Experimental investigation of a four-dimensional 256-ary lattice-based modulation format

@article{Eriksson2015ExperimentalIO,
  title={Experimental investigation of a four-dimensional 256-ary lattice-based modulation format},
  author={Tobias A. Eriksson and Saleem Alreesh and Carsten Schmidt-Langhorst and Felix Frey and Pablo Wilke Berenguer and Colja Schubert and Johannes Karl Fischer and Peter A. Andrekson and Magnus Karlsson and Erik Agrell},
  journal={2015 Optical Fiber Communications Conference and Exhibition (OFC)},
  year={2015},
  pages={1-3}
}
A four-dimensional modulation format with 256 point from the D<sub>4</sub>-lattice (256-D<sub>4</sub>) is compared to PM-16QAM in experiments. 256-D<sub>4</sub> is more sensitive at high OSNR but with a 21.3% overhead turbo product code, PM-16QAM outperforms 256-D<sub>4</sub>. 

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