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arXiv 2102.04810math.STmath.PRstat.TH
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高频下高斯过程二阶矩估计的Berry-Esseen界

Berry-Esseen bounds of second moment estimators for Gaussian processes observed at high frequency

Soukaina Douissi, Khalifa Es-Sebaiy, George Kerchev, Ivan Nourdin

摘要:

设$Z:=\{Z_t,t\geq0\}$为平稳高斯过程。本文研究了$\mathbb{E}[Z_0^2]$的两个估计,即$\widehat{f}_T(Z):= \frac{1}{T} \int_{0}^{T} Z_{t}^{2}dt$和$\widetilde{f}_n(Z) :=\frac{1}{n} \sum_{i =1}^{n} Z_{t_{i}}^{2}$,其中$ t_{i} = i Δ_{n}$,$ i=0,1,\ldots, n $,$Δ_{n}\rightarrow 0$和$ T_{n} := n Δ_{n}\rightarrow \infty$ .我们证明了这两个估计是强相合的,并建立了涉及$\widehat{f}_T(Z)$和$\widetilde{f}_n(Z)$的中心极限定理的Berry-Esseen界。我们将这些结果应用于渐近平稳高斯过程,并估计高斯Ornstein-Uhlenbeck过程的漂移参数。

英文摘要:

Let $Z:=\{Z_t,t\geq0\}$ be a stationary Gaussian process. We study two estimators of $\mathbb{E}[Z_0^2]$, namely $\widehat{f}_T(Z):= \frac{1}{T} \int_{0}^{T} Z_{t}^{2}dt$, and $\widetilde{f}_n(Z) :=\frac{1}{n} \sum_{i =1}^{n} Z_{t_{i}}^{2}$, where $ t_{i} = i Δ_{n}$, $ i=0,1,\ldots, n $, $Δ_{n}\rightarrow 0$ and $ T_{n} := n Δ_{n}\rightarrow \infty$. We prove that the two estimators are strongly consistent and establish Berry-Esseen bounds for a central limit theorem involving $\widehat{f}_T(Z)$ and $\widetilde{f}_n(Z)$. We apply these results to asymptotically stationary Gaussian processes and estimate the drift parameter for Gaussian Ornstein-Uhlenbeck processes.

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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