Fiber nonlinearity tolerance of APSK modulated DFT-S OFDM systems

Xiang Li, Wen De Zhong, Arokiaswami Alphones, Changyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


Discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S OFDM) was proposed in coherent optical OFDM (CO-OFDM) to improve the fiber nonlinearity tolerance in CO-OFDM transmission systems. In this letter, we propose to apply amplitude phase shift keying (APSK) modulation in DFT-S OFDM to further improve the fiber nonlinearity tolerance. We investigate the effects of several parameters on the transmission performance to determine the optimal values of these parameters. Compared with 16 quadrature amplitude modulation modulated DFT-S OFDM and 16-APSK (4 and 12 constellation points in the respective first and second rings) modulated CO-OFDM, the optimized 16-APSK (6 and 10 constellation points in the respective first and second rings) modulated DFT-S OFDM extends the maximum transmission reach by {\sim}{12\%} and {\sim}{19\%} for both nondispersion managed and dispersion managed links, respectively.
Original languageEnglish
Article number6648388
Pages (from-to)2304-2307
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number23
Publication statusPublished - 27 Nov 2013
Externally publishedYes


  • amplitude phase shift keying (APSK)
  • Orthogonal frequency division multiplexing (OFDM)
  • quadrature amplitude modulation (QAM)

ASJC Scopus subject areas

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

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