New approach to the estimation of the input matrices in subspace identification algorithms

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Abstract

In this paper we provide a different way to estimate matrices B and D, in subspace identification algorithms. The starting point was the method proposed by Van Overschee and De Moor [10] - the only one applying subspace ideas to the estimation of those matrices. We have derived new (and simpler) expressions and we found that the method proposed by Van Overschee and De Moor [10] can be rewritten as a weighted least squares problem, involving the future outputs and inputs.

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Delgado, C. J. M., Dos Santos, P. L., & De Carvalho, J. L. M. (2004). New approach to the estimation of the input matrices in subspace identification algorithms. In Proceedings of the IEEE Conference on Decision and Control (Vol. 2, pp. 2207–2212). Institute of Electrical and Electronics Engineers Inc. https://doi.org/10.1109/cdc.2004.1430376

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