UWB pulse distortion in the channel containing cylindrical hill

In this paper we use the uniform geometrical theory of diffraction in time domain to model distortion of a particular UWB pulse in the channel containing hill. The distortion of an UWB pulse is difficult to model using statistical measurements, therefore it is better to do this in a deterministic way, as it is in the case of the UTD. UTD related to electromagnetic wave scattering by convex surfaces in frequency domain was presented in literature. Basing on this theory we derive in this paper a 2-ray model of the channel containing hill by developing its transfer function H(f) and transforming it into the impulse response of the channel. Then using this impulse response of the channel we examine distortion of a particular UWB pulse. The time domain solutions are in very good agreement with the inverse fast Fourier transform (IFFT) of H(f) - based frequency domain solutions.