Comparisons of ray tracing predictions and field trial results for broadband fixed wireless access scenarios

Authors:
G. E. Athanasiadou;I. J. Wassell
Affiliations:
University of Peloponnese, Department of Telecommunications Science & Technology, Tripoli, Greece;University of Cambridge, Laboratory for Communication Engineering, Dept. of Engineering, Cambridge, United Kingdom
Venue:
ICCOM'05 Proceedings of the 9th WSEAS International Conference on Communications
Year:
2005

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Abstract

In this paper, results from a three-dimensional (3D) ray-tracing propagation model are compared with field trial measurements. The ray tracing algorithm is optimised for Broadband Fixed Wireless Access (BFWA) operational scenarios. The model works with raster terrain as well as 3D vector building and foliage databases. It considers reflections off building walls, off-axis diffractions on roof tops, terrain and tree tops, as well as foliage attenuation. Outputs include the received power and the impulse response of the wireless channel. The field trial measurements carried out for different scenarios (propagation conditions, antenna heights, distance from the access point, etc.) in the city of Cambridge (UK) with a commercial BFWA operating system (3.5 GHz). The analysis studies the propagation characteristics of the BFWA radio channel and the accuracy of the presented deterministic propagation modelling approach, and it shows that the simulated results follow the measured with a mean error of 2.8 dB and a standard deviation of 6.7 dB.