Performance of optical wireless OOK and PPM systems under the constraints of ambient noise and multipath dispersion

Author

Chan, Hsun-Hung ; Sterckx, Karel L ; Elmirghani, Jaafar M H ; Cryan, Robert A.

Author_Institution

Northumbria Univ., Newcastle, UK

Volume

36

Issue

12

fYear

1998

fDate

12/1/1998 12:00:00 AM

Firstpage

83

Lastpage

87

Abstract

An investigation into the sensitivity performance of both a PPM and an OOK optical wireless communication system has been carried out in the presence of both ambient noise and multipath dispersion. It is shown that the sensitivity of a PPM scheme is more affected by multipath dispersion than a similar OOK format. Under the constraint of ambient noise, the findings were opposite. Both systems operate at 10 Mb/s and a wavelength of 850 nm. In a line-of-sight configuration, PPM offers an 8.77 dB sensitivity improvement over a comparable OOK system. In a semi-diffuse system impaired by multipath dispersion, the sensitivity improvement is reduced to 7.13 dB. When corrupted by ambient noise, the improvement was found to be 8.8 dB, which is slightly more

Keywords

amplitude shift keying; multipath channels; optical communication; optical dispersion; optical modulation; optical noise; pulse position modulation; OOK; PPM; ambient noise; line-of-sight configuration; multipath dispersion; optical wireless; semi-diffuse system; sensitivity performance; Equations; Light sources; Optical fiber dispersion; Optical noise; Optical receivers; Optical sensors; Optical transmitters; Satellites; Spine; Testing; Wireless communication; Wireless sensor networks;

fLanguage

English

Journal_Title

Communications Magazine, IEEE

Publisher

ieee

ISSN

0163-6804

Type

jour

DOI

10.1109/35.735882

Filename

735882