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

doi:10.1109/LPT.2012.2207714

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 journal › Article › peer-review

15 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 language	English
Article number	6236002
Pages (from-to)	1543-1545
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	24
Issue number	17
DOIs	https://doi.org/10.1109/LPT.2012.2207714
Publication status	Published - 2012

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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10.1109/LPT.2012.2207714

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title = "Novel pilot scheme for transmitter IQ mismatch compensation in CO-OFDM system",

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.",

keywords = "Coherent communication, in-phase and quadrature mismatch, optical orthogonal frequency division multiplexing",

author = "Jaehoon Lee and Youngsun Ha and Shin, {Beom Soo} and Sungchul Kim and Kim, {Beop Min} and Wonzoo Chung",

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",

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language = "English",

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AU - Lee, Jaehoon

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AU - Kim, Sungchul

AU - Kim, Beop Min

AU - Chung, Wonzoo

N1 - 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

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AB - 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.

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

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