Simulation of broadband transient signals in frequency-domain using impedance parameters

摘要

In order to design and simulate broadband communication systems like Ethernet, accurate models up to 375 MHz and efficient simulations are necessary. This paper provides an approach to model analog two-port systems using impedance parameters purely in the digital domain. The twisted-pair copper line is modelled based on frequency dependent impedance parameters gained from FEM (finite element method) field solver software. The necessary steps to use the impedance parameters for frequency-domain (FD) simulation of transient signals are given. A way to simulate very long input signals using the overlap-add method is shown. Two examples for simulating broadband transient signals using this approach show the utility.