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Experimental Investigation of a Four-Dimensional 256-ary Lattice-based Modulation Format

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A four-dimensional modulation format with 256 point from the D4-lattice (256-D4) is compared to PM-16QAM in experiments. 256-D4 is more sensitive at high OSNR but with a 21.3% overhead turbo product code, PM-16QAM outperforms 256-D4.

© 2015 Optical Society of America

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