REDUCING NUMERICAL LIMITATIONS IN TIME-REVERSALSIMULATIONS

摘要

The paper reports on practical problems and limitations ofinverse simulations using the time-domain TransmissionLine Modelling, TLM, method. Two primary sources oferror in a time-reversal simulation, namely finite run-timeand evanescent wave decay, are analysed. The paper alsoreports on the consequences for the time reversaltechnique of using Prony series to predict future fields inorder to reduce the runtime of the forward simulation andits memory requirements. The error caused by decay ofthe evanescent modes is quantified in terms of thepropagation length and given accuracy. All issues areanalysed on an example of a two-dimensional reversalcavity and source reconstruction.