DCT-precoding technique in optical fast OFDM for mitigating fiber nonlinearity

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We construct a discrete Fourier transform (DFT)-precoded optical fast orthogonal frequency division multiplexing (FOFDM) system. However, the DFT-precoded FOFDM system requires a higher modulation order (M2) compared with the conventional FOFDM system (M) owing to the complex conjugate data. The higher modulation order results in an increase in the peak-to-average power ratio (PAPR), which degrades the nonlinear tolerance. To overcome this problem, we propose a discrete cosine transform (DCT)-precoded optical FOFDM system. The proposed system does not require a higher modulation order. Therefore, the proposed DCT-precoded optical FOFDM system has a lower PAPR characteristic than the DFT-precoded FOFDM system. The lowest PAPR characteristic of the proposed system enables superior nonlinear tolerance compared with other FOFDM systems. The numerical results show that the proposed system outperforms the conventional FOFDM system by an optical signal-to-noise ratio of 2 dB at 3.8× 10-3~BER for an 800-km transmission.

Original languageEnglish
Article number6607179
Pages (from-to)2209-2212
Number of pages4
JournalIEEE Photonics Technology Letters
Volume25
Issue number22
DOIs
Publication statusPublished - 2013 Nov 14

Fingerprint

frequency division multiplexing
discrete cosine transform
Discrete cosine transforms
Orthogonal frequency division multiplexing
nonlinearity
fibers
Fibers
Discrete Fourier transforms
Modulation
modulation
optical communication
Signal to noise ratio
signal to noise ratios

Keywords

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

ASJC Scopus subject areas

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

Cite this

DCT-precoding technique in optical fast OFDM for mitigating fiber nonlinearity. / Sung, Minkyu; Lee, Jae Hoon; Jeong, Jichai.

In: IEEE Photonics Technology Letters, Vol. 25, No. 22, 6607179, 14.11.2013, p. 2209-2212.

Research output: Contribution to journalArticle

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AB - We construct a discrete Fourier transform (DFT)-precoded optical fast orthogonal frequency division multiplexing (FOFDM) system. However, the DFT-precoded FOFDM system requires a higher modulation order (M2) compared with the conventional FOFDM system (M) owing to the complex conjugate data. The higher modulation order results in an increase in the peak-to-average power ratio (PAPR), which degrades the nonlinear tolerance. To overcome this problem, we propose a discrete cosine transform (DCT)-precoded optical FOFDM system. The proposed system does not require a higher modulation order. Therefore, the proposed DCT-precoded optical FOFDM system has a lower PAPR characteristic than the DFT-precoded FOFDM system. The lowest PAPR characteristic of the proposed system enables superior nonlinear tolerance compared with other FOFDM systems. The numerical results show that the proposed system outperforms the conventional FOFDM system by an optical signal-to-noise ratio of 2 dB at 3.8× 10-3~BER for an 800-km transmission.

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