Novel pilot scheme for transmitter IQ mismatch compensation in CO-OFDM system

Jaehoon Lee, Youngsun Ha, Beom Soo Shin, Sungchul Kim, Beop Min Kim, Wonzoo Chung

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Transmitter in-phase and quadrature (Tx IQ) mismatch is one of the major obstacles preventing coherent optical orthogonal frequency division multiplexing systems from achieving high data rates. Several Tx IQ mismatch compensation methods at the receiver side have been proposed based on the mismatch estimation by the use of pilot signals. In this letter, we propose a novel pilot system for the Tx IQ mismatch estimation to improve the channel-estimation performance. The pilot scheme exploits the conjugate redundancy of the subcarrier mirror images due to the Tx IQ mismatch and allows the estimation of the Tx IQ mismatch factor and channel parameter independently. The advantages of the proposed algorithm are proved via mean square error analysis, and the bit error rate improvement is shown in simulations.

Original languageEnglish
Article number6236002
Pages (from-to)1543-1545
Number of pages3
JournalIEEE Photonics Technology Letters
Volume24
Issue number17
DOIs
Publication statusPublished - 2012

Bibliographical note

Funding Information:
Manuscript received March 26, 2012; revised June 23, 2012; accepted June 25, 2012. Date of publication July 10, 2012; date of current version August 10, 2012. This work was supported in part by the Basic Science Research Program through the NRF funded by the MEST 2010-0025437. J. Lee, Y. Ha, B.-S. Shin, and W. Chung are with the Division of Computer and Communications Engineering, Korea University, Seoul 136-701, Korea (e-mail: ejhoon@korea.ac.kr). S. Kim is with the Department of Communication Engineering, Myongji University, Yongin 449-728, Korea. B.-M. Kim is with the Department of Biomedical Engineering, Korea University, Seoul 136-701, Korea. Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2012.2207714

Keywords

  • Coherent communication
  • in-phase and quadrature mismatch
  • optical orthogonal frequency division multiplexing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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