We propose partial multilevel coding (MLC) for optical communications with probabilistic shaping (PS), which improves the signal-to-noise ratio performance and makes information rates more adaptable, while reducing the power consumed by forward error correction. We designed simulation models of partial-MLC and bit-interleaved coded modulation (BICM) implementing the same low-density parity-check code to have almost the same transmission performance in an additive white Gaussian noise channel. The estimated power consumption of the partial-MLC model was about 38∼39% lower than that of the BICM model. Next, we evaluated the effect of nonlinearity on fiber wavelength division multiplexing (WDM) channels in numerical simulations. The results showed that both models behaved similarly regardless of nonlinear noise, illustrating the usefulness of MLC with PS for optical transmissions on WDM channels.

中文翻译：

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WDM信道传输的概率整形与部分多级编码的性能评估

我们提出了用于具有概率整形（PS）的光通信的部分多级编码（MLC），它提高了信噪比性能，并使信息速率更具适应性，同时减少了前向纠错所消耗的功率。我们设计了部分MLC和位交织编码调制（BICM）的仿真模型，这些模型实现了相同的低密度奇偶校验码，从而在加性高斯白噪声信道中具有几乎相同的传输性能。部分MLC模型的估计功耗比BICM模型的功耗低约38％至39％。接下来，我们在数值模拟中评估了非线性对光纤波分复用（WDM）通道的影响。结果表明，无论非线性噪声如何，两个模型的行为都相似。