Paper Info
Title
Capacity Comparison between MIMO-NOMA and MIMO-OMA with Multiple Users in a Cluster.
Abstract
In this paper, the performance of multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) is investigated, when multiple users are grouped into a cluster. The superiority of MIMO-NOMA over MIMO-OMA in terms of both sum channel capacity and ergodic sum capacity is proved analytically. Furthermore, it is demonstrated that the more users are admitted to a cluster, the lower is the achieved sum rate, which illustrates the tradeoff between the sum rate and maximum number of admitted users. On this basis, a user admission scheme is proposed, which is optimal in terms of both sum rate and the number of admitted users when the signal-to-interference-plus-noise ratio thresholds of the users are equal. When these thresholds are different, the proposed scheme still achieves good performance in balancing both criteria. Moreover, under certain conditions, it maximizes the number of admitted users. In addition, the complexity of the proposed scheme is linear in the number of users per cluster. Simulation results verify the superiority of MIMO-NOMA over MIMO-OMA in terms of both sum rate and user fairness, as well as the effectiveness of the proposed user admission scheme.
Year
DOI
Venue
2017
10.1109/JSAC.2017.2725879
IEEE Journal on Selected Areas in Communications
Keywords
DocType
Volume
NOMA,Interference,MIMO,Resource management,Channel capacity,Signal to noise ratio,Simulation
Journal
abs/1706.02731
Issue
ISSN
Citations 
10
0733-8716
39
PageRank 
References 
Authors
1.18
14
5
Name
Order
Citations
PageRank
Ming Zeng117017.38
Animesh Yadav214514.18
Octavia A. Dobre32064181.08
Georgios Tsiropoulos41569.82
H. V. Poor5254111951.66