Evaluation of Full-Duplex SWIPT Cooperative NOMA-Based IoT Relay Networks over Nakagami-m Fading Channels

Sensors

Phu X. Nguyen¹  Yong-Hwa Kim²  Sang Quang Nguyen³  Tien-Tung Nguyen⁴ 

[1] Department of Computing Fundamentals, FPT University, Ho Chi Minh City 700000, Vietnam;Department of Data Science, Korea National University of Transportation (KNUT), Uiwang-si 16106, Gyeonggi-do, Korea;Department of Science and International Cooperation, Ho Chi Minh City University of Transport, Ho Chi Minh City 700000, Vietnam;Faculty of Electronics Technology, Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh City 700000, Vietnam;

关键词: NOMA;    maximum ratio transmission;    AF;    outage probability;    ergodic capacity;   

DOI  :  10.3390/s22051974

来源: DOAJ

【 摘 要 】

In this paper, we investigate the performance of non-orthogonal multiple access (NOMA)-based full-duplex Internet-of-Things (IoT) relay systems with simultaneous wireless information and power transfer (SWIPT) over Nakagami-m fading channels to improve the performance of a cell-edge user under perfect and imperfect successive interference cancellation (SIC). Two scenarios, i.e., direct and non-direct links, between the source node and cell-edge user are examined. The exact closed-form analytical and approximate expressions for the outage probability, system throughput, energy efficiency, and ergodic capacities are derived and validated via Monte Carlo simulations to characterize the proposed system performance. To further improve the system performance, we also provide a low-complexity algorithm to maximize the system throughput over-optimizing the time-switching factor. The results show that our proposed NOMA system can achieve superior performance compared to its orthogonal multiple access (OMA) counterpart under perfect SIC and with a low-to-medium signal-to-noise ratio under imperfect SIC, according to the level of residual self-interference and the quality of links.

【 授权许可】

Unknown