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Approximation of the fractional Brownian sheet VIA Ornstein-Uhlenbeck sheet

Published online by Cambridge University Press:  31 March 2007

Laure Coutin
Affiliation:
Université Paul Sabatier, 31062 Toulouse cedex 04; Laure.Coutin@lsp.ups-tlse.fr; Monique.Pontier@lsp.ups-tlse.fr
Monique Pontier
Affiliation:
Université Paul Sabatier, 31062 Toulouse cedex 04; Laure.Coutin@lsp.ups-tlse.fr; Monique.Pontier@lsp.ups-tlse.fr
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Abstract

A stochastic “Fubini” lemma and an approximation theorem for integrals on the plane are used to produce a simulation algorithm for an anisotropic fractional Brownian sheet. The convergence rate is given. These results are valuable for any value of the Hurst parameters $(\alpha_1,\alpha_2)\in ]0,1[^2,\alpha_i\neq\frac{1}{2}.$ Finally, the approximation process is iterative on the quarter plane $\mathbb {R}_+^2.$ A sample of such simulations can be used to test estimators of the parameters αi,i = 1,2.

Type
Research Article
Copyright
© EDP Sciences, SMAI, 2007

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