Paper Info
Title
Multiuser Selection Criteria for MIMO-NOMA Systems With Different Detectors
Abstract
Non-orthogonal multiple access (NOMA) is an effective way to improve the spectrum efficiency of multiple-input multiple-output (MIMO) systems, where this advancement can be fully exploited by employing a proper user selection strategy in the multiuser MIMO system. However, for multiuser scenarios, information-theoretic throughput may not be properly used as the performance indicator since the constraints at the receiver (e.g., suboptimal detectors) are not taken into consideration. In this paper, we adopt the error probability (EP) as the performance metric, which is equivalent to the practical throughput efficiency and can take the critical constraints into consideration. We analyze the pair-wise error probability (PEP) performance of different detectors and propose two kinds of user selection methods to minimize the PEP. To facilitate the detection performance evaluation, we further investigate the multiuser diversity of the proposed selection methods and derive a tight lower PEP bound for the case with randomly selected users. From the analytical and numerical results, we demonstrate that the proposed multiuser selection methods can suppress the inter-user interference effectively and achieve better performance than that of the state-of-the-art method.
Year
DOI
Venue
2020
10.1109/TVT.2019.2960591
IEEE Transactions on Vehicular Technology
Keywords
DocType
Volume
Multiple-input multiple-output (MIMO),signal detection,nonorthogonal multiple access (NOMA),user selection,pair-wise error probability (PEP)
Journal
69
Issue
ISSN
Citations 
2
0018-9545
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Quan Yu124123.72
Chao Han2157.41
Lin Bai326553.37
Jingchao Wang4191.68
Jinho Choi51642206.06
Xuemin Shen615389928.67