Adaptive smoothing of the log-spectrum with multiple tapering
نویسنده
چکیده
A hybrid estimator of the log-spectral density of a stationary time series is proposed. First, a multiple taper estimate is performed, followed by kernel smoothing the log-multiple taper estimate. This procedure reduces the expected mean square error by (π 2 4) 4/5 over simply smoothing the log tapered periodogram. A data adaptive implementation of a variable bandwidth kernel smoother is given.
منابع مشابه
A new adaptive exponential smoothing method for non-stationary time series with level shifts
Simple exponential smoothing (SES) methods are the most commonly used methods in forecasting and time series analysis. However, they are generally insensitive to non-stationary structural events such as level shifts, ramp shifts, and spikes or impulses. Similar to that of outliers in stationary time series, these non-stationary events will lead to increased level of errors in the forecasting pr...
متن کاملBayesian Decision Theoretic Scale-adaptive Estimation of a Log-spectral Density
The problem of estimating the log-spectrum of a stationary Gaussian time series by Bayesianly induced shrinkage of empirical wavelet coefficients is studied. A model in the wavelet domain that accounts for distributional properties of the log-periodogram at levels of fine detail and approximate normality at coarse levels in the wavelet decomposition, is proposed. The smoothing procedure, called...
متن کاملAn Adaptive Physics-Based Method for the Solution of One-Dimensional Wave Motion Problems
In this paper, an adaptive physics-based method is developed for solving wave motion problems in one dimension (i.e., wave propagation in strings, rods and beams). The solution of the problem includes two main parts. In the first part, after discretization of the domain, a physics-based method is developed considering the conservation of mass and the balance of momentum. In the second part, ada...
متن کاملSpectral Estimation of Plasma Fluctuations I: Comparison of Methods
The relative root mean squared errors (RMSE) of nonparametric methods for spectral estimation is compared for microwave scattering data of plasma fluctuations. These methods reduce the variance of the periodogram estimate by averaging the spectrum over a frequency bandwidth. As the bandwidth increases, the variance decreases, but the bias error increases. The plasma spectra vary by over four or...
متن کاملرابطه بین تنیدگی و سبکهای مقابلهای مادران با رفتارهای سازشی کودکان با اختلال طیف اتیسم
Background: Children with autism spectrum face many problems with adaptive behavior and consequently parents are faced with more mental health problems. The goal of this study is to investigate the relationship between stress and coping styles of mothers and autism spectrum disorder with adaptive behavior in children. Method: The research design is the correlation-descriptive. The study populat...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- IEEE Trans. Signal Processing
دوره 44 شماره
صفحات -
تاریخ انتشار 1996