Partition-Based RIS-Assisted Multiple Access: NOMA Decoding Order Perspective

In this correspondence, we propose a closed-form resource allocation called partition-based multiple access (MA), which simultaneously utilizes both a reconfigurable intelligent surface (RIS) and non-orthogonal multiple access (NOMA) to reduce processing overhead and transmit power. The RIS can tune...

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Vydané v:IEEE transactions on vehicular technology Ročník 71; číslo 8; s. 9083 - 9088
Hlavní autori: Kim, Yonghwi, Kim, Jae-Hyun, Chae, Chan-Byoung
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.08.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Array signal processing
Closed form solutions
Complexity theory
Decoding
Exact solutions
Millimeter waves
Modal choice
multiple access
NOMA
non-orthogonal multiple access (NOMA)
Nonorthogonal multiple access
Power
Power management
Reconfigurable intelligent surface (RIS)
Relays
Resource allocation
Symbols
Tuning
ISSN:0018-9545, 1939-9359
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Popis
Shrnutí:In this correspondence, we propose a closed-form resource allocation called partition-based multiple access (MA), which simultaneously utilizes both a reconfigurable intelligent surface (RIS) and non-orthogonal multiple access (NOMA) to reduce processing overhead and transmit power. The RIS can tune the mmWave signal and reduce the downlink transmit power, and NOMA achieves a relatively higher spectral efficiency than other MA methods. The integration of the RIS and NOMA, thus, can be a powerful solution. Previous studies have yet to obtain a closed-form solution for both the beam tuning settings and the decoding order in low complexity in the conventional RIS-NOMA. The proposed partition-based MA method, however, divides and arranges the array elements of the RIS to generate a fine beam for NOMA communications. We compare the transmit power reduction of the proposed method with the transmit power reduction of time-sharing and decode-and-forward relay. To confirm the feasibility of the integration, we also derive the criteria for MA mode selection.
Bibliografia:ObjectType-Article-1
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content type line 14
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2022.3176017