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Multidimensional Systems: BIBO Stability Test Based on Functional Schur Coefficients

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2 Author(s)
Serban, I. ; Univ. Bordeaux, Talence ; Najim, Mohamed

This paper presents a multidimensional extension of the Schur-Cohn algorithm for testing BIBO stability in N variables. This new method only needs a unique condition to be checked, as an alternative to the set of conditions of the well-known Huang-Jury-Anderson stability test. The proposed algorithm is based on a generalization of the Schur coefficients recently obtained by the authors. In the two-variable case a simplification to the Sturm algorithm is presented, which can also be used in the case of a polynomial with complex coefficients. This approach is illustrated on several numerical examples.

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Signal Processing, IEEE Transactions on  (Volume:55 ,  Issue: 11 )