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Minimum order input-output equation for linear time-varying digital filters

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3 Author(s)
Cishen Zhang ; Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia ; Song Wang ; Yu Fan Zheng

The objective of this paper is to obtain minimum order input-output equations for a class of linear time-varying digital filters in state equation with constant dimension state vector. It is shown that the minimum order of the input-output equation may not be identical to the dimension of the state vector and there exists a nonunique solution for the minimum order input-output equation.

Published in:

Signal Processing Letters, IEEE  (Volume:5 ,  Issue: 7 )