Performance enhancement of spectral-amplitude coding OCDMA system using novel PPM signalling

A spectral‐amplitude coding (SAC) optical code‐division multiple‐access (OCDMA) system with M‐ary pulse‐position modulation (PPM) signalling is investigated. Novel combinatorial construction of optical signature codes is also presented, as that is applicable to both synchronous and asynchronous inco...

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Bibliographic Details
Published in:European transactions on telecommunications 2009-10, Vol.20 (6), p.572-579
Main Authors: Cui, K., Leeson, M. S., Hines, E. L.
Format: Article
Language:English
Subjects:
Applied sciences
Coding, codes
Exact sciences and technology
Information, signal and communications theory
Optical telecommunications
Signal and communications theory
Switching and signalling
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:A spectral‐amplitude coding (SAC) optical code‐division multiple‐access (OCDMA) system with M‐ary pulse‐position modulation (PPM) signalling is investigated. Novel combinatorial construction of optical signature codes is also presented, as that is applicable to both synchronous and asynchronous incoherent OCDMA. A union upper bound on the probability of error is then derived and the performance characteristics are discussed in the presence of multiple‐access interference (MAI) and intensity noise. The numerical results show that the bit‐error performance of the OCDMA system with proposed PPM coding outperforms that associated with on—off keying (OOK). Copyright © 2008 John Wiley & Sons, Ltd.
ISSN:1124-318X
1541-8251
DOI:10.1002/ett.1310