Ultra-Wideband Wireless Communications
Ultra-Wideband Wireless Communications
The ultra-wide bandwidth outdoor channel: from measurement campaign to statistical modelling
Mobile Networks and Applications
EURASIP Journal on Applied Signal Processing
Modeling the ultra-wideband outdoor channel: model specification and validation
IEEE Transactions on Wireless Communications
The COST259 Directional Channel Model-Part I: Overview and Methodology
IEEE Transactions on Wireless Communications
Statistical characterization of urban spatial radio channels
IEEE Journal on Selected Areas in Communications
Modeling the ultra-wideband outdoor channel: model specification and validation
IEEE Transactions on Wireless Communications
Spatial dynamics of indoor radio wideband channels
EURASIP Journal on Wireless Communications and Networking
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This paper presents results from an outdoor measurement campaign for ultra-wideband channels at gas stations. The results are particularly relevant for "infostations" where large amounts of data are downloaded to a user within a short period of time. We describe the measurement setup and present a novel high-resolution algorithm that allows the identification of the scatterers that give rise to multipath components. As input, the algorithm uses measurements of the transfer function between a single-antenna transmitter and a long uniform linear virtual array as receiver. The size of the array ensures that the incoming waves are spherical, which improves the estimation accuracy of scatterer locations. Insight is given on how these components can be tracked in the impulse response of a spatially varying terminal. We then group the detected scatterers into clusters, and investigate the angular power variations of waves arriving at the receiver from the clusters. This defines the cluster's "radiation pattern." Using sample measurements we show how obstacles obstruct the line-of-sight component - a phenomenon commonly referred to as "shadowing." We compare the measurement data in the shadowing regions (locations of the receiver experiencing shadowing) with the theoretical results predicted by diffraction theory and find a good match between the two.