TD Analysis of Transmission through a Building with Multilayer Wall Structure for UWB Signals

In this work the time-domain (TD) solution for transmission through a building with multilayer wall structure has been presented. The layers of the walls are considered with different thickness and dielectric materials. The exact frequency-domain (FD) formulation for transmitted field at the receiver (Rx) has been simplified under the condition of low-loss assumption and converted to TD formulation using inverse Laplace transform. The TD results have been validated with the inverse fast Fourier transform (IFFT) of the corresponding exact FD results. Further the computational efficiency of both the methods has been compared.