Accurate frequency-domain macromodels are becoming increasingly important for the design, study and optimization of complex physical systems. These macromodels approximate the complex frequency-dependent input-output behaviour of broadband multi-port systems in the frequency domain by rational functions [28]. Unfortunately, due to the complexity of the physical systems under study and the dense discretization required for accurately modelling their behaviour, the rational or state-space macromodels may lead to unmanageable levels of storage and computational requirements. Therefore, Model Order Reduction (MOR) methods can be applied to build a model of reduced size, which captures the dynamics of the larger model as closely as possible.
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Deschrijver, D., Dhaene, T. (2008). Data-Driven Model Order Reduction Using Orthonormal Vector Fitting. In: Schilders, W.H.A., van der Vorst, H.A., Rommes, J. (eds) Model Order Reduction: Theory, Research Aspects and Applications. Mathematics in Industry, vol 13. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-78841-6_16
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