Investigation of in-band transmission of both spectral amplitude coding/optical code division multiple-access and wavelength division multiplexing signals

Isaac A M Ashour, Sahbudin B H Shaari, P. Susthitha Menon N V Visvanathan, Hossam M H Shalaby

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The transmission of both optical code division multiple-access (OCDMA) and wavelength division multiplexing (WDM) users on the same band is investigated. Code pulses of spectral amplitude coding (SAC)/optical code division multiple-access (CDMA) are overlaid onto a multichannel WDM system. Notch filters are utilized in order to suppress the WDM interference signals for detection of optical broadband CDMA signals. Modified quadratic congruence (MQC) codes are used as the signature codes for the SAC/OCDMA system. The proposed system is simulated and its performance in terms of both the bit-error rate and Q-factor are determined. In addition, eavesdropper probability of error-free code detection is evaluated. Our results are compared to traditional nonhybrid systems. It is concluded that the proposed hybrid scheme still achieves acceptable performance. In addition, it provides enhanced data confidentiality as compared to the scheme with SAC/OCDMA only. It is also shown that the performance of the proposed system is limited by the interference of the WDM signals. Furthermore, the simulation illustrates the tradeoff between the performance and confidentiality for authorized users.

Original languageEnglish
Article number065001
JournalOptical Engineering
Volume50
Issue number6
DOIs
Publication statusPublished - Jun 2011
Externally publishedYes

Fingerprint

code division multiple access
wavelength division multiplexing
Wavelength division multiplexing
Code division multiple access
coding
interference
congruences
Notch filters
tradeoffs
Signal interference
notches
bit error rate
Bit error rate
Q factors
signatures
broadband
filters
pulses
simulation

Keywords

  • modified quadratic congruence
  • optical codedivision multiple-access
  • optical network security
  • spectral amplitude coding
  • wavelength division multiplexing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering(all)

Cite this

Investigation of in-band transmission of both spectral amplitude coding/optical code division multiple-access and wavelength division multiplexing signals. / Ashour, Isaac A M; Shaari, Sahbudin B H; N V Visvanathan, P. Susthitha Menon; Shalaby, Hossam M H.

In: Optical Engineering, Vol. 50, No. 6, 065001, 06.2011.

Research output: Contribution to journalArticle

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