Estimation of ordinal pattern probabilities in Gaussian processes with stationary increments
نویسندگان
چکیده
The investigation of ordinal pattern distributions is a novel approach to quantifying the complexity of time series and detecting changes in the underlying dynamics. Being fast and robust against monotone distortions, this method is particularly well-suited for the analysis of long biophysical time series where the exact calibration of the measurement device is unknown. In this paper we investigate properties of the estimators of ordinal pattern probabilities in discrete-time Gaussian processes with stationary increments. We show that better estimators than the “sample frequency estimators” are available because the considered processes are subject to certain statistical symmetries. Furthermore, we establish sufficient conditions for the estimators to be strongly consistent and asymptotically normal. As an application, we discuss the Zero-Crossing (ZC) estimator of the Hurst parameter in fractional Brownian motion and compare its performance to that of a similar “metric” estimator by simulation studies.
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عنوان ژورنال:
- Computational Statistics & Data Analysis
دوره 55 شماره
صفحات -
تاریخ انتشار 2011