Effects of the Vector Combinatorial code connection parameters on the performance of an OCDMA system for high-speed networks

In this paper, we study the performance of optical code-division multiple access (OCDMA) systems using vector combinatorial (VC) code under various link parameters. The impact of the fiber dispersion effects on the multi-user interference (MUI) is reported using a commercial optical systems simulator, Virtual Instrument Photonic (VPITM). The VC code is compared mathematically with other codes which use similar techniques. We analyzed and optimized the data rate, fiber length, and channel spacing in order to reduce the BER without the need to deploy dispersion compensating devices. The performance and optimization of VC code in OCDMA system is reported. We have demonstrated that, for a high data rate (higher than 2.5 Gb/s), even if dispersion compensated devices are not deployed, the BER can be significantly improved when the VC code desired parameters are selected. We have shown that when compensation dispersion devices are not deployed in the system, there is a tradeoff between the limited dispersion effects and the MUI.

[1]  Jawad A. Salehi,et al.  Code division multiple-access techniques in optical fiber networks. II. Systems performance analysis , 1989, IEEE Trans. Commun..

[2]  J. Goodman.  Statistical Optics , 1985 .

[3]  Zou Wei,et al.  Unipolar codes with ideal in-phase cross-correlation for spectral amplitude-coding optical CDMA systems , 2002, IEEE Trans. Commun..

[4]  Paul R. Prucnal,et al.  Spread spectrum fiber-optic local area network using optical processing , 1986 .

[5]  Jawad A. Salehi,et al.  Code division multiple-access techniques in optical fiber networks. I. Fundamental principles , 1989, IEEE Trans. Commun..

[6]  Mohsen Kavehrad,et al.  Optical code-division-multiplexed systems based on spectral encoding of noncoherent sources , 1995 .

[7]  H. Ghafouri-Shiraz,et al.  Codes for spectral-amplitude-coding optical CDMA systems , 2002 .

[8]  Ivan B. Djordjevic,et al.  Novel combinatorial constructions of optical orthogonal codes for incoherent optical CDMA systems , 2003 .

[9]  Edward H. Sargent,et al.  Lighting the local area: optical code-division multiple access and quality of service provisioning , 2000, IEEE Netw..

[10]  Hassan Yousif Ahmed,et al.  Spectral Amplitude Coding Optical CDMA: Performance Analysis of PIIN Reduction Using VC Code Family , 2009 .

[11]  Bane V. Vasic,et al.  Combinatorial constructions of optical orthogonal codes for OCDMA systems , 2004, IEEE Communications Letters.

[12]  M.K. Abdullah,et al.  A new family of optical code sequences for spectral-amplitude-coding optical CDMA systems , 2004, IEEE Photonics Technology Letters.

[13]  Mohamad Khazani Abdullah,et al.  Performance of OCDMA systems with new spectral direct detection (SDD) technique using enhanced double weight (EDW) code , 2008 .

[14]  A.E. Willner,et al.  Variable Bit Rate Optical CDMA Networks Using Multiple Pulse Position Modulation , 2007, OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference.