Hung Tran Cong, Nguyen Tan N, Nhan N H K, Le Anh-Tu, Son Pham Ngoc, Pham Thu-Ha Thi, Voznak Miroslav
Dean of School of Computer Science & Engineering, The SaiGon Internaltional University, Ho Chi Minh City, Vietnam.
Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, Ostrava, Czechia.
PLoS One. 2024 Dec 20;19(12):e0315123. doi: 10.1371/journal.pone.0315123. eCollection 2024.
This paper investigates the performance of hybrid radio frequency/free space optical (RF/FSO) systems combined with non-orthogonal multiple access communications technology. We examine a scenario where the source and destination are separated by a large distance, with no direct link between them. The relay, denoted R, operates using the decode-and-forward (DF) protocol. Under the DF relaying scheme, the relay employs successive interference cancellation (SIC). In this setup, the FSO link from the source to the relay follows a Gamma-Gamma distribution, while the RF link from the relay to multiple users follow a Nakagami-m distribution. Based on this system model, we analyze the outage probability (OP). Our findings indicate a direct relationship between SIC and OP performance: the higher the SIC capability, the more effective the system. In addition, the system's performance is dependent on the parameters of the FSO channel. Finally, Monte Carlo simulations are presented to further validate our framework and findings.
本文研究了结合非正交多址通信技术的混合射频/自由空间光（RF/FSO）系统的性能。我们考察了一种源端和目的端相距很远且它们之间没有直接链路的场景。中继节点记为R，采用解码转发（DF）协议工作。在DF中继方案下，中继采用连续干扰消除（SIC）技术。在此设置中，从源端到中继的FSO链路服从伽马-伽马分布，而从中继到多个用户的RF链路服从 Nakagami - m分布。基于此系统模型，我们分析了中断概率（OP）。我们的研究结果表明SIC与OP性能之间存在直接关系：SIC能力越高，系统越有效。此外，系统性能还取决于FSO信道的参数。最后，给出了蒙特卡罗仿真结果以进一步验证我们的框架和研究结果。
