基于H-ARQ协议的混合双跳IRS辅助FSO-RF通信系统
Mixed Dual-Hop IRS-Assisted FSO-RF Communication System with H-ARQ Protocols
摘要：
智能反射面（IRS）是第五代（5G）及以后无线通信系统的新兴关键技术，可提供更强大、更可靠的通信链路。在本文中，我们提出了一个混合的双跳自由空间光（FSO）射频（RF）通信系统，通过解码转发（DF）中继采用混合自动重传请求（HARQ）协议的两个跳为最终用户提供服务。新的封闭形式的表达的概率密度函数（PDF）和累积密度函数（CDF）的等效端到端的信噪比（SNR）计算所考虑的系统。利用得到的统计函数，我们推导出中断概率（OP）和数据包出错率（PER）的建议系统考虑广义检测技术的源到中继（S-R）链路与H-ARQ协议和IRS具有相位误差。我们获得有用的见解系统的性能，通过渐近分析，这有助于计算的多样性增益。推导的分析结果进行了验证，使用Monte Carlo模拟。
英文摘要：
Intelligent reflecting surface (IRS) is an emerging key technology for the fifth-generation (5G) and beyond wireless communication systems to provide more robust and reliable communication links. In this paper, we propose a mixed dual-hop free-space optical (FSO)-radio frequency (RF) communication system that serves the end user via a decode-and-forward (DF) relay employing hybrid automatic repeat request (HARQ) protocols on both hops. Novel closed-form expressions of the probability density function (PDF) and cumulative density function (CDF) of the equivalent end-to-end signal-to-noise ratio (SNR) are computed for the considered system. Utilizing the obtained statistics functions, we derive the outage probability (OP) and packet error rate (PER) of the proposed system by considering generalized detection techniques on the source-to-relay (S-R) link with H-ARQ protocol and IRS having phase error. We obtain useful insights into the system performance through the asymptotic analysis which aids to compute the diversity gain. The derived analytical results are validated using Monte Carlo simulation.
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