Performance analysis of coherent bandwidth-limited time-spreading encoding OCDMA system employing pulse-position modulation

Author

Chen, Xia ; Huang, Dijiang

Author_Institution

Coll. of Sci., China Three Gorges Univ., Yichang, China

Volume

4

Issue

5

fYear

2010

fDate

10/1/2010 12:00:00 AM

Firstpage

189

Lastpage

194

Abstract

Time-spreading (TS) phase encoding optical code division multiplexing access (OCDMA) systems with pulse-position modulation (PPM) signalling are investigated, the multiple access interference, optical beat noise and bandwidth limitation of receiver are considered. The authors also compare the performance of the PPM system with that of the conventional on-off keying (OOK) system with optimum threshold detection. Numerical results show that there exists an optimum pulse-position multiplicity for the PPM OCDMA system, and the corresponding PPM scheme is superior to OOK scheme in the coherent bandwidth-limited TS OCDMA system under the chip time constraint.

Keywords

code division multiple access; code division multiplexing; light coherence; light interference; optical modulation; optical noise; optical receivers; pulse position modulation; OCDMA system; OOK system; coherent bandwidth-limited time-spreading encoding optical code division multiplexing access system; multiple access interference; on-off keying system; optical beat noise; optical receiver; pulse-position modulation signalling;

fLanguage

English

Journal_Title

Optoelectronics, IET

Publisher

iet

ISSN

1751-8768

Type

jour

DOI

10.1049/iet-opt.2009.0060

Filename

5593986