Polybinary Shaping for Highly-Spectral-Efficient Super-Nyquist WDM QAM Signals

Koji Igarashi; Takehiro Tsuritani; Itsuro Morita

doi:10.1109/JLT.2016.2524200

Polybinary Shaping for Highly-Spectral-Efficient Super-Nyquist WDM QAM Signals

Koji Igarashi, Takehiro Tsuritani, Itsuro Morita

Research output: Contribution to journal › Article › peer-review

27 Citations (Scopus)

Abstract

In Super-Nyquist wavelength-division multiplexed (WDM) systems, in which WDM channel spacing is smaller than a signal baudrate, there is a tradeoff relationship between the WDM crosstalk and inter-symbol interference due to the tight spectral shaping. For optimizing the tradeoff relationship, polybinary shaping with maximum likelihood sequence estimation is introduced. In this paper, we numerically and experimentally investigate the bit-error rate characteristics of the Super-Nyquist WDM quadrature amplitude modulated signals with polybinary shaping in order to clarify the relationship between the spectral efficiency and required signal-to-noise ratio (SNR). These results indicate that the Super-Nyquist WDM technique based on polybinary shaping is effective to optimize the spectral efficiency for the target required SNR equivalent to the target transmission distance.

Original language	English
Article number	7400909
Pages (from-to)	1724-1731
Number of pages	8
Journal	Journal of Lightwave Technology
Volume	34
Issue number	8
DOIs	https://doi.org/10.1109/JLT.2016.2524200
Publication status	Published - 2016 Apr 15
Externally published	Yes

Keywords

digital signal processing
spectral processing
wavelength division multiplexing

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1109/JLT.2016.2524200

Cite this

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title = "Polybinary Shaping for Highly-Spectral-Efficient Super-Nyquist WDM QAM Signals",

abstract = "In Super-Nyquist wavelength-division multiplexed (WDM) systems, in which WDM channel spacing is smaller than a signal baudrate, there is a tradeoff relationship between the WDM crosstalk and inter-symbol interference due to the tight spectral shaping. For optimizing the tradeoff relationship, polybinary shaping with maximum likelihood sequence estimation is introduced. In this paper, we numerically and experimentally investigate the bit-error rate characteristics of the Super-Nyquist WDM quadrature amplitude modulated signals with polybinary shaping in order to clarify the relationship between the spectral efficiency and required signal-to-noise ratio (SNR). These results indicate that the Super-Nyquist WDM technique based on polybinary shaping is effective to optimize the spectral efficiency for the target required SNR equivalent to the target transmission distance.",

keywords = "digital signal processing, spectral processing, wavelength division multiplexing",

author = "Koji Igarashi and Takehiro Tsuritani and Itsuro Morita",

note = "Publisher Copyright: {\textcopyright} 2016 IEEE.",

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AU - Tsuritani, Takehiro

AU - Morita, Itsuro

PY - 2016/4/15

Y1 - 2016/4/15

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Polybinary Shaping for Highly-Spectral-Efficient Super-Nyquist WDM QAM Signals

Abstract

Keywords

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