Improved BER based on intensity noise alleviation using developed detection technique for incoherent SAC-OCDMA systems

The major drawback of incoherent spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems is their inherent intensity noise originating due to the incoherency of the broadband light sources. In this paper, we propose a developed detection technique named the modified-AND s...

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Bibliographic Details
Published inJournal of modern optics Vol. 59; no. 10; pp. 878 - 886
Main Authors Al-Khafaji, Hamza M.R., Aljunid, S.A., Fadhil, Hilal A.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis Group 10.06.2012
Taylor & Francis Ltd
Subjects
Broadband
Code Division Multiple Access
Codes
Data transmission
Decoding
Electric noise
intensity noise
Mathematical analysis
modified-AND subtraction detection
multiple-access interference
Noise
optical code-division multiple-access
Retarding
Signal strength
Simulation
Spectra
spectral-amplitude coding
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Summary:The major drawback of incoherent spectral-amplitude coding optical code-division multiple-access (SAC-OCDMA) systems is their inherent intensity noise originating due to the incoherency of the broadband light sources. In this paper, we propose a developed detection technique named the modified-AND subtraction detection for incoherent SAC-OCDMA systems. This detection technique is based upon decreasing the received signal strength during the decoding process by dividing the spectrum of the utilized code sequence. The proposed technique is capable of mitigating the intensity noise effect, as well as suppressing the multiple-access interference impact. Based on modified quadratic congruence (MQC) code, the analytical results reveal that the modified-AND detection offer best bit-error rate (BER) performance and enables MQC code to support higher transmission rate up to 1.25 Gb/s compared to conventional AND detection. Furthermore, we ascertained that the proposed technique enhances the system performance using a simulation experiment.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2012.676094