DFT-Precoded Coherent Optical OFDM with Hermitian Symmetry for Fiber Nonlinearity Mitigation

Minkyu Sung, Sungyong Kang, Jaemin Shim, Jae Hoon Lee, Jichai Jeong

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems have inferior nonlinear performance due to their high peak to average power ratio (PAPR) characteristics. In order to mitigate fiber nonlinearities for the CO-OFDM systems, we propose a novel discrete Fourier transform (DFT)-precoded coherent optical OFDM combined with a Hermitian symmetry (DFT-precoded HS CO-OFDM) system, which is a combination of the DFT-spread OFDM and the Hermitian symmetry of the DFT. Furthermore, the proposed system can be easily implemented by using a fast Fourier transform (FFT) algorithm. Because the proposed system has a lower PAPR than the conventional CO-OFDM system, the DFT-precoded HS CO-OFDM system provides superior nonlinear tolerance. Moreover, the proposed system is superior to the conventional DFT-spread coherent optical OFDM (DFT-spread CO-OFDM) system in terms of maintaining low PAPR in optical fiber transmission. The low PAPR in the proposed scheme is suitable for long-haul optical transmission systems, compared with the conventional DFT-spread CO-OFDM. For the DFT-precoded HS OFDM system, we have developed a theoretical framework illustrating the principles of the proposed system. The numerical results show that the DFT-precoded HS CO-OFDM system outperforms the conventional CO-OFDM by 5.4% EVM performance after 1200-km transmission and the conventional DFT-spread CO-OFDM by 4.5% EVM performance after 2800-km transmission at a fiber launch power of — 2 dBm.

Original languageEnglish
Pages (from-to)2757-2763
Number of pages7
JournalJournal of Lightwave Technology
Volume30
Issue number17
DOIs
Publication statusPublished - 2012

Fingerprint

frequency division multiplexing
nonlinearity
fibers
symmetry
optical fibers

Keywords

  • Coherent communications
  • fiber-optic transmission systems
  • optical nonlinear effect
  • orthogonal frequency-division multiplexing
  • peak to average power ratio

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

DFT-Precoded Coherent Optical OFDM with Hermitian Symmetry for Fiber Nonlinearity Mitigation. / Sung, Minkyu; Kang, Sungyong; Shim, Jaemin; Lee, Jae Hoon; Jeong, Jichai.

In: Journal of Lightwave Technology, Vol. 30, No. 17, 2012, p. 2757-2763.

Research output: Contribution to journalArticle

@article{18e5cae00b364dfcad255c216b0901fe,
title = "DFT-Precoded Coherent Optical OFDM with Hermitian Symmetry for Fiber Nonlinearity Mitigation",
abstract = "Coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems have inferior nonlinear performance due to their high peak to average power ratio (PAPR) characteristics. In order to mitigate fiber nonlinearities for the CO-OFDM systems, we propose a novel discrete Fourier transform (DFT)-precoded coherent optical OFDM combined with a Hermitian symmetry (DFT-precoded HS CO-OFDM) system, which is a combination of the DFT-spread OFDM and the Hermitian symmetry of the DFT. Furthermore, the proposed system can be easily implemented by using a fast Fourier transform (FFT) algorithm. Because the proposed system has a lower PAPR than the conventional CO-OFDM system, the DFT-precoded HS CO-OFDM system provides superior nonlinear tolerance. Moreover, the proposed system is superior to the conventional DFT-spread coherent optical OFDM (DFT-spread CO-OFDM) system in terms of maintaining low PAPR in optical fiber transmission. The low PAPR in the proposed scheme is suitable for long-haul optical transmission systems, compared with the conventional DFT-spread CO-OFDM. For the DFT-precoded HS OFDM system, we have developed a theoretical framework illustrating the principles of the proposed system. The numerical results show that the DFT-precoded HS CO-OFDM system outperforms the conventional CO-OFDM by 5.4{\%} EVM performance after 1200-km transmission and the conventional DFT-spread CO-OFDM by 4.5{\%} EVM performance after 2800-km transmission at a fiber launch power of — 2 dBm.",
keywords = "Coherent communications, fiber-optic transmission systems, optical nonlinear effect, orthogonal frequency-division multiplexing, peak to average power ratio",
author = "Minkyu Sung and Sungyong Kang and Jaemin Shim and Lee, {Jae Hoon} and Jichai Jeong",
year = "2012",
doi = "10.1109/JLT.2012.2206795",
language = "English",
volume = "30",
pages = "2757--2763",
journal = "Journal of Lightwave Technology",
issn = "0733-8724",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "17",

