Abstract:

The cellular communication technology has undergone five generations of evolution, yet its multiple access technologies as one of the key physical layer technologies still belongs among the orthognal multiple access technology. The legacy orthognal multiple access technology might have approached the ceiling of spectrum effeciency and system capacity in realistic senario. Non-orthogonal multiple access is an emerging design of physical layer, which can break the limitaion of finite orthogonal resource, fortifying transmission performance, increasing the system capacity, reducing latency and lower power comsuption. Non-orthogonal multiple access has become a highlighted research subject in the last decade,which leads to a large number of research finds. Non-orthogonal multiple access technology now is one of candidate technologies of 5G physical layer, which is under intensive discussion in the 3GPP organization.

Key words: 5G, NOMA, power domain multiplexing, SIC