Baseline-wander effects on systems employing digital pulse-interval modulation

Hayes, Andrew, Ghassemlooy, Zabih, Seed, N. L. and McLaughlin, R. (2000) Baseline-wander effects on systems employing digital pulse-interval modulation. IEE Proceedings - Optoelectronics, 147 (4). pp. 295-300. ISSN 1350-2433

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Abstract

Fluorescent lamps introduce a periodic interference signal in optical wireless receivers, which has the potential to degrade link performance severely. Usually, electrical high-pass filtering is employed to mitigate the effects of this interference, but this results in baseline wander or intersymbol interference. Digital pulse-interval modulation (DPIM) is a modulation technique which has been shown to be suitable for deployment in optical-wireless-communication systems. The effect of baseline wander on systems employing DPIM is examined. A new expression is given for the slot autocorrelation function of DPIM and, from this, the power spectral density is calculated. The error performance of DPIM, as a function of high-pass filter (HPF) cut-on frequency, is compared with the more established techniques of on-off keying using nonreturn-to-zero signalling (OOK) and pulse-position modulation (PPM), using both numerical analysis and computer simulation.

Item Type:	Article
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	25 Apr 2014 14:07
Last Modified:	12 Oct 2019 19:05
URI:	http://nrl.northumbria.ac.uk/id/eprint/16160

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