360-Channel WDM-MDM Transmission over 25-km Ring-Core Fiber with Low-Complexity Modular 4×4 MIMO Equalization. - Zhenrui Lin; Junyi Liu; Jianpei Lin; Lei Shen; Jingxing Zhang; Junwei Zhang; Shuqi Mo; Peng Li; Lan Deng; Jie Liu; Siyuan Yu (OFC, 2021)