Runyu Lyu Wenchi Cheng Muyao Wang Wei Zhang 0001 Fractal OAM Generation and Detection Schemes. 1598-1612 2024 June 42 IEEE J. Sel. Areas Commun. 6 https://doi.org/10.1109/JSAC.2024.3389118 db/journals/jsac/jsac42.html#LyuCWZ24