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In this paper, the authors propose a computer simulation model for the study of the large-scale effects on UltraWideBand (UWB) transmission systems. The path loss is of particular interest. The development of the path loss model is based on the ray-tracing technique. This paper concentrates on the first-order scattering effects, namely only the single-hop Line-Of-Sight (LOS) signal and the two-hop multipath signals are considered. The simulation results are consistent with the measurements that have been reported by several studies recently. More specifically, the authors' simulation results confirm the observation that the path loss over an UWB channel is independent of frequency.
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