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A robust and accurate positioning solution is required to increase the safety in GPS-denied environments. Although there is a lot of available research in this area, little has been done for confined environments such as tunnels. Therefore, we organized a measurement campaign in a basement tunnel of Linköping university, in which we obtained ultra-wideband (UWB) complex impulse responses for line-of-sight...
This manuscript deals with the modeling, analysis, and measurement of a small scale fading (SSF) mobile radio channel. The physics of SSF are first reviewed to reveal the generating mechanisms of channel selectivity. A stochastic channel model is then derived as a function of time, antenna array displacement and frequency, which falls in the category of tapped delay line model. Specifically, the taps...
Measurements of the 60 GHz ultra-wideband (UWB) indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The UWB channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and for each location the receiver is moved over a grid...
In this paper the complete state of the art of UWB is presented, ranging from the theory of the wireless channel, measurements, channel modeling the use of UWB in multiple antenna systems. This work presents preliminary results of a measurement campaign accomplished in the Technical University of Cartagena. Measurements were performed from 2 GHz to 5 GHz using a Vector Network Analyzer (VNA), and...
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