基于 IRS 辅助一位控制的 FSO-RF 混合通信系统的性能评估

IF 1.8 4区 计算机科学 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS
Amina Girdher, Ankur Bansal, Manav R. Bhatnagar, Ankit Dubey
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引用次数: 0

摘要

本文研究了新型单比特控制智能反射面(IRS)辅助自由空间光(FSO)-射频(RF)混合通信系统的性能,其中在射频跳频上利用 IRS 增强端到端系统性能。假定 FSO 链路受到路径损耗、非零孔径指向误差和大气湍流的影响,这些影响由广义马拉加((mathcal {M}\))分布建模,而射频链路中的多径衰落由中上-m 分布建模。特别是,我们为光外差检测(OHD)和直接检测强度调制(IMDD)技术推导出了统一的中断概率(OP)、误码率(BER)和遍历容量(EC)闭式表达式。通过获得渐近 OP 和渐近误码率表达式,我们还推导出了所考虑的 IRS 辅助系统的可实现分集阶数。此外,我们还推导出了所考虑系统的渐近 EC。数值结果表明,拟议的 IRS 辅助系统明显优于传统的无 IRS 混合 FSO-RF 系统。此外,我们还研究了反射元件数量、实际反射幅度和 IRS 控制机制对系统性能的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Performance evaluation of IRS-assisted one-bit control-based mixed FSO-RF communication system

Performance evaluation of IRS-assisted one-bit control-based mixed FSO-RF communication system

In this paper, we investigate the performance of the novel one-bit control intelligent reflecting surface (IRS)-assisted mixed free-space optical (FSO)-radio frequency (RF) communication system, where an IRS is utilized over the RF hop to empower the end-to-end system performance. The FSO link is assumed to be affected by path loss, nonzero boresight pointing error, and atmospheric turbulence, which is modeled by generalized Malaga (\(\mathcal {M}\))-distribution, whereas the multipath fading in RF link is modeled by Nakagami-m distribution. In particular, unified closed-form expressions for the outage probability (OP), bit-error-rate (BER), and ergodic capacity (EC) are derived for optical heterodyne detection (OHD) and intensity modulation with direct detection (IMDD) techniques. We also derive the achievable diversity order of the considered IRS-assisted system by obtaining the asymptotic OP and asymptotic BER expressions. In addition, we derive the asymptotic EC of the considered system. The numerical results show that the proposed IRS-assisted system significantly outperforms the conventional mixed FSO-RF system without IRS. Moreover, the impact of the number of reflecting elements, practical reflection amplitude, and controlling mechanism at the IRS is studied on the system performances.

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来源期刊
Photonic Network Communications
Photonic Network Communications 工程技术-电信学
CiteScore
4.10
自引率
5.90%
发文量
33
审稿时长
12 months
期刊介绍: This journal publishes papers involving optical communication networks. Coverage includes network and system technologies; network and system architectures; network access and control; network design, planning, and operation; interworking; and application design for an optical infrastructure This journal publishes high-quality, peer-reviewed papers presenting research results, major achievements, and trends involving all aspects of optical network communications. Among the topics explored are transport, access, and customer premises networks; local, regional, and global networks; transoceanic and undersea networks; optical transparent networks; WDM, HWDM, and OTDM networks and more.
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