Time-domain UWB transmission model for three-dimensional environments with low-loss obstacles

In this work, time-domain (TD) solution is presented for ultra wideband (UWB) transmission through three dimensional (3-D) scenarios made up of low-loss dielectric materials. Considering soft and hard polarizations, propagation through different structures like building and wedge is analyzed with arbitrary position of the receiver (Rx). Further the presented TD solution for transmission has been compared with TD UWB diffraction; single diffraction, double diffraction and diffraction followed by reflection when both transmitter (Tx) and Rx are in a plane normal to the edge. A detailed analysis of attenuation and distortion of transmitted and diffracted pulse waveforms through lossy obstacles is presented. It is observed that transmitted pulse waveform suffers comparatively lesser attenuation and distortion in shape as compared to diffracted pulse for low-loss obstacles. The TD results have been validated with the inverse fast Fourier transform (IFFT) of the corresponding exact frequency-domain (FD) results.