Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems

Shuai YUAN; Koji IGARASHI

doi:10.1587/transcom.2018EBP3179

Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems

Shuai YUAN, Koji IGARASHI

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In super-Nyquist wavelength division multiplexed systems, performance of forward error correction (FEC) can be improved by an iterative decoder between a maximum likelihood decoder for polybinary shaping and an FEC decoder. The typical iterative decoder includes not only the iteration between the first and second decoders but also the internal iteration within the FEC decoder. Such two-fold loop configuration would increase the computational complexity for decoding. In this paper, we propose the simplified iterative decoder, where the internal iteration in the FEC decoder is not performed, reducing the computational complexity. We numerically evaluate the bit-error rate performance of polybinary-shaped QPSK signals in the simplified iterative decoder. The numerical results show that the FEC performance can be improved in the simplified scheme, compared with the typical iterative decoder. In addition, the performance of the simplified iterative decoder has been investigated by the extrinsic information transfer (EXIT) chart.

Publication: IEICE TRANSACTIONS on Communications Vol.E102-B No.4 pp.818-823

Publication Date: 2019/04/01

Publicized: 2018/10/11

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2018EBP3179

Type of Manuscript: PAPER

Category: Fiber-Optic Transmission for Communications

Authors

Shuai YUAN
Graduate School of the Osaka University
Koji IGARASHI
Graduate School of the Osaka University

Keyword

wavelength division multiplexing, forward error correction, maximum likelihood decoder

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Shuai YUAN, Koji IGARASHI, "Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems" in IEICE TRANSACTIONS on Communications, vol. E102-B, no. 4, pp. 818-823, April 2019, doi: 10.1587/transcom.2018EBP3179.
Abstract: In super-Nyquist wavelength division multiplexed systems, performance of forward error correction (FEC) can be improved by an iterative decoder between a maximum likelihood decoder for polybinary shaping and an FEC decoder. The typical iterative decoder includes not only the iteration between the first and second decoders but also the internal iteration within the FEC decoder. Such two-fold loop configuration would increase the computational complexity for decoding. In this paper, we propose the simplified iterative decoder, where the internal iteration in the FEC decoder is not performed, reducing the computational complexity. We numerically evaluate the bit-error rate performance of polybinary-shaped QPSK signals in the simplified iterative decoder. The numerical results show that the FEC performance can be improved in the simplified scheme, compared with the typical iterative decoder. In addition, the performance of the simplified iterative decoder has been investigated by the extrinsic information transfer (EXIT) chart.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2018EBP3179/_p

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@ARTICLE{e102-b_4_818,
author={Shuai YUAN, Koji IGARASHI, },
journal={IEICE TRANSACTIONS on Communications},
title={Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems},
year={2019},
volume={E102-B},
number={4},
pages={818-823},
abstract={In super-Nyquist wavelength division multiplexed systems, performance of forward error correction (FEC) can be improved by an iterative decoder between a maximum likelihood decoder for polybinary shaping and an FEC decoder. The typical iterative decoder includes not only the iteration between the first and second decoders but also the internal iteration within the FEC decoder. Such two-fold loop configuration would increase the computational complexity for decoding. In this paper, we propose the simplified iterative decoder, where the internal iteration in the FEC decoder is not performed, reducing the computational complexity. We numerically evaluate the bit-error rate performance of polybinary-shaped QPSK signals in the simplified iterative decoder. The numerical results show that the FEC performance can be improved in the simplified scheme, compared with the typical iterative decoder. In addition, the performance of the simplified iterative decoder has been investigated by the extrinsic information transfer (EXIT) chart.},
keywords={},
doi={10.1587/transcom.2018EBP3179},
ISSN={1745-1345},
month={April},}

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TY - JOUR
TI - Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 818
EP - 823
AU - Shuai YUAN
AU - Koji IGARASHI
PY - 2019
DO - 10.1587/transcom.2018EBP3179
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E102-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2019
AB - In super-Nyquist wavelength division multiplexed systems, performance of forward error correction (FEC) can be improved by an iterative decoder between a maximum likelihood decoder for polybinary shaping and an FEC decoder. The typical iterative decoder includes not only the iteration between the first and second decoders but also the internal iteration within the FEC decoder. Such two-fold loop configuration would increase the computational complexity for decoding. In this paper, we propose the simplified iterative decoder, where the internal iteration in the FEC decoder is not performed, reducing the computational complexity. We numerically evaluate the bit-error rate performance of polybinary-shaped QPSK signals in the simplified iterative decoder. The numerical results show that the FEC performance can be improved in the simplified scheme, compared with the typical iterative decoder. In addition, the performance of the simplified iterative decoder has been investigated by the extrinsic information transfer (EXIT) chart.
ER -