Delay Rational Macromodelling of Noisy Tabulated Frequency Responses

This paper presents a scheme to fit delay rational macromodels of electrically long electric networks from noisy frequency domain tabulated data. Delay regions of the tabulated data are estimated by evaluating the energy of the frequency responses over time. Then, the frequency responses of each delay term are obtained as a rational approximation using a vector fitting-instrumental variable technique. The combination of rational approximations of each delay region provides a delay rational macromodel for the entire network.