Information Rate of Probabilistically Shaped QAM with Non-Ideal Forward Error Correction
Junho Cho, Samuel L. I. Olsson, S. Chandrasekhar, Peter J. Winzer · 2018
Simulations and experiments using probabilistically shaped QAM quantify the impact of nonideal coding on the information rate. A coding gap induces an information rate loss that increases with the underlying constellation size, favoring lower-order QAM templates.