Design and Performance Improvement of Three-Dimensional Optical Code Division Multiple Access Networks with NAND Detection Technique

Authors: Satyasen Panda, Urmila Bhanja

Abstract:

In this paper, we have presented and analyzed three-dimensional (3-D) matrices of wavelength/time/space code for optical code division multiple access (OCDMA) networks with NAND subtraction detection technique. The 3-D codes are constructed by integrating a two-dimensional modified quadratic congruence (MQC) code with one-dimensional modified prime (MP) code. The respective encoders and decoders were designed using fiber Bragg gratings and optical delay lines to minimize the bit error rate (BER). The performance analysis of the 3D-OCDMA system is based on measurement of signal to noise ratio (SNR), BER and eye diagram for a different number of simultaneous users. Also, in the analysis, various types of noises and multiple access interference (MAI) effects were considered. The results obtained with NAND detection technique were compared with those obtained with OR and AND subtraction techniques. The comparison results proved that the NAND detection technique with 3-D MQC\MP code can accommodate more number of simultaneous users for longer distances of fiber with minimum BER as compared to OR and AND subtraction techniques. The received optical power is also measured at various levels of BER to analyze the effect of attenuation.

Keywords: Cross correlation, three-dimensional optical code division multiple access, spectral amplitude coding optical code division multiple access, multiple access interference, phase induced intensity noise, three-dimensional modified quadratic congruence/modified prime code.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126581

References:

[1] Zouine Y, Dayoub I, Haxha S and Rouvaen J. M., “Analyses of constraints on high speed optical code division multiplexing access (OCDMA) link parameters due to fiber optic chromatic dispersion”, Journal of Optical Communication. vol. 281, 2008, pp. 1030–1036.
[2] Santoro M A and Fan T R., “Spread spectrum fiber optic local area network using optical processing”, Journal of. Light wave Technology. vol. 4, 1986, pp.547–554.
[3] Zou Wei, H.M.H Shalaby, H Ghafouri-shiraz, “Modified quadratic congruence code for fiber Bragg Grating based spectral amplitude coding optical CDMA system”. Journal of light wave technology. vol 19, 2001, pp.1274-1281.
[4] Yang G.C and Kwong W.C., “Prime code with applications to CDMA optical and wireless networks”, Boston: Artech House, 2002.
[5] Hasson F N, Aljunid S A, Samad M.D.A and Abdullah M K., “Spectral amplitude coding OCDMA using AND subtraction technique”, Application of Optics. vol. 47, 2008, pp. 1263–1268.
[6] M.K. Abdullah, N.F. Hasoon, S.A. Aljunaid, S. Shaari., “Performance of OCDMA systems with new spectral direct detection (SDD) technique using enhaced double weight (EDW) code”, J. Opt. Communication, vol.281, 2008, 4658-4662.
[7] N. Ahmed, S.A. Aljunaid, A. Fadil, R.B. Ahmad, M.A. Rashid., “Performance enhancement of OCDMA system using NAND detection with modified double weight (MDW) code for optical access network”, Journal of Optik, vol.124, 2013, pp.1402-1407.
[8] Mohammed Noshad, and Kambiz Jamshidi., “Code family for modified spectral amplitude coding OCDMA system and performance analysis”, Journal of Optical Communication Networks. vol. 2, 2010, pp. 344– 354.
[9] Aljunaid S.A, Ismail M, and Ramil A.R., “A new family of optical code sequence for spectral-amplitude-coding optical CDMA systems”, IEEE Photonic Technology Letters, vol. 16, 2004, pp. 2383–2385.
[10] M.S Anwar, S.A. Alijunaid, N.M. Saad, S.M. Hamzah, “New design of spectral amplitude coding in ocdma with zero cross correlation”, Journal of optical communication, vol.282,2009,pp.2659-2664.
[11] H.A. Fadhil, S.A. Alijunaid, H.Y. Ahmed, H.M.R. Alkhafaji, “Variable cross-correlation code construction for spectral amplitude coding optical CDMA networks”. Journal of Optik, vol.123, 2012, pp.956-963.
[12] M H Kakaee, Saleh S,H A Fadhil, S B A Anas, M Mokhtar. “Development of Multi-Service (MS) for SAC-OCDMA system”. Journal of Optic & Laser technology.vol.60, 2014, pp.49-55.
[13] J.H. Wen, J.S. Jhou, C.P. Li, “optical spectral amplitude coding CDMA systems using perfect difference code and interference estimation”, IEEE proceedings Optoelectronics, vol.153, 2006, pp.152-160.
[14] Z. Wei, H. Ghafouri-Shiraz. “Codes for spectral-amplitude-coding optical CDMA systems”, J. Lightwave Technol, vol.20, no.8, 2002, pp.1284–1289.