2D Optical CDMA Technique Dedicated to Multimedia Transmission

Morelle, Mikaël; Julien-Vergonjanne, Anne; Cances, Jean-Pierre; Dumas, Jean-Michel

doi:10.1109/icc.2008.1014

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…However, OVSF codes can retain orthogonality only in case of zero time delay, which is difficult to realize in practical network environments. Two-dimensional OCDMA also can support compound data rates, but this scheme needs many wavelengths ( [2]). Coherent time-spreading OCDMA (TS-OCDMA) is the most attractive one, which is encoded by superstructure fiber Bragg grating (SSFBG).…”

Section: Introductionmentioning

confidence: 99%

Novel Scheme of Multi-Rate Quasi-synchronous Coherent Time-spreading OCDMA System

Xiao

2011

Joc

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We propose a novel scheme of multi-rate quasisynchronous coherent time-spreading OCDMA system, employing orthogonal variable spreading factor (OVSF) codes with a zero-correlation zone. Within permissible time delay, the aperiodic cross-correlation of OVSF with a zero-correlation zone equals zero. Therefore, multipleaccess interference and beat noise can be removed in multirate quasi-synchronous coherent time-spreading OCDMA system, and the near-far problem can also be eliminated. Simulation of eight simultaneous users with 2.5 Gbit/s, 1.25 Gbit/s and 0.625 Gbit/s is demonstrated, where the fiber link consists of 20 km single-mode fiber, plus 2 km Dispersion Compensating Fiber. The results show that OVSF codes with a zero-correlation zone can be employed to multi-rate quasi-synchronous coherent time-spreading OCDMA system.

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Section: Introductionmentioning

confidence: 99%

Novel Scheme of Multi-Rate Quasi-synchronous Coherent Time-spreading OCDMA System

Xiao

2011

Joc

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“…The high weight and short length result in a high signal to noise ratio (SNR) and low BER therefore various 2-D OCDMA techniques have been developed in designing the code sequences with emphasizing on specific code properties, headed for suppressing interferences and enhancing BER [4]. 2-D wavelength-time OCDMA system is anticipated to be an alternative to the next generation OCDMA system [5].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation Analysis of Wavelength/Time 2-D Modified Double Weight Code in OCDMA

2016

IJCCIE

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OCDMA Code Design for BER and Data Rate Differentiation in Beat Noise Corrupted Systems

Sahuguède¹,

Julien-Vergonjanne²,

Cances³

2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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International audienceUsing incoherent Optical Code Division Multiple Access (OCDMA) technique has recently attracted much interest since it appears to be not only a simple solution to provide user differentiation but also to perform service differentiation. The main limitation usually taken into account in the theoretical performance evaluation is Multiple Access Interference (MAI) linked to the fact that code sequences are unipolar and thus not strictly orthogonal. However, due to MAI and to the fact that the nature of the optical regime is not perfectly incoherent, beat noise constitutes another important limitation. We focus in this paper on multi-weight two dimensional (2-D) code sequences, which permits providing different BER services. We propose a theoretical statistical model to characterize MAI and beat noise impact. Thanks to this model, a theoretical error probability expression is established, taking into account both MAI and beat noise contribution in multimedia OCDMA systems. The design of multimedia codes satisfying targeted BERs can thus be done considering both limitations. The results permit highlighting the importance of beat noise consideration in the design process and the constraints imposed on optical source requirements

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2D Optical CDMA Technique Dedicated to Multimedia Transmission

Cited by 5 publications

References 11 publications

Novel Scheme of Multi-Rate Quasi-synchronous Coherent Time-spreading OCDMA System

Novel Scheme of Multi-Rate Quasi-synchronous Coherent Time-spreading OCDMA System

Performance Evaluation Analysis of Wavelength/Time 2-D Modified Double Weight Code in OCDMA

OCDMA Code Design for BER and Data Rate Differentiation in Beat Noise Corrupted Systems

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