List-Encoding CCDM: A Nonlinearity-Tolerant Shaper Aided by Energy Dispersion Index
نویسندگان
چکیده
Recently, a metric called energy dispersion index (EDI) was proposed to qualitatively indicate the nonlinear interference (NLI) induced by correlated symbols during optical transmission. In this paper, we propose new shaper architecture decrease EDI of transmitted and thus, increase signal-to-noise ratio (SNR). We call list-encoding constant-composition distribution matcher (L-CCDM). L-CCDM consists an additional selecting module, which is compatible with standard probabilistic amplitude shaping (PAS) architecture. Numerical results obtained from multi-span multi-channel system show that when compared CCDM 256-ary quadrature modulation (256QAM), offers effective SNR gain 0.35 dB, achievable information rate 0.22 b/4D-symbol, or equivalently 8% reach extension.
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ژورنال
عنوان ژورنال: Journal of Lightwave Technology
سال: 2022
ISSN: ['0733-8724', '1558-2213']
DOI: https://doi.org/10.1109/jlt.2021.3125783