Predicting Nonlinear Interference for Short-Blocklength 4D Probabilistic Shaping

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Feb 28, 2025
Jingxin Deng, Bin Chen, Zhiwei Liang, Yi Lei, Gabriele Liga

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We derive a heuristic nonlinear interference model for 4D probabilistic shaping considering the polarization and time correlation of the 4D symbols. We demonstrate an average SNR prediction gap from split-step Fourier simulations of 0.15~dB.

* 3 pages, 4 figures  
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