RIS辅助的混合RF/THz系统性能分析

doi:10.11959/j.issn.1000-436x.2022005

通信学报 ›› 2022, Vol. 43 ›› Issue (1): 49-58.doi: 10.11959/j.issn.1000-436x.2022005

• 专题：太赫兹通信关键技术 • 上一篇下一篇

RIS辅助的混合RF/THz系统性能分析

黎赛¹, 杨亮¹, 崔琪楣², 于思源³

¹ 湖南大学信息科学与工程学院，湖南长沙 410082
² 北京邮电大学信息与通信工程学院，北京 100876
³ 哈尔滨工业大学航天学院，黑龙江哈尔滨 150001

修回日期:2021-12-15 出版日期:2022-01-25 发布日期:2022-01-01
作者简介:黎赛（1996- ），女，湖南长沙人，湖南大学博士生，主要研究方向为光无线通信、太赫兹通信性能分析等
杨亮（1977- ），男，湖南邵阳人，博士，湖南大学教授、博士生导师，主要研究方向为无线通信、光无线通信、无人机通信、物理层安全等
崔琪楣（1979- ），女，河南驻马店人，博士，北京邮电大学教授、博士生导师，主要研究方向为宽带移动通信网络的新理论及技术、无线大数据基础理论研究等
于思源（1974- ），男，黑龙江双鸭山人，博士，哈尔滨工业大学教授、博士生导师，主要研究方向为卫星光通信、空间光通信等
基金资助:
湖南省重点研发计划基金资助项目(2022GK2051);湖南省高新技术产业科技创新引领计划基金资助项目(2022GK4004);国家自然科学基金资助项目(91838302)

Performance analysis of RIS-assisted mixed RF/THz system

Sai LI¹, Liang YANG¹, Qimei CUI², Siyuan YU³

¹ College of Computer Science and Electronic Engineering, Hunan University, Changsha 410082, China
² School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
³ School of Astronautic, Harbin Institute of Technology, Harbin 150001, China

Revised:2021-12-15 Online:2022-01-25 Published:2022-01-01
Supported by:
The Key Research and Development Program of Hunan Province(2022GK2051);The High-Tech Industry Science and Technology Innovation Leading Program Project of Hunan Province(2022GK4004);The National Natural Science Foundation of China(91838302)

摘要/Abstract

摘要：

针对太赫兹（THz）链路传输距离短的问题，研究了智能反射表面（RIS）辅助的混合双跳射频（RF）/THz系统的性能。RIS用于增强信号强度，从而提升系统性能。采用固定增益放大转发协议，推导了混合RF/THz 链路端到端信噪比的累积分布函数和概率密度函数表达式。利用这些统计特性，进一步推导了该混合中继系统的中断概率、平均误码率和平均信道容量的分析表达式。此外，还对中断概率和平均误码率进行了渐近分析，获得了混合RF/THz系统的分集度。仿真结果表明，RIS可以有效提高混合RF/THz系统的性能。此外，系统的性能还与信道衰落参数、指向误差和距离有关。

关键词: 可重构智能表面, 太赫兹通信, 混合双跳系统, 性能分析

Abstract:

To solve the problem of the short transmission distance of terahertz (THz) links, the performance of the reconfigurable intelligent surface (RIS)-assisted mixed dual-hop radio frequency (RF)/THz system was studied.An RIS was used to enhance signal strength, thereby improving the system performance.Using the fixed-gain amplify-and-forward protocol, the cumulative distribution function and probability density function of the end-to-end signal-to-noise ratio of the RF/THz link were derived.Capitalizing on the statistical characteristics, the analytical expressions of outage probability, average bit error rate, and average channel capacity of the mixed relaying system were further derived.In addition, the asymptotic analyses of the outage probability and the average bit error rate were carried out to obtain the diversity order of the mixed RF/THz system.Simulation results show that the RIS can effectively improve the performance of the mixed RF/THz system.Furthermore, the system performance is related to the channel fading, pointing errors, and propagation distance.

Key words: reconfigurable intelligent surface, terahertz communication, mixed dual-hop system, performance analysis

中图分类号:

TN92

黎赛, 杨亮, 崔琪楣, 于思源. RIS辅助的混合RF/THz系统性能分析[J]. 通信学报, 2022, 43(1): 49-58.

Sai LI, Liang YANG, Qimei CUI, Siyuan YU. Performance analysis of RIS-assisted mixed RF/THz system[J]. Journal on Communications, 2022, 43(1): 49-58.

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RIS辅助的混合RF/THz系统性能分析

Performance analysis of RIS-assisted mixed RF/THz system

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