Abstract

BIOSCA ROJAS, Dioén  and  LOPEZ PRESMANES, Jorge Luís. Generalization of Monte Carlo Ray-Tracing Algorithm for the Calculation of the Impulse Response on Indoor Wireless Infrared Channels. uct [online]. 2005, vol.9, n.33, pp.17-25. ISSN 1316-4821.

In this paper a new model for the calculation of the impulse response on indoor wireless infrared channels is proposed. The use of Bidirectional Reflectance Distribution Functions on a modified Monte Carlo ray-tracing algorithm allows a better modeling of the reflection properties of the different reflecting surfaces present in the channel, transforming the original Monte Carlo scheme in a more general and accurate simulation tool. The work with reflectance functions is possible because of the derivation of the directional-hemispherical reflection coefficient as a function of reflectors material for different types of reflectors. This aspect is shown along the paper as well as the ways for obtaining reflected rays directions by sampling the reflectors reflectance function as a probability distribution function. Some considerations about efficiency and convergence of the new proposed algorithm are included. Also, some simulations results on typical reported configurations are presented and discussed as particular cases for the new formulation. The comparison of this results with the results reported by other authors for the same configurations is used for validating the new algorithm just presented.

Keywords : Impulse Response; Monte Carlo; Ray-Tracing Algorithm; Wireless Infrared Chanels; Wireless Optical Links.