Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System

Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System

We investigate the beamforming for the multi antenna cooperative non-orthogonal multiple access (NOMA) system, where an access point (AP) delivers messages for multiple user terminals (UT) with successive interference cancellation (SIC) reception method. Some UTs with multiple antennas cooperate wit...

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Main Authors: Duckdong Hwang, Janghoon Yang, Sung Sik Nam, Hyoung-Kyu Song
Format: Article
Language:English
Published: MDPI AG 2021-03-01
Series:Applied Sciences
Subjects:
beamforming
non-orthogonal multiple access
cooperation
diversity gain
Online Access:https://www.mdpi.com/2076-3417/11/5/2203
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spelling doaj-9032678671fb442a8aff7619ba3504e32021-03-04T00:01:18ZengMDPI AGApplied Sciences2076-34172021-03-01112203220310.3390/app11052203Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access SystemDuckdong Hwang0Janghoon Yang1Sung Sik Nam2Hyoung-Kyu Song3Department of Information and Communication Engineering, Sejong University, Seoul 05006, KoreaAI Software Engineering, Seoul Media Institute of Technology, Seoul 07590, KoreaResearch and Business Development Foundation, Gacheon University, Sungnam 13306, KoreaDepartment of Information and Communication Engineering and Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, KoreaWe investigate the beamforming for the multi antenna cooperative non-orthogonal multiple access (NOMA) system, where an access point (AP) delivers messages for multiple user terminals (UT) with successive interference cancellation (SIC) reception method. Some UTs with multiple antennas cooperate with the AP transmission to improve the diversity and the average power performance. We formally present two optimal beamforming schemes at the AP and at the cooperative UTs. One scheme has no power limitation for the cooperative UTs, while the other one does have such limitation. We guarantee that the rank one beamformer is sufficient to achieve the optimal points so that the proposed schemes have rank one semi-definite programming (SDP) structure. Simulation results show the performance gain of the multi-antenna cooperative NOMA schemes in the sense of diversity and the average power.https://www.mdpi.com/2076-3417/11/5/2203beamformingnon-orthogonal multiple accesscooperationdiversity gain
collection DOAJ
language English
format Article
sources DOAJ
author Duckdong Hwang
Janghoon Yang
Sung Sik Nam
Hyoung-Kyu Song
spellingShingle Duckdong Hwang
Janghoon Yang
Sung Sik Nam
Hyoung-Kyu Song
Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
Applied Sciences
beamforming
non-orthogonal multiple access
cooperation
diversity gain
author_facet Duckdong Hwang
Janghoon Yang
Sung Sik Nam
Hyoung-Kyu Song
author_sort Duckdong Hwang
title Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
title_short Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
title_full Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
title_fullStr Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
title_full_unstemmed Optimal Multi-Antenna Transmission for the Cooperative Non-Orthogonal Multiple-Access System
title_sort optimal multi-antenna transmission for the cooperative non-orthogonal multiple-access system
publisher MDPI AG
series Applied Sciences
issn 2076-3417
publishDate 2021-03-01
description We investigate the beamforming for the multi antenna cooperative non-orthogonal multiple access (NOMA) system, where an access point (AP) delivers messages for multiple user terminals (UT) with successive interference cancellation (SIC) reception method. Some UTs with multiple antennas cooperate with the AP transmission to improve the diversity and the average power performance. We formally present two optimal beamforming schemes at the AP and at the cooperative UTs. One scheme has no power limitation for the cooperative UTs, while the other one does have such limitation. We guarantee that the rank one beamformer is sufficient to achieve the optimal points so that the proposed schemes have rank one semi-definite programming (SDP) structure. Simulation results show the performance gain of the multi-antenna cooperative NOMA schemes in the sense of diversity and the average power.
topic beamforming
non-orthogonal multiple access
cooperation
diversity gain
url https://www.mdpi.com/2076-3417/11/5/2203
work_keys_str_mv AT duckdonghwang optimalmultiantennatransmissionforthecooperativenonorthogonalmultipleaccesssystem
AT janghoonyang optimalmultiantennatransmissionforthecooperativenonorthogonalmultipleaccesssystem
AT sungsiknam optimalmultiantennatransmissionforthecooperativenonorthogonalmultipleaccesssystem
AT hyoungkyusong optimalmultiantennatransmissionforthecooperativenonorthogonalmultipleaccesssystem
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