A mean squared error criterion for time series data windows
时间序列数据窗的均方误差准则AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接讨论时间序列周期图、谱估计、自回归过程及数据窗选择,对应时间序列方法。
时间序列数据窗的均方误差准则AI 解读 ↓
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A periodogram mean integrated squared error criterion is proposed for assessing the performance of time series data windows, or tapers. The criterion is evaluated numerically for several known autoregressive processes to determine the optimal amount of tapering in Tukey's cosine window. It is found that tapering can be extremely beneficial if the spectrum contains sharp peaks. Also, in all cases studied, the optimal number of points tapered converges to a constant as the sample size increases. This result is at odds with the traditional strategy of tapering a fixed percentage of the data. Finally, a method is proposed for estimating the optimal degree of tapering on the basis of data from an unknown process. Some Monte Carlo evidence is presented to demonstrate the effectiveness of the proposed estimation technique.