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On the parameters estimation of continuous-time ARMA processes from noisy observations

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2 Author(s)
Dembo, A. ; Technion-Israel Institute of Technology, Haifa, Israel ; Zeitouni, O.

Recently, an iterative algorithm has been presented for estimating the parameters of partially observed continuous-time processes [1]. In this note we concentrate on continuous-time ARMA processes observed in white noise. A maximum a-posteriori (MAP) estimator is defined for the trajectory of the parameters' random process. This approach enables the MAP estimation of randomly slowly varying parameters, and extends the conventional treatment of time-invariant parameters. The iterative algorithm derived for the MAP estimation, increases the posterior probability of the parameters in each iteration, and converges to a stationary point of the posterior probability functional. Each iteration involves a standard linear smoother followed by a finite-dimensional linear system, and thus is easily implemented.

Published in:

Automatic Control, IEEE Transactions on  (Volume:32 ,  Issue: 4 )

Date of Publication:

Apr 1987

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