An Efficient and Robust Pairwise Optimization Search Algorithm of Modulation Constellations for Probabilistic Amplitude Shaping Architecture

We propose a general modified pairwise optimization (MPO) search algorithm. The simulation results show the performance of PS-MPO-16QAM has a gain of 0.2 bit/symbol over 16QAM and 0.05 bit/symbol over PS-16QAM, respectively.