Ultrawideband Communications - An Overview
نویسنده
چکیده
This paper presents an overview of ultrawideband (UWB) communications systems, i.e., systems with very large relative and/or absolute bandwidth. The large bandwidth and low power spectral density mandated for UWB systems allows to use them as overlay over existing (legacy) systems, i.e., they can be used in the same frequency range as existing systems without causing undue interference. We also describe the most common types of UWB systems, including time-hopping impulse radio, frequency hopping, and multiband-OFDM. We furthermore discuss interference aspects and the peculiarities of UWB propagation channels.
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