Reconfigurable Intelligent Surface Enhanced NOMA Assisted Backscatter Communication System

被引：52

作者：

Zuo, Jiakuo ^{[1
]}

Liu, Yuanwei ^{[2
]}

Yang, Liang ^{[3
]}

Song, Lingyang ^{[4
]}

Liang, Ying-Chang ^{[5
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Sch Internet Things, Nanjing 210003, Peoples R China

[2] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London E1 4NS, England

[3] Hunan Univ, Coll Comp Sci & Elect Engn, Changsha 410082, Hunan, Peoples R China

[4] Peking Univ, Dept Elect, Beijing 100080, Peoples R China

[5] Univ Elect Sci & Technol China UESTC, Ctr Intelligent Networking & Commun CINC, Chengdu 611731, Peoples R China

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2021年 / 70卷 / 07期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Optimization; Backscatter; Decoding; NOMA; Resource management; Quality of service; Internet of Things; Backscatter communication; power allocation; reconfigurable intelligent surface; non-orthogonal multiple access; NONORTHOGONAL MULTIPLE-ACCESS; POWER ALLOCATION; NETWORKS;

D O I：

10.1109/TVT.2021.3087582

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

To enhance the backscatter-links with double fading effect in non-orthogonal multiple access assisted backscatter communication (NOMABC), a new reconfigurable intelligent surface (RIS) enhanced NOMABC (RIS-NOMABC) system is proposed. A joint optimization problem over power reflection coefficients at the backscatter devices (BDs) and phase shifts at the RIS is formulated. To solve this non-convex problem, a low complexity algorithm is proposed by invoking the alternative optimization, successive convex approximation and manifold optimization algorithms. Numerical results corroborate that the proposed RIS-NOMABC system outperforms the conventional NOMABC system without RIS, and demonstrate the feasibility and effectiveness of the proposed algorithm.

引用

页码：7261 / 7266

页数：6

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