Abstract
We consider the order reduction problem for single-input/ single-output (SISO) nonminimum phase linear stochastic systems. First, the realization of SISO state-space models for stationary processes generated by time-invariant finite-order, possibly nonminimum phase, linear systems is considered. It is shown that in order to obtain a “correct” phase realization, it is necessary to consider some higher-order statistics of the process in addition to the usual second-order statistics. A model in the controllable canonical form is obtained by utilizing a partial set of second- and fourth- order cumulant functions of the process. Next, model approximation by order reduction is defined in this framework. An example is presented to illustrate the proposed method.
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© 1986 Kluwer Academic Publishers, Boston
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Tugnait, J.K. (1986). Realization and Reduction of S.I.S.O. Nonminimum Phase Stochastic Systems. In: Desai, U.B. (eds) Modelling and Application of Stochastic Processes. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2267-2_8
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DOI: https://doi.org/10.1007/978-1-4613-2267-2_8
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