On the Sum Rate of MIMO-NOMA and MIMO-OMA Systems

In this letter, the performance of non-orthogonal multiple access (NOMA) is compared with conventional orthogonal multiple access (OMA) over multiple-input multiple-output (MIMO) channels. It is proved analytically that for a simple scenario of two users, MIMO-NOMA dominates MIMO-OMA in terms of bot...

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Bibliographic Details
Published inIEEE wireless communications letters Vol. 6; no. 4; pp. 534 - 537
Main Authors Ming Zeng, Yadav, Animesh, Dobre, Octavia A., Tsiropoulos, Georgios I., Poor, H. Vincent
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 01.08.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
5G systems
Array signal processing
Beamforming
channel capacity
Computer simulation
Downlink
Electronic mail
Interference
MIMO
MIMO (control systems)
multiple-input multiple-output (MIMO)
NOMA
Non-orthogonal multiple access (NOMA)
Nonorthogonal multiple access
Silicon carbide
sum rate
user pairing
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Summary:In this letter, the performance of non-orthogonal multiple access (NOMA) is compared with conventional orthogonal multiple access (OMA) over multiple-input multiple-output (MIMO) channels. It is proved analytically that for a simple scenario of two users, MIMO-NOMA dominates MIMO-OMA in terms of both sum rate and ergodic sum rate. Furthermore, for a more practical scenario of multiple users, with two users paired into a cluster and sharing a common transmit beamforming vector, the conclusion still holds. Numerical simulations are conducted, which corroborate the analytical findings.
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content type line 14
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2017.2712149