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Erschienen in:
2017 | OriginalPaper | Buchkapitel
Effect and Suppression of Noise in 2D PC/OOC Scheme for Optical CDMA Systems
verfasst von : Manisha Bharti, Ajay K. Sharma, Manoj Kumar
Erschienen in: Proceedings of the International Conference on Signal, Networks, Computing, and Systems
Verlag: Springer India
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Abstract
The performance of 2D wavelength/time optical code division multiple access (OCDMA) system is adversely affected by the presence of noise at its physical layer. It is present in the form of Multiple Access Interference (MAI) and beat noise in OCDMA systems and degrades its performance. In this paper an attempt has been made to determine as well as to mitigate the effect of noise using either Optical Hard Limiter (OHL) or Coherent detection technique for a system employing prime sequence permutations over time spreading optical orthogonal codes (OOCs). Investigations reveal that performance of system is severely affected by noise and it can be improved by using coherent detection as well as hard limiter. Specifically for this PC/OOC coding technique, it has been reported in the results that coherent detection for reducing the noise outperforms the use of optical hard limiter.