Abstract
Ultra-wideband (UWB) technology for communications and radar has been a topic of research since the early 1960s, but it is only recently that the field has advanced very rapidly. The primary reason for this advancement is the availability of high-speed switching semiconductor device technology. The UWB radio frequency (RF) pulse or waveform is defined by its large fractional bandwidth. The large bandwidth in UWB pulses provide frequency diversity and therefore reduce fading from multipath reflections. There is a significant interest in the UWB community in the generation of UWB pulses as the need for low-power cost-effective UWB pulsers is high. In spite of the attenuation and distortion in harsh environments, the receiver design with UWB is still possible, as it is easier to design a correlation receiver when the signals are wideband. Although UWB communications is primarily a short-distance, high-bandwidth technology, UWB communications can be used also for very long distance communications if the data bandwidth is reduced.
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