Abstract

A pragmatic coded modulation system is presented that incorporates signal shaping and exploits the excellent performance and efficient high-speed decoding architecture of staircase codes. Reliable communication within 0.62 bits/s/Hz of the estimated capacity (per polarization) of a system with <i>L</i>=2000 km is provided by the proposed system, with an error floor below 10^-20. Also, it is shown that digital backpropagation increases the achievable spectral efficiencies—relative to linear equalization—by 0.55 to 0.75 bits/s/Hz per polarization.

© 2012 IEEE

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