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Proceedings Paper

Adaptive OFDM system for multi-user communications over the indoor wireless optical channel
Author(s): Oswaldo González; Silvestre Rodríguez; Rafael Pérez-Jiménez; Beatriz R. Mendoza; Francisco Delgado
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Paper Abstract

In this paper, an adaptive Orthogonal Frequency Division Multiplexing (OFDM) system is proposed for multiuser communications over indoor wireless optical channels. The designed system uses multi-user least-squares (LS) detection techniques applied to SDMA-OFDM schemes, in conjunction with angle diversity reception. The system, which does not present an excessive complexity, supports high bit rates for multiple users, beyond one hundred megabits per second. It also mitigates the channel fluctuations induced when either the space distribution or the number of emitters and receivers varies. The performance of the new proposed scheme is compared with an adaptive single-user system described in previous works. The obtained results show a significant improvement with respect to previous adaptive single-user one, since the new scheme allows adaptively managing the system throughput on a multi-user environment.

Paper Details

Date Published: 12 June 2007
PDF: 12 pages
Proc. SPIE 6593, Photonic Materials, Devices, and Applications II, 65931D (12 June 2007); doi: 10.1117/12.721957
Show Author Affiliations
Oswaldo González, Univ. of La Laguna (Spain)
Silvestre Rodríguez, Univ. of La Laguna (Spain)
Rafael Pérez-Jiménez, Univ. of Las Palmas de Gran Canaria (Spain)
Beatriz R. Mendoza, Univ. of La Laguna (Spain)
Francisco Delgado, Univ. of Las Palmas de Gran Canaria (Spain)

Published in SPIE Proceedings Vol. 6593:
Photonic Materials, Devices, and Applications II
Ali Serpengüzel; Gonçal Badenes; Giancarlo C. Righini, Editor(s)

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