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• W2104261629 endingPage "668" @default.
• W2104261629 startingPage "655" @default.
• W2104261629 abstract "In many branches of science, particularly astronomy and geophysics, power spectra of the form f/sup -/spl beta//, where /spl beta/ is a positive power-law exponent, are common. This form of spectrum is characterized by a sharp increase in the spectral density as the frequency f decreases toward zero. A power spectrum analysis method that has proven very powerful wherever the spectrum of interest is detailed and/or varies rapidly with a large dynamic range is the multitaper method. With multitaper spectral estimation, a set of orthogonal tapers are applied to the time series, and the resulting direct spectral estimators (eigenspectra) are averaged, thus, reducing the variance. One class of processes with spectra of the power-law type are fractionally differenced Gaussian processes that are stationary and can model certain types of long-range persistence. Spectral decay f/sup -/spl beta// can be modeled for 0</spl beta/<1. Estimation of the spectral slope parameter by regression on multitaper spectral ordinates is examined for this class of processes. It is shown that multitapering, or using sine or Slepian tapers, produces much better results than using the periodogram and is attractive compared with other competing methods. The technique is applied to a geophysical estimation problem." @default.
• W2104261629 created "2016-06-24" @default.
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• W2104261629 date "1998-03-01" @default.
• W2104261629 modified "2023-10-03" @default.
• W2104261629 title "Multitaper spectral estimation of power law processes" @default.
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• W2104261629 doi "https://doi.org/10.1109/78.661333" @default.
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