Ultra-wideband signal transmission according to European regulations and typical pulses

According to requirements of European Telecommunications Standards Institute regarding power spectral density mask a wavelet is the most promising radiated ultra-wideband (UWB) pulse. This paper discusses mathematical models as well as time and frequency analysis of the major UWB signals. Despite of narrowband systems, where the pulse shape distortion by the antenna is negligible, there is a significant waveform distortion related to radiation direction of antenna. The simulation software allowed to present several short duration pulses radiated by designed planar antenna which operates in frequency band 6-8.5 GHz. System performance can be improved by applying wavelets which are limited by a Gaussian envelope.