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可重构智能表面辅助的混合RF-FSO传输系统性能分析
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Performance Analysis of RIS-assisted Hybrid RF-FSO Transmission Systems
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    自由空间光(FSO)通信具有高速率、低成本和强抗干扰能力,但是大气湍流引起的衰落会造成FSO通信系统的性能恶化.传统的解决方案是使用RF链路作为并行的通信链路来提升系统性能.可重构智能表面(RIS)具有低损耗、部署简易且无须复杂的编码和解码等优点,能够进一步提高RF链路的接收信噪比.本文提出一种RIS辅助的混合RF-FSO传输系统,以此来改善通信服务质量.基于此混合模型,导出系统中断概率、平均误码率和信道容量的表达式,同时给出蒙特卡罗仿真来验证分析结果的准确性.结果表明所提出系统的性能相比于传统的混合RF-FSO系统有显著的提升.

    Abstract:

    Free Space Optical(FSO) communications offer high speed, low cost, and strong anti-interference ability. However, the atmospheric turbulence-induced fading causes deterioration in the performance of FSO communication systems. The conventional solution is to use Radio Frequency(RF) links as parallel communication links to improve the system’s performance. On the other hand,Reconfigurable Intelligent Surfaces(RIS) can be employed to further improve the received signal-to-noise ratio of the RF link due to its advantages of low loss, easy deployment, and no need for complex coding and decoding. In this paper, a RIS-assisted hybrid RF-FSO transmission system is proposed to improve the communication quality of service. Based on this hybrid model,the exact expressions for the outage probability, average Bit Error Ratio(BER),and channel capacity are derived, and Monte Carlo simulations are presented to verify the accuracy of the analytical results. The results show that the performance of the proposed system is significantly improved compared with the conventional hybrid RF-FSO system.

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杨亮 ?,袁勇杰 ,陈生海 ,马荣昌 .可重构智能表面辅助的混合RF-FSO传输系统性能分析[J].湖南大学学报:自然科学版,2022,49(10):1~7

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  • 在线发布日期: 2022-11-07
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