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Chromatic dispersion and nonlinear phase noise compensation based on KLMS method

Nouri, M ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.optcom.2015.04.037
  3. Publisher: Elsevier , 2015
  4. Abstract:
  5. In this study, kernel least mean square (KLMS) algorithm with fractionally spaced equalizing structure is proposed for electrical compensation of chromatic dispersion (CD) and nonlinear phase noise (NLPN) in a dual polarization optical communications system with coherent detection. We consider single mode fiber channel. At the receiver, the additive optical noise is represented as additive white Gaussian noise. Phase modification is utilized at high signal powers to maintain the validity of Gaussian model of noise. We consider QAM and PSK modulations and evaluate the performance of the proposed method in terms of error rate, phase error, and error vector magnitude (EVM). The results are obtained in both linear and nonlinear regimes. In the linear region, the KLMS algorithm can compensate CD and NLPN effectively and outperforms the existing compensation methods such as LMS, minimum mean square error (MMSE), and time domain FIR filter. In nonlinear regime, where the input power is higher, NLPN is stronger which results in compensation performance degradation. However, KLMS still achieves better results than the above algorithms
  6. Keywords:
  7. Chromatic dispersion (CD) ; Compensation ; Error vector magnitude (EVM) ; Kernel least mean square (KLMS) ; Nonlinear phase noise (NLPN) ; Algorithms ; Compensation (personnel) ; Error compensation ; Errors ; Gaussian noise (electronic) ; Mean square error ; Optical communication ; Phase noise ; Single mode fibers ; Time domain analysis ; White noise ; Additive White Gaussian noise ; Compensation performance ; Error rate ; Minimum mean square errors (MMSE) ; Optical communications systems ; Nonlinear optics
  8. Source: Optics Communications ; Volume 351 , September , 2015 , Pages 149-154 ; 00304018 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0030401815003260