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Proceedings Paper

Performance of wireless infrared transmission systems considering both ambient light interference and intersymbol interference due to multipath dispersion
Author(s): Antonio M.R. Tavares; Rui Jorge Morais Tomaz Valadas; A. M. Oliveira Duarte
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Paper Abstract

The performance of optical wireless transmission systems is mainly impaired by the shot noise induced by ambient light, interference produced by artificial light sources, transmitted optical power limitations due to high path losses and channel bandwidth limitations due to inter-symbol interference produced by the multipath dispersion of the optical signal. The contribution of these factors to the performance evaluation of infrared links have only been addressed independently and the combined effect of these channel impairments was not presented yet. The work presented in this paper extends the previous analysis by taking into account the combined effects of both optical noise (shot noise and interference) and channel impulse response. A simulation package was used to determine the indoor optical channel impulse response due to the propagation losses and multipath dispersion under various room geometries and emitter/receiver parameters. The contribution of the interference produced by incandescent and fluorescent lamps was done through the utilization of analytical models. The penalty introduced by these channel characteristics was quantified considering the modulation schemes usually considered for optical wireless communication systems: 2-, 4- and 16-PPM (pulse position modulation) at bit rates from 1 to 10 Mbps.

Paper Details

Date Published: 27 January 1999
PDF: 12 pages
Proc. SPIE 3532, Optical Wireless Communications, (27 January 1999); doi: 10.1117/12.338971
Show Author Affiliations
Antonio M.R. Tavares, Instituto de Telecomunicacoes/Univ. de Aveiro (Portugal)
Rui Jorge Morais Tomaz Valadas, Instituto de Telecomunicacoes/Univ. de Aveiro (Portugal)
A. M. Oliveira Duarte, Instituto de Telecomunicacoes/Univ. de Aveiro (Portugal)

Published in SPIE Proceedings Vol. 3532:
Optical Wireless Communications
Eric J. Korevaar, Editor(s)

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