Comparison of Quaternary Block-Coding and Sphere-Cutting for High-Dimensional Modulation

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Span loss budget vs launch power for intra-channel spectral efficiencies of 5 b/s/Hz.

We propose quaternary block coded high-dimensional modulation formats and compare them to spherical lattice-cut and hybrid modulation formats. Noise tolerance and transmission performance are simulated for spectral efficiencies ranging between those of DP-QPSK and DP-8QAM. Similar performance to sphere-cutting is attained with lower DAC resolution.