Resumo

ESCOBAR, Adolfo; LOZANO, Lorena; CADAVID, Hector  e  CATEDRA, Manuel F.. Analysis of wireless propagation using a novel 3D Raytracing acceleration techniqueAnálisis de propagación inalámbrica usando una nueva técnica 3D de aceleración de trazado de rayos. Ing. compet. [online]. 2013, vol.15, n.2, pp.45-55. ISSN 0123-3033.

The rapid growth in wireless communications has led to the need for an effective way to evaluate the radio propagation. Dense urban areas and indoor spaces tend to be complex environments that require a lot of obstacles to be modeled. In such environments, the radio propagation is an extremely complex phenomenon and ray tracing techniques have been widely used to analyze these problems. However, the main drawback of ray tracing algorithm is it slowness. Therefore, the ray tracing process should be performed using techniques that improve the efficiency of the computations. This paper presents a new ray tracing acceleration technique that combines AZB and octree techniques to subdivide the space. This new technique was validated by propagation measurements in two hospital environments and the maximum error encountered for measured and calculated values was below 8%. The new technique reduces the computation time by half in comparison to AZB technique. But, as the number of interactions increases, computational time increases as well

Palavras-chave : Acceleration techniques; propagation models; ray-tracing; wireless communications.

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