysis of two self-similar stochastic processes: the fractional Brownian motion and the Rosenblatt process. We study the asymptotic behavior of the statistic based on the wavelet coefficients of these processes. Basically, when applied to a non-Gaussian process (such as the Rosenblatt process) this statistic satisfies a non-central limit theorem even when we increase the number of vanishing moments of the wavelet function. We apply our limit theorems to construct estimators for the self-similarity index and we illustrate our results by simulations.
Bardet Jean-Marc
Tudor Ciprian
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