Volume 1, Issue 2, October 2016, Page: 30-34
Spectrally Efficient SAC-OCDMA System Using a New Two-Code Keying Scheme
Hamza M. R. Al-Khafaji, Computer Techniques Engineering Department, Al-Mustaqbal Univers
Razali Ngah, Wireless Communication Centre, Faculty of Electrical Engineering
Alaa J. Mousa, Computer Techniques Engineering Department, Islamic University College, Najaf, Iraq
S. A. Aljunid, School of Computer and Communication Engineering, Universiti Malaysia Perlis, Perlis, Malaysia
Received: Jul. 2, 2016;       Accepted: Aug. 19, 2016;       Published: Sep. 26, 2016
DOI: 10.11648/j.ijics.20160102.13      View  2617      Downloads  67
Abstract
This paper introduces a new two-code keying scheme for increasing the spectral efficiency (SE) of spectral-amplitude-coding optical code-division multiple-access (SAC-OCDMA) system. The analytical expression is derived for the SE of SAC-OCDMA system based on the proposed scheme utilizing multi-diagonal (MD) code. The theoretical results demonstrate that the suggested scheme has an improved SE performance over the conventional unipolar encoding with direct detection technique. This SE enhancement is verified in simulation experiments.
Keywords
SAC-OCDMA, Spectral Efficiency, Two-Code Keying Scheme, Bipolar Encoding, MD Code
To cite this article
Hamza M. R. Al-Khafaji, Razali Ngah, Alaa J. Mousa, S. A. Aljunid, Spectrally Efficient SAC-OCDMA System Using a New Two-Code Keying Scheme, International Journal of Information and Communication Sciences. Vol. 1, No. 2, 2016, pp. 30-34. doi: 10.11648/j.ijics.20160102.13
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Reference
[1]
Kitayama, K. I.: ‘Optical code division multiple access: a practical perspective’, Cambridge University Press, 2014.
[2]
Kwong, W. C., and Yang, G.-C.: ‘Optical coding theory with prime’, CRC Press Taylor & Francis Group, 1st ed., 2013.
[3]
Sahuguede, S., Julien-Vergonjanne, A., and Cances, J. P.: ‘Beat noise compensation in OCDMA systems using soft decoding based FEC’, IEEE Transactions on Communications, 2011, 59, pp. 1400−1410.
[4]
Hussein, G. A., Abd El-atty, S. M., Oraby, O. A., Mohamed, A. E. A., Elkorany, A. S., Eldokany, I., Dessouky, M. I., El-Rabaie, E. M., Alshebeili, S. A., and El-Samie, F. E.: ‘An efficient MAI cancellation technique in optical CDMA’, Optik-International Journal for Light and Electron Optics, 2014, 125, pp. 2995−3000.
[5]
Al-Khafaji, H. M. R., Aljunid, S. A., Amphawan, A., and Fadhil, H. A.: ‘Improving spectral efficiency of SAC-OCDMA systems by SPD scheme’, IEICE Electron. Express, 2012, 9, pp. 1829−1834.
[6]
Shastri, B. J., El-Sahn, Z. A., Zeng, M., Kheder, N., Rusch, L. A., and Plant, D. V.: ‘A standalone burst-mode receiver with clock and data recovery, clock phase alignment, and RS (255, 239) codes for SAC-OCDMA applications’, IEEE Photonics Technology Letters, 2008, 20, pp. 363−365.
[7]
Anuar, M. S., Aljunid, S. A., Saad, N. M., and Hamzah, S. M.: ‘New design of spectral amplitude coding in OCDMA with zero cross-correlation’, Opt. Commun., 2009, 282, pp. 2659−2664.
[8]
Sedaghat, M. A., Muller, R. R., and Marvasti, F.: ‘Performance analysis of asynchronous optical code-division multiple access with spectral-amplitude-coding’, IET Commun., 2014, 8, pp. 956−963.
[9]
Al-Khafaji, H. M. R., Aljunid, S. A., Amphawan, A., and Fadhil, H. A.: ‘SOA/SPD-based incoherent SAC-OCDMA system at 9 × 5 Gbps’, IEICE Electron. Express, 2013, 10, 20130044.
[10]
Abd, T. A., Aljunid, S. A., Fadhil, H. A., Ahmad, R. A., and Saad, N. M.: ‘Development of a new code family based on SAC-OCDMA system with large cardinality for OCDMA network’, Opt. Fiber Technol., 2011, 17, pp. 273−280.
[11]
Al-Khafaji, H. M. R., Ngah, R., Aljunid, S. A., and Rahman, T. A.: ‘A new two-code keying scheme for SAC-OCDMA systems enabling bipolar encoding’, Journal of Modern Optics, 2015, 62, pp. 327−335.
[12]
Al-Khafaji, H. M. R., Ngah, R., Aljunid, S. A., Rahman, T. A., and Ahmed, M. Y.: ‘A new approach for enabling bipolar encoding in high-rate SAC-OCDMA systems’, IEEE 2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA15), Sharjah, United Arab Emirates (UAE), 2015.
[13]
Al-Khafaji, H. M. R., Ngah, R., Aljunid, S. A., and Rahman, T. A.: ‘A novel encoding and decoding structure for SAC-OCDMA systems enabling high-rate transmission’, IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE2014), Johor Bahru, Malaysia, 2014.
[14]
Al-Khafaji, H. M. R., Ngah, R., Aljunid, S. A., and Rahman, T. A.: ‘An innovative encoding/decoding architecture based on two-code keying for SAC-OCDMA systems’, IEEE 5th International Conference on Photonics (ICP2014), Kuala Lumpur, Malaysia, 2014.
[15]
Rochette, M., Ayotte, S., and Rusch, L. A.: ‘Analysis of the spectral efficiency of frequency-encoded OCDMA systems with incoherent sources’, J. Lightwave Technol., 2005, 23, pp. 1610−1619.
Browse journals by subject