Statistical inference of spectral estimation for continuous-time MA processes with finite second moments |
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Authors: | V Fasen |
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Institution: | 1. Inst. of Stochastics, Karlsruhe Inst. of Technology, Karlsruhe, Germany
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Abstract: | In this paper we investigate a continuous-time MA (moving average) process (X t ) t≥0 sampled at an equally spaced time grid {Δ,2Δ, …, nΔ}, where the grid distance Δ > 0 is fixed and n denotes the number of observations, in the frequency domain. We derive for the process (X kΔ) k∈? with finite second moments the asymptotic behavior of the periodogram and of the lag-window spectral density estimator. The periodogram is not a consistent estimator for the spectral density of (X kΔ) k∈?. Different periodogram frequencies are asymptotically independent and exponentially distributed like for ARMA processes in discrete time. This result is basic for frequency bootstraps. In contrast, the lag-window spectral density estimator is a consistent estimator for the spectral density of (X kΔ) k∈? and moreover, it is asymptotically normally distributed. |
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