Abstract
Ultrawideband (UWB) has the ability to achieve decimetre level of ranging accuracy, hence, its wider usage nowadays in the field of positioning. In spite of the attractiveness of UWB, its performance is strongly dependent on the propagation channel. In this paper, an analysis of the the UWB channel for ranging applications using an inhouse developed 3D Ray launching (3D RL) algorithm is presented. A parametric study has been performed considering variations of cuboid size resolution of the simulation mesh, in order to analyze convergence impact on estimation accuracy, focusing on Radio frequency (RF) power levels as well as time domain characterization. The RF power results have been used to model the path-loss, small scale fading, and the power delay profile so as to obtain the statistics of the multipath channel as well as time of flight (TOF) estimation values. The results show that the 3D RL is a valuable tool to test UWB systems for ranging applications with a mean accuracy of up to 10 cm in multipath conditions considering complex scatterer distributions within the complete volume of the scenarios under test.
Highlights
The Federal Communications Commission (FCC) and the International Telecommunication Union Radiocommunication sector (ITU-R) define Ultrawideband (UWB) as an antenna transmission for which the emitted signal occupies a fractional bandwidth greater than 0.2 or a bandwidth more than 500 MHz
Do we present a novel analysis of the UWB channel using an inhouse developed 3D Ray launching (3D Ray Launching (RL)), and use the RL technique to obtain the accurate ranging results from the time domain properties of the signal
We have presented a detailed analysis of the UWB channel for ranging applications using an inhouse developed 3D RL tool
Summary
The Federal Communications Commission (FCC) and the International Telecommunication Union Radiocommunication sector (ITU-R) define Ultrawideband (UWB) as an antenna transmission for which the emitted signal occupies a fractional bandwidth greater than 0.2 or a bandwidth more than 500 MHz. T. Otim et al.: 3D RL Time-Frequency Channel Modeling Approach for UWB Ranging Applications systems. As far as the authors are concerned there is no work in the literature that provides a careful analysis of the UWB channel using 3D RL tool focusing on RF power levels as well as on time of flight (TOF) estimation. Do we present a novel analysis of the UWB channel using an inhouse developed 3D RL, and use the RL technique to obtain the accurate ranging results from the time domain properties of the signal. 3) Using the time domain properties of the UWB signal, the 3D RL tool is used to obtain the accurate TOF ranging results which can be used in any positioning application.
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