A pragmatic coded modulation system is presented that incorporates signalshaping and exploits the excellent performance and efficient high-speeddecoding architecture of staircase codes. Reliable communication within 0.62bits/s/Hz of the estimated capacity (per polarization) of a system with L=2000km is provided by the proposed system, with an error floor below 1E-20. Also,it is shown that digital backpropagation increases the achievable spectralefficiencies---relative to linear equalization---by 0.55 to 0.75 bits/s/Hz perpolarization.
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机译：提出了一种实用的编码调制系统，该系统结合了信号处理功能并利用了阶梯码的出色性能和高效的高速解码架构。所提出的系统提供了在L = 2000km的系统的估计容量（每个极化）的0.62bits / s / Hz范围内的可靠通信，其错误基底低于1E-20。此外，还表明，数字反向传播将可实现的频谱效率（相对于线性均衡）提高了0.55至0.75位/ s / Hz的全极化。
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