In a 350 Gbit/s DP-64QAM experiment over 1610 km of SSMF, enumerative sphere shaping with blocklength 200 achieves a 15% reach increase over constant composition distribution matching at the same blocklength.
Bandwidth efficient and rate-matched low-density parity-check coded modulation,
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First Experimental Demonstration of Probabilistic Enumerative Sphere Shaping in Optical Fiber Communications
In a 350 Gbit/s DP-64QAM experiment over 1610 km of SSMF, enumerative sphere shaping with blocklength 200 achieves a 15% reach increase over constant composition distribution matching at the same blocklength.