The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis of Low Computational Complexity DSP Algorithm for Phase Noise Compensation in Coherent Optical Communication Systems

코히어런트 광통신에서 위상잡음 보상을 위한 저계산 복잡도 DSP 알고리즘 제안 및 분석

  • Park, Hyoung-Joon (Broadband Transmission Network Lab, Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Jung, Sang-Min (Broadband Transmission Network Lab, Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Han, Dong-Yoon (Broadband Transmission Network Lab, Department of Electrical and Electronic Engineering, Yonsei University) ;
  • Han, Sang-Kook (Broadband Transmission Network Lab, Department of Electrical and Electronic Engineering, Yonsei University)
  • Received : 2014.02.11
  • Accepted : 2014.04.29
  • Published : 2014.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

In coherent superhigh speed optical transmission link, compensating the system impairments are critical issues. Among these issues, phase noise and carrier frequency offset are the most important impairments which interrupt the signal recovery. This paper suggests a algorithm of digital signal processing that compensates the phase noise and carrier frequency offset and verified its validity. The suggested digital signal processing algorithm has a lower computational complexity compared with the previous algorithms, so it can ease the burden of signal processing at the receiver to provide high speed optical transmission system.

코히어런트 초고속 광전송 링크에서는 성능을 열화시키는 잡음요소를 제거하는 것이 더욱 중요하게 대두되고 있다. 그 중 위상잡음과 주파수 오프셋은 위상문제를 일으키는 잡음으로, 신호 처리를 방해하는데 가장 주요한 요인이다. 본 논문에서는 디지털 신호처리 방법을 이용하여 위상잡음과 주파수 오프셋을 보상하는 방법을 제안하였으며 시뮬레이션을 통해 타당성을 검증하였다. 제안된 알고리즘은 기존의 보상 방법들보다 계산 복잡도를 낮추어, 신호 처리속도가 중요한 초고속 코히어런트 광전송 시스템에 있어서 수신기의 신호처리 부담을 완화하였다.

Keywords

References

  1. D.-H. Kim, D.-W. Lee, Y.-W. Won, S.-J. Park, and S.-K. Han, "Demonstration of RSOA based Bidirectional WDM-PON by using Suppressed Optical Carrier Modulation," J. KICS, vol. 32, no. 12, Dec. 2007.
  2. G. Raybon and P. J. Winzer, "100 Gb/s challenges and solutions," in Proc. Optical Fiber Commun., San Diego, CA, Feb. 2008.
  3. G. Colavolpe, T. Foggi, E. Forestieri, and M. Secondini, "Phase noise sensitivity and compensation techniques in long-haul coherent optical links," in Proc. IEEE Global Telecommun., Miami, FL, pp. 1-6, Dec. 2010.
  4. U. Mengali and A. N. D'Andrea, Synchronization Techniques for Digital Receivers (Applications of Communications Theory), NewYork: Plenum Press, 1997.
  5. A. Y. Erdogan, Analysis of the effects of phase noise and frequency offset in orthogonal frequency division Multiplexing (OFDM) systems, Amazon Digital Services, Inc. Mar. 2012.
  6. J. C. Huh, H. K. Lee, D. H. Lee, and J. S. Seo, "Performance of mobile satlite communication systems in random vibration induced phase noise environment," in Proc. KICS, pp. 998-1001, Nov. 1999.
  7. J.-W. Kim, Y.-O. Park, and W.-W. Kim, "A joint frequency offset measurement using inversely repeated training symbol and cyclic prefix," J. KICS, vol. 36, no. 7, pp. 627-634, Jul. 2011. https://doi.org/10.7840/KICS.2011.36A.7.627