User selection and power schedule for downlink non-orthogonal multiple access (NOMA) system. - Shimei Liu; Chao Zhang; Gangming Lyu (ICC Workshops, 2015)

Downlink non-orthogonal multiple access system with limited feedback channel. - Shimei Liu; Chao Zhang (WCSP, 2015)

Non-orthogonal multiple access in a downlink multiuser beamforming system with limited CSI feedback. - Shimei Liu; Chao Zhang (EURASIP J. Wirel. Commun. Netw., 2016)