NOMA and OMA-Based Massive MIMO and Clustering Algorithms for Beyond 5G IoT Networks

Table 1

Distinction between OMA and NOMA.

Specifications	OMA	NOMA
Full form	Orthogonal multiple access	Nonorthogonal multiple access
Energy consumption	Less	More
Receiver complexity	Low	High
Number of user pairs	More	Less
Number of users/clusters	Higher	Lower
System throughput (assumption: user fairness is guaranteed)	Smaller	Larger