arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1111.1965math.STstat.TH
收藏

稳健的谱分析

Robust Spectral Analysis

Andreas Hagemann

摘要:

在本文中,我介绍了分位数谱密度,总结了时间序列在其整个分布的周期性行为,通过分析分位数交叉的周期。这种方法可以捕获周期对时间序列分布的影响的系统变化,并且在自协方差函数不能准确捕获相关结构的情况下允许鲁棒的谱估计和推断。我研究的统计性质的分位数谱估计在一个大类的非线性时间序列模型,并讨论在固定和跨所有频率的推断。蒙特卡罗实验表明,当标准假设被违反时,分位数谱分析优于经典方法。

英文摘要:

In this paper I introduce quantile spectral densities that summarize the cyclical behavior of time series across their whole distribution by analyzing periodicities in quantile crossings. This approach can capture systematic changes in the impact of cycles on the distribution of a time series and allows robust spectral estimation and inference in situations where the dependence structure is not accurately captured by the auto-covariance function. I study the statistical properties of quantile spectral estimators in a large class of nonlinear time series models and discuss inference both at fixed and across all frequencies. Monte Carlo experiments illustrate the advantages of quantile spectral analysis over classical methods when standard assumptions are violated.

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。

↑