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arXiv 1408.4502math.PR
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时变分数布朗运动的关联结构

Correlation structure of time-changed fractional Brownian motion

Jebessa B. Mijena

摘要:

分数布朗运动(fBM)是一个具有平稳增量的中心自相似高斯过程,它依赖于一个称为Hurst指数的参数$H \in (0, 1)$。时变过程的建模通常需要了解其二阶特性,如协方差函数。本文给出了时变分数布朗运动的关联结构的显式表达式。讨论了几个在应用中有用的例子。

英文摘要:

Fractional Brownian motion (fBm) is a centered self-similar Gaussian process with stationary increments, which depends on a parameter $H \in (0, 1)$ called the Hurst index. The use of time-changed processes in modeling often requires the knowledge of their second order properties such as covariance function. This paper provides the explicit expression for the correlation structure for time-changed fractional Brownian motion. Several examples useful in applications are discussed.

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