Performance and confidentiality comparison of different hybrid SAC/OCDMA-WDM overlay schemes

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Code pulses of a spectral amplitude coding/optical code division multiple-access (SAC/OCDMA) system are overlaid onto a multichannel wavelength division multiplexing (WDM) system. Modified quadratic congruence (MQC) codes are developed as the signature codes for the SAC/OCDMA system. The developed code is to avoid the overlapping between signals of both systems with no use of notch filters. In addition, performance and confidentiality results of this scheme are compared to our previous hybrid SAC/OCDMA-WDM overlay scheme which utilizes normal MQC codes with notch filters. The system performance and data confidentiality are evaluated in terms of bit-error rate (BER) and eye diagrams. The eavesdropper's interceptor that is based on a simple energy detector can scan all corresponding SAC/OCDMA wavelengths to detect an entire coded signal of an authorized user. Our results indicate that the performance and confidentiality have inverse relationship between the two hybrid systems. For a first hybrid scheme that does not adopt notch filters, the BER performance, when a data rate is 622 Mbps, for OCDMA users is about 10-15 at 4 dB of an optical attenuator, and BER for eavesdropper detection values vary from 10 -6 to 10 -15 due to different overlapping effects between WDM interferes and OCDMA pulses. On the second hand for a hybrid scheme that contains notch filters, the BER performance for OCDMA users is about 10 -12 at 4 dB of an optical attenuator, and for eavesdropper detection values are mostly about 10 -2. However, it is concluded that an eavesdropper faces immunity from SAC/OCDMA system in both cases because WDM channels act as a partial masking over encoded signals in a hybrid scheme. Furthermore, the tradeoff between the performance and confidentiality for authorized SAC/OCDMA users is considered.

Original languageEnglish
Title of host publicationProgress in Electromagnetics Research Symposium
Pages1594-1599
Number of pages6
Publication statusPublished - 2012
EventProgress in Electromagnetics Research Symposium, PIERS 2012 Kuala Lumpur - Kuala Lumpur
Duration: 27 Mar 201230 Mar 2012

Other

OtherProgress in Electromagnetics Research Symposium, PIERS 2012 Kuala Lumpur
CityKuala Lumpur
Period27/3/1230/3/12

Fingerprint

Wavelength division multiplexing
Code division multiple access
Notch filters
Bit error rate
Hybrid systems
Detectors
Wavelength

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Ashour, I. A. M., Shaari, S., Shalaby, H. M. H., & N V Visvanathan, P. S. M. (2012). Performance and confidentiality comparison of different hybrid SAC/OCDMA-WDM overlay schemes. In Progress in Electromagnetics Research Symposium (pp. 1594-1599)

Performance and confidentiality comparison of different hybrid SAC/OCDMA-WDM overlay schemes. / Ashour, Isaac A M; Shaari, Sahbudin; Shalaby, Hossam M H; N V Visvanathan, P. Susthitha Menon.

Progress in Electromagnetics Research Symposium. 2012. p. 1594-1599.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ashour, IAM, Shaari, S, Shalaby, HMH & N V Visvanathan, PSM 2012, Performance and confidentiality comparison of different hybrid SAC/OCDMA-WDM overlay schemes. in Progress in Electromagnetics Research Symposium. pp. 1594-1599, Progress in Electromagnetics Research Symposium, PIERS 2012 Kuala Lumpur, Kuala Lumpur, 27/3/12.
Ashour IAM, Shaari S, Shalaby HMH, N V Visvanathan PSM. Performance and confidentiality comparison of different hybrid SAC/OCDMA-WDM overlay schemes. In Progress in Electromagnetics Research Symposium. 2012. p. 1594-1599
Ashour, Isaac A M ; Shaari, Sahbudin ; Shalaby, Hossam M H ; N V Visvanathan, P. Susthitha Menon. / Performance and confidentiality comparison of different hybrid SAC/OCDMA-WDM overlay schemes. Progress in Electromagnetics Research Symposium. 2012. pp. 1594-1599
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