Confidence Estimation of Autoregressive Parameters Based on Noisy Data
2021
We consider the problem of estimating the parameters of an autoregressive process based
on observations with additive noise. A sequential method has been developed for constructing a
fixed-size confidence domain with a given confidence factor for a vector of unknown parameters
based on a finite sample. Formulas are obtained for the duration of a procedure that achieves the
required performance of estimates of unknown parameters in the case of Gaussian noise.
Confidence parameter estimates are constructed using a special sequential modification of the
classic Yule–Walker estimates; this permits one to estimate the confidence factor for small and
moderate sample sizes. The results of numerical modeling of the proposed estimates are presented
and compared with the Yule–Walker estimates using the example of confidence estimation of
spectral density.
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