Discrete estimators of characteristics for periodically correlated time series |
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Affiliation: | 1. Department of Mathematics, A.K.P.C. Mahavidyalaya, Bengai, Hooghly 712 611, India;2. Department of Mathematics, Babeş-Bolyai University, 400084 Cluj-Napoca, Romania |
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Abstract: | Results of an investigation of the characteristic estimator properties for periodically correlated time series obtained on the basis of finite data length are given. The formulae for the bias and variance of the estimators for mean and covariance function Fourier coefficients are found. The conditions for the choice of sampling interval value, for which aliasing effects do not appear, are obtained. The interpolation formulae for the mean and covariance function estimates are derived. The dependencies of the statistical characteristics of the estimators on sampling interval and sample size for modulated signals are analyzed. |
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Keywords: | Periodically correlated time series Mean Covariance Fourier coefficients Discrete estimators Aliasing |
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