A New Rate Splitting Strategy for Uplink CR-NOMA Systems

Hongwu Liu; Zhiquan Bai; Hongjiang Lei; Gaofeng Pan; Kyeong Jin Kim; Theodoros A. Tsiftsis

doi:10.1109/TVT.2022.3166218

A New Rate Splitting Strategy for Uplink CR-NOMA Systems

Hongwu Liu, Zhiquan Bai, Hongjiang Lei, Gaofeng Pan, Kyeong Jin Kim, Theodoros A. Tsiftsis

Research output: Journal Publication › Article › peer-review

50 Citations (Scopus)

Abstract

In uplink non-orthogonal multiple access (NOMA) channels, the existing cooperative successive interference cancellation (SIC) and power control (PC) schemes lack the capability of achieving the full capacity region, which restricts the outage performance of uplink NOMA users. For the uplink cognitive radio inspired NOMA system, we propose a new rate splitting (RS) strategy to maximize the achievable rate of the secondary user without deteriorating the primary user's outage performance. Based on the interference threshold and its own channel gain, the secondary user adaptively conducts RS, transmit power allocation and SIC, which utilizes the transmit power efficiently. The closed-form expression for the outage probability is derived for the secondary user. Numerical results show that the proposed RS scheme achieves the best outage performance for the secondary user among the existing cooperative SIC and PC schemes.

Original language	English
Pages (from-to)	7947-7951
Number of pages	5
Journal	IEEE Transactions on Vehicular Technology
Volume	71
Issue number	7
DOIs	https://doi.org/10.1109/TVT.2022.3166218
Publication status	Published - 1 Jul 2022
Externally published	Yes

Keywords

Cognitive radio (CR)
Non-orthogonal multiple access (NOMA)
Outage probability
Rate splitting (RS)

ASJC Scopus subject areas

Automotive Engineering
Aerospace Engineering
Computer Networks and Communications
Electrical and Electronic Engineering

Access to Document

10.1109/TVT.2022.3166218

Cite this

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title = "A New Rate Splitting Strategy for Uplink CR-NOMA Systems",

abstract = "In uplink non-orthogonal multiple access (NOMA) channels, the existing cooperative successive interference cancellation (SIC) and power control (PC) schemes lack the capability of achieving the full capacity region, which restricts the outage performance of uplink NOMA users. For the uplink cognitive radio inspired NOMA system, we propose a new rate splitting (RS) strategy to maximize the achievable rate of the secondary user without deteriorating the primary user's outage performance. Based on the interference threshold and its own channel gain, the secondary user adaptively conducts RS, transmit power allocation and SIC, which utilizes the transmit power efficiently. The closed-form expression for the outage probability is derived for the secondary user. Numerical results show that the proposed RS scheme achieves the best outage performance for the secondary user among the existing cooperative SIC and PC schemes.",

keywords = "Cognitive radio (CR), Non-orthogonal multiple access (NOMA), Outage probability, Rate splitting (RS)",

author = "Hongwu Liu and Zhiquan Bai and Hongjiang Lei and Gaofeng Pan and Kim, \{Kyeong Jin\} and Tsiftsis, \{Theodoros A.\}",

note = "Publisher Copyright: {\textcopyright} 1967-2012 IEEE.",

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doi = "10.1109/TVT.2022.3166218",

language = "English",

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T1 - A New Rate Splitting Strategy for Uplink CR-NOMA Systems

AU - Liu, Hongwu

AU - Bai, Zhiquan

AU - Lei, Hongjiang

AU - Pan, Gaofeng

AU - Kim, Kyeong Jin

AU - Tsiftsis, Theodoros A.

PY - 2022/7/1

Y1 - 2022/7/1

N2 - In uplink non-orthogonal multiple access (NOMA) channels, the existing cooperative successive interference cancellation (SIC) and power control (PC) schemes lack the capability of achieving the full capacity region, which restricts the outage performance of uplink NOMA users. For the uplink cognitive radio inspired NOMA system, we propose a new rate splitting (RS) strategy to maximize the achievable rate of the secondary user without deteriorating the primary user's outage performance. Based on the interference threshold and its own channel gain, the secondary user adaptively conducts RS, transmit power allocation and SIC, which utilizes the transmit power efficiently. The closed-form expression for the outage probability is derived for the secondary user. Numerical results show that the proposed RS scheme achieves the best outage performance for the secondary user among the existing cooperative SIC and PC schemes.

AB - In uplink non-orthogonal multiple access (NOMA) channels, the existing cooperative successive interference cancellation (SIC) and power control (PC) schemes lack the capability of achieving the full capacity region, which restricts the outage performance of uplink NOMA users. For the uplink cognitive radio inspired NOMA system, we propose a new rate splitting (RS) strategy to maximize the achievable rate of the secondary user without deteriorating the primary user's outage performance. Based on the interference threshold and its own channel gain, the secondary user adaptively conducts RS, transmit power allocation and SIC, which utilizes the transmit power efficiently. The closed-form expression for the outage probability is derived for the secondary user. Numerical results show that the proposed RS scheme achieves the best outage performance for the secondary user among the existing cooperative SIC and PC schemes.

KW - Cognitive radio (CR)

KW - Non-orthogonal multiple access (NOMA)

KW - Outage probability

KW - Rate splitting (RS)

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DO - 10.1109/TVT.2022.3166218

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JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

IS - 7

ER -

A New Rate Splitting Strategy for Uplink CR-NOMA Systems

Abstract

Keywords

ASJC Scopus subject areas

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