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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 19 — Sep. 23, 2013
  • pp: 22847–22853

A performance investigation of correlation-based and pilot-tone-assisted frequency offset compensation method for CO-OFDM

Shengjiao Cao, Changyuan Yu, and Pooi-Yuen Kam  »View Author Affiliations

Optics Express, Vol. 21, Issue 19, pp. 22847-22853 (2013)

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We carry out a comprehensive analysis to examine the performance of our recently proposed correlation-based and pilot-tone-assisted frequency offset compensation method in coherent optical OFDM system. The frequency offset is divided into two parts: fraction part and integer part relative to the channel spacing. Our frequency offset scheme includes the correlation-based Schmidl algorithm for fraction part estimation as well as pilot-tone-assisted method for integer part estimation. In this paper, we analytically derive the error variance of fraction part estimation methods in the presence of laser phase noise using different correlation-based algorithms: Schmidl, Cox and Cyclic Prefix based. This analytical expression is given for the first time in the literature. Furthermore, we give a full derivation for the pilot-tone-assisted integer part estimation method using the OFDM model.

© 2013 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: June 5, 2013
Revised Manuscript: July 18, 2013
Manuscript Accepted: August 10, 2013
Published: September 20, 2013

Shengjiao Cao, Changyuan Yu, and Pooi-Yuen Kam, "A performance investigation of correlation-based and pilot-tone-assisted frequency offset compensation method for CO-OFDM," Opt. Express 21, 22847-22853 (2013)

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