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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 32, Iss. 15 — Aug. 1, 2014
  • pp: 2649–2658

Performance Analysis of Multirate Multiservice Optical CDMA Networks Adopting Overlapping PPM Signaling

Ahmed E. Farghal, Hossam M. H. Shalaby, and Zen Kawasaki

Journal of Lightwave Technology, Vol. 32, Issue 15, pp. 2649-2658 (2014)


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Abstract

In this paper, an optical code-division multiple-access (OCDMA) system employing overlapping pulse-position modulation (OPPM) is proposed to support multimedia services with different bit-rate and quality-of-service (QoS) requirements in OCDMA networks. Both wrapped OPPM (WOPPM) and unwrapped OPPM (UOPPM) are considered. The proposed system achieves multirate and multi-QoS transmission by using multilength variable-weight optical orthogonal codes (MLVW-OOCs) as signature sequences and using different values of OPPM modulation parameters. Furthermore, numerical analysis is performed for two different receiver structures, namely, correlation receivers with and without hard-limiters. In our analysis, the multiple-access interference (MAI) is considered as the main performance limiting factor. In addition, the performance of the proposed system is evaluated and compared to that of traditional OOK-OCDMA system. Our results reveal that under both pulsewidth and throughput constraints, the performances of the proposed WOPPM- and UOPPM-OCDMA systems are significantly superior to that of OOK-OCDMA system.

© 2014 IEEE

History
Original Manuscript: February 24, 2014
Manuscript Accepted: June 16, 2014
Published: June 18, 2014

Citation
Ahmed E. Farghal, Hossam M. H. Shalaby, and Zen Kawasaki, "Performance Analysis of Multirate Multiservice Optical CDMA Networks Adopting Overlapping PPM Signaling," J. Lightwave Technol. 32, 2649-2658 (2014)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-32-15-2649

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