Sensitivity gains by mismatched probabilistic shaping for optical communication systems

T. Fehenberger; D. Lavery; R. Maher; A. Alvarado; P. Bayvel; N. Hanik

doi:10.1109/LPT.2015.2514078

Sensitivity gains by mismatched probabilistic shaping for optical communication systems

T. Fehenberger, D. Lavery, R. Maher, A. Alvarado, P. Bayvel, N. Hanik

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Abstract

Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.

Original language	English
Pages (from-to)	786-789
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	28
Issue number	7
DOIs	https://doi.org/10.1109/LPT.2015.2514078
Publication status	Published - 1 Apr 2016

Keywords

Achievable information rates
digital coherent transceivers
digital signal processing
mutual information
probabilistic shaping
signal shaping

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10.1109/LPT.2015.2514078

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title = "Sensitivity gains by mismatched probabilistic shaping for optical communication systems",

abstract = "Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.",

keywords = "Achievable information rates, digital coherent transceivers, digital signal processing, mutual information, probabilistic shaping, signal shaping",

author = "T. Fehenberger and D. Lavery and R. Maher and A. Alvarado and P. Bayvel and N. Hanik",

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T1 - Sensitivity gains by mismatched probabilistic shaping for optical communication systems

AU - Fehenberger, T.

AU - Lavery, D.

AU - Maher, R.

AU - Alvarado, A.

AU - Bayvel, P.

AU - Hanik, N.

PY - 2016/4/1

Y1 - 2016/4/1

N2 - Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.

AB - Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.

KW - Achievable information rates

KW - digital coherent transceivers

KW - digital signal processing

KW - mutual information

KW - probabilistic shaping

KW - signal shaping

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DO - 10.1109/LPT.2015.2514078

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SP - 786

EP - 789

JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

IS - 7

ER -

Sensitivity gains by mismatched probabilistic shaping for optical communication systems

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Keywords

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