Minimizing correlation effect using zero cross correlation code in spectral amplitude coding optical code division multiple access
Date
2012-01Author
Anuar, Mat Safar, Ir. Dr.
Syed Alwee Aljunid, Syed Junid, Prof. Dr.
Amir Razif Arief, Jamil Abdullah, Dr.
Junita, Mohd Nordin
Mohamad Naufal, Mohamad Saad, Assoc. Prof.
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Show full item recordAbstract
The use of minimal multiple access interference (MAI) in code design is investigated. Applying a projection and mapping techniques, a code that has a zero cross correlation (ZCC) between users in optical code division multiple access (OCDMA) is presented in this paper. The system is based on an incoherent light source-LED, spectral amplitude coding (SAC), and direct detection techniques at the receiver. Using power spectral density (PSD) function and Gaussian approximation, we obtain the signal-to-noise ratio (SNR) and the bit-error rate (BER) to measure the code performance. Making a comparison with other existing codes, e. g., Hadamard, MFH and MDW codes, we show that our code performs better at BER 10 -9 in terms of number of simultaneous users. We also demonstrate the comparison between the theoretical and simulation analyses, where the results are close to one another.