Research on Precoding Enabled Geometrically Shaped 64-QAM Signal in Short-Reach DMT Transmission Systems

In short-reach DMT transmission systems, we proposed geometrically-shaped (GS) 64-QAM signal, which can achieve significant shaping gain while ensuring lower demodulation complexity. The results show that precoding enabled GS-64QAM DMT outperforms uniform 64-QAM DMT.