A test for the absence of aliasing or local white noise in locally stationary wavelet time series
A test for the absence of aliasing or local white noise in locally stationary wavelet time series
复制标题
局部平稳小波时间序列中不存在混叠或局部白噪声的检验
DOI:
10.1093/biomet/asy040
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发表时间:
2018
期刊:
影响因子:
2.7
通讯作者:
Eckley I
中科院分区:
文献类型:
--
作者:
Eckley I
Aliasing is often overlooked in time series analysis but can seriously distort the spectrum, the autocovariance and their estimates. We show that dyadic subsampling of a locally stationary wavelet process, which can cause aliasing, results in a process that is the sum of asymptotic white noise and another locally stationary wavelet process with a modified spectrum. We develop a test for the absence of aliasing in a locally stationary wavelet series at a fixed location, and illustrate its application on simulated data and a wind energy time series. A useful by-product is a new test for local white noise. The tests are robust with respect to model misspecification in that the analysis and synthesis wavelets do not need to be identical. Hence, in principle, the tests work irrespective of which wavelet is used to analyse the time series, although in practice there is a trade-off between increasing statistical power and time localization of the test.
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影响因子:
3.7
作者:
M. Hinich;M. Wolinsky
通讯作者:
M. Wolinsky
影响因子:
5.4
作者:
M. Hinich;H. Messer
通讯作者:
H. Messer
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Antonis A. Michis
通讯作者:
Antonis A. Michis
影响因子:
2.2
作者:
I. Eckley;G. Nason
通讯作者:
G. Nason
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Rebecca Killick;I. Eckley;P. Jonathan
通讯作者:
P. Jonathan