Home // International Journal On Advances in Telecommunications, volume 5, numbers 3 and 4, 2012 // View article

Maximal Rate of Mobile Wireless Optical Link in Indoor Environment

Authors:
Nicolas Barbot
Seyed Sina Torkestani
Stephanie Sahuguede
Anne Julien-Vergonjanne
Jean-Pierre Cances

Keywords: Indoor Wireless Optical Communications; Line of Sight Links; Diffuse Links; Outage probability; Outage Capacity; Fountain Codes

Abstract:
In this paper, we investigate the performance of an indoor wireless optical communication system by taking into account emitter mobility. We consider the two typical optical link configurations, which are Line of Sight (LOS) and diffuse ones. Mobility is described by using Gaussian statistical model of the emitter location. In order to determine the maximal rate, which can be obtained for each configuration, we first determine the outage probability of the link because of emitter mobility. From this, we also estimate the outage capacity, which corresponds to the maximal information rate for a given outage probability value. We analyze the different configuration performance and we point out the trade-off between emitted power and LOS and diffuse schemes constraints (tracking and blocking effect). We finally present the performance of two error control mechanisms, which are Automatic Repeat reQuest (ARQ) and Luby Transform (LT) codes and we compare the obtained rates to the outage capacity. We show that LT codes outperform ARQ mechanism for high outage probability values and provide a robust solution for indoor optical channel when mobility is considered.

Pages: 274 to 283

Copyright: Copyright (c) to authors, 2012. Used with permission.

Publication date: December 31, 2012

Published in: journal

ISSN: 1942-2601