}

TY - JOUR

T1 - DFT-Precoded Coherent Optical OFDM with Hermitian Symmetry for Fiber Nonlinearity Mitigation

AU - Sung, Minkyu

AU - Kang, Sungyong

AU - Shim, Jaemin

AU - Lee, Jae Hoon

AU - Jeong, Jichai

PY - 2012

Y1 - 2012

N2 - Coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems have inferior nonlinear performance due to their high peak to average power ratio (PAPR) characteristics. In order to mitigate fiber nonlinearities for the CO-OFDM systems, we propose a novel discrete Fourier transform (DFT)-precoded coherent optical OFDM combined with a Hermitian symmetry (DFT-precoded HS CO-OFDM) system, which is a combination of the DFT-spread OFDM and the Hermitian symmetry of the DFT. Furthermore, the proposed system can be easily implemented by using a fast Fourier transform (FFT) algorithm. Because the proposed system has a lower PAPR than the conventional CO-OFDM system, the DFT-precoded HS CO-OFDM system provides superior nonlinear tolerance. Moreover, the proposed system is superior to the conventional DFT-spread coherent optical OFDM (DFT-spread CO-OFDM) system in terms of maintaining low PAPR in optical fiber transmission. The low PAPR in the proposed scheme is suitable for long-haul optical transmission systems, compared with the conventional DFT-spread CO-OFDM. For the DFT-precoded HS OFDM system, we have developed a theoretical framework illustrating the principles of the proposed system. The numerical results show that the DFT-precoded HS CO-OFDM system outperforms the conventional CO-OFDM by 5.4% EVM performance after 1200-km transmission and the conventional DFT-spread CO-OFDM by 4.5% EVM performance after 2800-km transmission at a fiber launch power of — 2 dBm.

AB - Coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems have inferior nonlinear performance due to their high peak to average power ratio (PAPR) characteristics. In order to mitigate fiber nonlinearities for the CO-OFDM systems, we propose a novel discrete Fourier transform (DFT)-precoded coherent optical OFDM combined with a Hermitian symmetry (DFT-precoded HS CO-OFDM) system, which is a combination of the DFT-spread OFDM and the Hermitian symmetry of the DFT. Furthermore, the proposed system can be easily implemented by using a fast Fourier transform (FFT) algorithm. Because the proposed system has a lower PAPR than the conventional CO-OFDM system, the DFT-precoded HS CO-OFDM system provides superior nonlinear tolerance. Moreover, the proposed system is superior to the conventional DFT-spread coherent optical OFDM (DFT-spread CO-OFDM) system in terms of maintaining low PAPR in optical fiber transmission. The low PAPR in the proposed scheme is suitable for long-haul optical transmission systems, compared with the conventional DFT-spread CO-OFDM. For the DFT-precoded HS OFDM system, we have developed a theoretical framework illustrating the principles of the proposed system. The numerical results show that the DFT-precoded HS CO-OFDM system outperforms the conventional CO-OFDM by 5.4% EVM performance after 1200-km transmission and the conventional DFT-spread CO-OFDM by 4.5% EVM performance after 2800-km transmission at a fiber launch power of — 2 dBm.

KW - Coherent communications

KW - fiber-optic transmission systems

KW - optical nonlinear effect

KW - orthogonal frequency-division multiplexing

KW - peak to average power ratio

UR - http://www.scopus.com/inward/record.url?scp=85008581851&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85008581851&partnerID=8YFLogxK

U2 - 10.1109/JLT.2012.2206795

DO - 10.1109/JLT.2012.2206795

M3 - Article

AN - SCOPUS:85008581851

VL - 30

SP - 2757

EP - 2763

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

SN - 0733-8724

IS - 17

ER -