An Efficient Method to Reduce an MAI’s Effect in Spectral Amplitude Coding OCDMA Network



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Submitted May 1, 2017
Published Jun 1, 2017
10.24018/ejeng.2017.2.6.339

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Multiple access interference (MAI) in spectral-amplitude coding, optical code division multiple access (SAC-OCDMA) scheme hardly limits the system performance. This problem increases proportionally with the amount of concurrent users. In addition, phase induces intensity noise (PIIN) coming from the spontaneous emission process of light source is extra impairment leads to system drop needs to be tackled too. Towards overcome the specified problems, vector combinatorial (VC) codes which based on grouping of certain vectors is proposed. Any positive integer number can be used in both weighs and user parameters in code building procedure, these technique nominees our code to be a potential reliable applicant for future optical communication schemes. Such flexibility is an exceptional property for VC compared to SAC-OCDMA counterparts’ codes. Compared with the systems employing Hadamard, Modified Frequency Hopping (MFH), Modified Quadratic-Congruence (MQC), and Modified Double Weight (MDW), numerical results show that, the VC is effective to reduce the power of MAI and PIIN. It has been exposed that, performance can be superior significantly when VC is used.

Keywords: Vectors Combinatorial (VC) Multiple Access Interference (MAI) Spectral-Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) Bit Error Rate (BER) PIIN SNR.

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