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arXiv 0902.1403math.STstat.TH
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连续时间自回归分数积分滑动平均过程

On continuous-time autoregressive fractionally integrated moving average processes

Henghsiu Tsai

摘要:

本文考虑了一个连续时间自回归分数积分滑动平均(CARFIMA)模型,它被定义为由标准分数布朗运动驱动的随机微分方程的平稳解.与离散时间ARFIMA模型一样,CARFIMA模型也适用于研究具有短记忆、长记忆和反持续性的时间序列。我们研究了模型的平稳性,并推导出其协方差结构。此外,我们还导出了平稳CARFIMA过程的谱密度函数。

英文摘要:

In this paper, we consider a continuous-time autoregressive fractionally integrated moving average (CARFIMA) model, which is defined as the stationary solution of a stochastic differential equation driven by a standard fractional Brownian motion. Like the discrete-time ARFIMA model, the CARFIMA model is useful for studying time series with short memory, long memory and antipersistence. We investigate the stationarity of the model and derive its covariance structure. In addition, we derive the spectral density function of a stationary CARFIMA process.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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