Angle-of-arrival estimation with array in a line-of-sight indoor UWB-IR
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Threshold selection for ultra-wideband TOA estimation based on skewness analysis
UIC'11 Proceedings of the 8th international conference on Ubiquitous intelligence and computing
EWSN'13 Proceedings of the 10th European conference on Wireless Sensor Networks
Analysis of fading statistics in cellular mobile communication systems
The Journal of Supercomputing
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Propagation measurements using a large array are used to study the angle of arrival (AOA) across the ultrawideband (UWB) frequency range of 3.1 to 10.6 GHz. A two-dimensional Unitary ESPRIT algorithm is employed to give a high resolution estimation of AOA including both the azimuth and elevation angles of multipath components. The frequency dependence of AOA is investigated over the UWB frequency band. The multipath rays form clusters in both angular and temporal domains. Within a cluster the azimuth and elevation AOAs are determined to follow Laplacian and Gaussian distributions respectively. In the indoor environment considered, a typical cluster extends over an angular sector of approximately 14 degrees in azimuth and 9 degrees in elevation, with up to 5 clusters observed. We note that these propagation characteristics will allow UWB systems to utilise smart antennas or MIMO structures to improve overall throughput.