Abstract
Ultra-wideband (UWB) communication systems are quite different from conventional ones due to many of the special characteristics of the underlying channels. New channel models such as IEEE 802.15.3a and IEEE 802.15.4a channel models are proposed to match the special characteristics. The specialities lead to different problems on the performance analysis over UWB channels. In addition, systems such as the multiband orthogonal frequency division multiplexing (MB-OFDM) system have been proposed for UWB communications; yet practical analysis for the MB-OFDM system over generic UWB channels is still rare in the literature. In this thesis, by the aid of the extended density function, the average effect of the unique random arrivals in generic UWB channels is first derived. An exact signal-to- interference-plus-noise ratio (SINR) analysis of the MB-OFDM system over UWB channels under practical assumptions is then provided. Obtained analytical results are later verified by computer simulations. Finally, some discussions on the selection of system parameters based on the SINR analysis are given.