Performance analysis of hybrid SAC-OCDMA/WDMA system using Random Diagonal code

A hybrid Spectral-Amplitude-Coding (SAC) - Optical Code Division Multiple Access (OCDMA) /Wavelength - Division-Multiple-Access (WDMA) using Random Diagonal (RD) code is proposed in this paper. The RD code is used in the proposed system due to its receiver's flexibility. The system is simulated using OptiSystem software. In our proposed system, four users of WDMA system with bit rate of 10Gbps is coupled with users of OCDMA system performing on bit rate of 1.25Gbps. Comparing to hybrid SAC-OCDMA /WDMA using KS code, the proposed system offers better performance in term of lower code length and lower bit error rate (BER) at the expense of higher number of filters. The result also shows that the BER of nine RD users are maintained at not more than 10-9 up to 75 km.

[1]  Makhfudzah Mokhtar,et al.  Optical domain service differentiation using spectral-amplitude-coding , 2009 .

[2]  A. Chraplyvy.  Limitations on lightwave communications imposed by optical-fiber nonlinearities , 1990 .

[3]  Po-Hao Chang,et al.  Capacity improvement of a hybrid CDMA/WDMA system by various bandwidth allocations , 2002, The 8th International Conference on Communication Systems, 2002. ICCS 2002..

[4]  Syed Alwee Aljunid,et al.  Performance of random diagonal code for OCDMA systems using new spectral direct detection technique , 2009 .

[5]  Chao-Chin Yang.  Hybrid wavelength-division-multiplexing/spectral-amplitude-coding optical CDMA system , 2005, IEEE Photonics Technology Letters.

[6]  Hossam M. H. Shalaby,et al.  Modified quadratic congruence codes for fiber Bragg-grating-based spectral-amplitude-coding optical CDMA systems , 2001 .

[7]  Fan Chung Graham,et al.  Optical orthogonal codes: Design, analysis, and applications , 1989, IEEE Trans. Inf. Theory.

[8]  Desmond P. Taylor,et al.  Performance enhancement of spectral-amplitude-coding optical CDMA using pulse-position modulation , 1998, IEEE Trans. Commun..

[9]  Jen-Fa Huang,et al.  Hybrid WDM and optical CDMA implemented over waveguide-grating-based fiber-to-the-home networks , 2007 .

[10]  Paul R. Prucnal.  Optical Code Division Multiple Access : Fundamentals and Applications , 2005 .

[11]  Bo Li,et al.  Virtual topologies for WDM star LANs-the regular structures approach , 1992, [Proceedings] IEEE INFOCOM '92: The Conference on Computer Communications.

[12]  A.F. Abas,et al.  Performance analysis of a variable-weight OCDMA system under the impact of fiber impairments , 2011, 2011 2nd International Conference on Photonics.

[13]  Chao-Chin Yang.  Hybrid wavelength-division-multiplexing/spectral-amplitude-coding optical CDMA system , 2005 .

[14]  K. Kitayama,et al.  OCDMA over WDM PON-solution path to gigabit-symmetric FTTH , 2006, Journal of Lightwave Technology.