What question did this study set out to answer?

To evaluate the validity of using a channel-independent soft-decision forward error correction (FEC) limit in optical communication systems and propose a more accurate design metric.

January 15, 2016Journal of Lightwave Technology

Replacing the Soft-Decision FEC Limit Paradigm in the Design of Optical Communication Systems

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Authors

AAAlex AlvaradoEindhoven University of Technology EAErik AgrellMax Planck Institute for Gravitational Physics DLDomaniç LaveryInfinera (United States)

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Implication

Simulation and experimental study reveals soft-decision FEC limits fail in optical communication, indicating generalized mutual information enables superior system design.

Key Points

To evaluate the validity of using a channel-independent soft-decision forward error correction (FEC) limit in optical communication systems and propose a more accurate design metric.
Conducted theoretical analysis comparing pre-FEC bit error rate (BER) thresholds to generalized mutual information across diverse modulation formats and channel conditions.
Performed optical full-field numerical simulations and experimental transmissions spanning both linear and nonlinear optical propagation regimes.
Demonstrated that channel-independent soft-decision FEC limits are invalid for bit-wise decoding, underestimating achievable spectral efficiencies by up to 20% in high-order modulation formats with low code rates.
Identified generalized mutual information as an effective and robust predictor of post-FEC BER performance across varying transmission environments.

Cite This Study

Alvarado et al. (2016) studied this question.

synapsesocial.com/papers/6a7d414ca7839e36ac1cd204 https://doi.org/10.1109/jlt.2015.2482718

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Implication

Simulation and experimental study reveals soft-decision FEC limits fail in optical communication, indicating generalized mutual information enables superior system design.

Replacing the Soft-Decision FEC Limit Paradigm in the Design of Optical Communication Systems

Discussion

Member takes

Implication

Key Points

Cite This Study

Replacing the Soft-Decision FEC Limit Paradigm in the Design of Optical Communication Systems

Discussion

Member takes

Implication

Key Points

Cite This Study

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