CLC number: TN929.5
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2019-12-12
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Citations: Bibtex RefMan EndNote GB/T7714
Fei-yan Tian, Xiao-ming Chen. Multiple-antenna techniques in nonorthogonal multiple access: a review[J]. Frontiers of Information Technology & Electronic Engineering, 2019, 20(12): 1665-1697.
@article{title="Multiple-antenna techniques in nonorthogonal multiple access: a review",
author="Fei-yan Tian, Xiao-ming Chen",
journal="Frontiers of Information Technology & Electronic Engineering",
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pages="1665-1697",
year="2019",
publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.1900405"
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Abstract: As a promising physical layer technique, nonorthogonal multiple access (NOMA) can admit multiple users over the same space-time resource block, and thus improve the spectral efficiency and increase the number of access users. Specifically, NOMA provides a feasible solution to massive internet of Things (IoT) in 5G and beyond-5G wireless networks over a limited radio spectrum. However, severe co-channel interference and high implementation complexity hinder its application in practical systems. To solve these problems, multiple-antenna techniques have been widely used in NOMA systems by exploiting the benefits of spatial degrees of freedom. This study provides a comprehensive review of various multiple-antenna techniques in NOMA systems, with an emphasis on spatial interference cancellation and complexity reduction. In particular, we provide a detailed investigation on multiple-antenna techniques in two-user, multiuser, massive connectivity, and heterogeneous NOMA systems. Finally, future research directions and challenges are identified.
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