THz-Enabled UAV Communications Under Pointing Errors: Tractable Statistical Channel Modeling and Security Analysis

IF 5.3 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Mohammad Javad Saber;Mazen Hasna;Osamah S. Badarneh
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引用次数: 0

Abstract

Unmanned aerial vehicles (UAVs) are increasingly being utilized as mobile base stations for rapidly establishing temporary wireless coverage in emergency situations and remote locations. Their high mobility and flexibility make UAVs ideal for quickly deployed communication systems, but these features also introduce unique challenges, particularly in maintaining stable and reliable communication links. The highly directional nature of terahertz (THz) antennas introduces challenges in UAV communication systems. Combined with the mobility of UAVs, this can cause significant issues, such as beam misalignment and signal degradation. Thus, developing accurate radio channel models that address these challenges is critical to ensure reliable communication. In this study, we present an analytical framework focused on evaluating the security performance of highly directional THz-enabled UAV communication links. The challenges analyzed include misalignment of directional beams, path loss, small-scale fading, and UAV-induced vibrations. The small-scale fading is modeled using the $\alpha$$\mu$ distribution, which accurately represents various fading environments. Using the Meijer G-function, we derive closed-form expressions for key statistical functions, including the probability density function (PDF) and cumulative distribution function (CDF) of the channel gain. Furthermore, a detailed physical-layer security analysis is provided, focusing on metrics such as average secrecy capacity, secrecy outage probability, and the probability of strictly positive secrecy capacity, particularly in the presence of UAV eavesdroppers. Numerical results validate the analytical expressions under different operational conditions, such as beam misalignment and fading, providing valuable insights into the security and performance of THz-enabled UAV communication systems. These results provide important guidelines for optimizing future wireless networks using UAVs and THz frequencies to ensure secure and reliable data transmission in dynamic environments.
指向错误下的太赫兹无人机通信:可处理的统计信道建模和安全性分析
无人驾驶飞行器(uav)越来越多地被用作移动基站,在紧急情况和偏远地区迅速建立临时无线覆盖。它们的高机动性和灵活性使无人机成为快速部署通信系统的理想选择,但这些特点也带来了独特的挑战,特别是在保持稳定和可靠的通信链路方面。太赫兹(THz)天线的高度定向特性给无人机通信系统带来了挑战。结合无人机的机动性,这可能会导致重大问题,如波束错位和信号退化。因此,开发应对这些挑战的准确无线电信道模型对于确保可靠的通信至关重要。在本研究中,我们提出了一个分析框架,重点评估高度定向太赫兹无人机通信链路的安全性能。所分析的挑战包括定向波束的不对准、路径损耗、小规模衰落和无人机引起的振动。采用$\alpha$ - $\mu$分布对小尺度衰落进行建模,准确地反映了各种衰落环境。利用Meijer g函数,导出了信道增益的概率密度函数(PDF)和累积分布函数(CDF)等关键统计函数的封闭表达式。此外,还提供了详细的物理层安全分析,重点关注诸如平均保密能力、保密中断概率和严格保密能力的概率等指标,特别是在无人机窃听者存在的情况下。数值结果验证了不同操作条件下的解析表达式,例如波束错位和衰落,为太赫兹无人机通信系统的安全性和性能提供了有价值的见解。这些结果为优化未来使用无人机和太赫兹频率的无线网络提供了重要指导,以确保在动态环境中安全可靠地传输数据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
9.60
自引率
0.00%
发文量
25
审稿时长
10 weeks
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