Rational representation in spectrum conjugate domain for parameters determination of reflecting structures

An opportunity of use of rational representation in the spectrum conjugate domain for determination of parameters of reflecting structures using measured frequency reflection characteristics has been considered. An opportunity of use of the linear approaches for spectral data approximation by unipolar function and use of rational interpolation of the spectral data with the purpose of acceleration of a procedure of parameter determination of the additive exponential model has been considered. The properties of these methods and their comparison with analogous properties of other methods are presented.