Abstract
Ultra-wideband technology shows promise for precision ranging due to its fine time resolution to resolve multipath fading and the presence of lower frequencies in the baseband to penetrate walls.While a concerted effort has been conducted in the extensive modeling of the indoor UWB channel in recent years, to our knowledge only two papers have reported ranging performance, but for limited range and fixed bandwidth and center frequency. In principle, boosting power can guarantee connectivity between transmitter and receiver, but not precision due to the distorting effects of walls and other objects in the direct path. In order to gauge the limits of UWB ranging, we carry out 5000 measurements up to an unprecedented 45m in non-line-of-sight conditions in four separate buildings with dominant wall material varying from sheet rock to steel. In addition, we report performance for varying bandwidth and center frequency of the system.
Highlights
Ultra-wideband (UWB) signals are characterized by a bandwidth greater than 500 MHz or one exceeding 20% of the center frequency of radiation [1, 2]
Irahhauten provides a comprehensive overview of indoor UWB measurements in the time and frequency domains [3]
The measurement campaign was conducted in four separate buildings on the NIST campus in Gaitherburg, Maryland each constructed from a dominant wall material varying from sheet rock to steel
Summary
Ultra-wideband (UWB) signals are characterized by a bandwidth greater than 500 MHz or one exceeding 20% of the center frequency of radiation [1, 2]. Such technology shows promise for indoor ranging due to its fine time resolution to resolve multipath fading and the presence of lower frequencies in the baseband to penetrate walls. The most comprehensive of the models proposed by Molisch includes frequency fading and clusters in the multipath profile The latter gathers measurements conducted by separate parties with similar parameters to investigate three indoor environments, and two outdoor environments and the body area network
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