@phdthesis{TUW-303927, author = {Tahir, Bashar}, title = {Towards Massive Connectivity via Uplink Code-Domain NOMA}, school = {Institute of Telecommunications}, year = {2022}, doi = {10.34726/hss.2022.80621}, keywords = {non-orthogonal multiple access; massive connectivity; code-domain; grant-free; reconfigurable intelligent surface; NOMA; RIS} }