UWB Industrial Radio Channel Coherent Paths Statistics Derived from Measurements

J. Kunisch and J. Pamp (Germany)

Keywords

UltraWideband, Radio Channel, Coherent Path, Multipath Envelope, Time of Arrival, Azimuth Spread

Abstract

This paper presents results derived from 3-11 GHz direc tional radio channel measurements in an industrial envi ronment. We focus on two scenarios for communication and localization using sensors and access points, namely sensor-to-access point and access point-to-access point. Results for the distribution of time and angle of arrival and power of coherent paths, and power azimuth delay spectra are given. For example, we find log-logistic and Weibull marginal distributions for the arrival times. We analyse and adapt a Fourier technique to estimate the power azimuth delay spectrum from ultra-wideband array data. Further more, a robust approach to estimate the envelope of the dif fuse multipath background from the power azimuth delay spectrum is proposed, which is useful to identify coherent paths. As a side result, for the resulting envelopes the IEEE 802.15.4a NLOS envelope model gives a reasonable match similar to Franceschetti’s envelope derived from a stochas tic ray propagation model.

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