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Open Access Research

Simulation of impulse response for indoor visible light communications using 3D CAD models

Silvestre Pérez Rodríguez1*, Rafael Pérez Jiménez2, Beatriz Rodríguez Mendoza1, Francisco José López Hernández3 and Alejandro José Ayala Alfonso1

Author Affiliations

1 Departamento de Física Fundamental y Experimental, Electrónica y Sistemas, Universidad de La Laguna, 38203, La Laguna, Tenerife, Spain

2 Instituto para el Desarrollo Tecnológico y la Innovación en Comunicaciones - IDeTIC, Universidad de Las Palmas de Gran Canaria, 35017, Las Palmas de Gran Canaria, Spain

3 Centro de Domótica Integral - CeDint, Universidad Politécnica de Madrid, 28223, Madrid, Spain

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EURASIP Journal on Wireless Communications and Networking 2013, 2013:7  doi:10.1186/1687-1499-2013-7

Published: 12 January 2013

Abstract

In this article, a tool for simulating the channel impulse response for indoor visible light communications using 3D computer-aided design (CAD) models is presented. The simulation tool is based on a previous Monte Carlo ray-tracing algorithm for indoor infrared channel estimation, but including wavelength response evaluation. The 3D scene, or the simulation environment, can be defined using any CAD software in which the user specifies, in addition to the setting geometry, the reflection characteristics of the surface materials as well as the structures of the emitters and receivers involved in the simulation. Also, in an effort to improve the computational efficiency, two optimizations are proposed. The first one consists of dividing the setting into cubic regions of equal size, which offers a calculation improvement of approximately 50% compared to not dividing the 3D scene into sub-regions. The second one involves the parallelization of the simulation algorithm, which provides a computational speed-up proportional to the number of processors used.

Keywords:
Visible light communications; Ray-tracing; Impulse response; CAD models; Parallelization