Exploiting Multi-Hop RIS-Assisted UAV Communications: Performance Analysis
Exploiting Multi-Hop RIS-Assisted UAV Communications: Performance Analysis
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DOI：
10.1109/lcomm.2023.3339969
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发表时间：
2024-01
期刊：
影响因子：
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通讯作者：
Mohammad Abualhayja’a;A. Centeno;Lina S. Mohjazi;M. M. Butt-M.;Philippe Sehier;M. Imran
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文献类型：
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作者：
Mohammad Abualhayja’a;A. Centeno;Lina S. Mohjazi;M. M. Butt-M.;Philippe Sehier;M. Imran
未来的无线通信网络预计将广泛利用无人机（UAV）和可重构智能表面（RIS）来提高性能，扩大覆盖范围，并提高能源效率。在这封信中，多跳RIS辅助无人机通信系统的系统性能的基本限制进行了分析和表征。我们推导出准确的封闭形式的近似的统计分布的RIS辅助信道，然后利用推导出的信号噪声比（SNR），中断概率，和误码率（BER）的解析表达式。此外，我们推导出中断概率表达式在高信噪比制度。我们的分析表明，战略性地放置RIS与足够数量的元素，可以有效地提高无人机通信在不同的衰落场景的性能。RIS动态地适应变化的频道和用户位置，当无人机导航不同的地理区域时，由于无人机的高度和动态移动性，理想的视线（LoS）条件可能无法始终达到时，增强性能。
Future wireless communication networks are expected to extensively utilise unmanned aerial vehicles (UAVs) and reconfigurable intelligent surfaces (RISs) to improve performance, extend coverage, and enhance energy efficiency. In this letter, the fundamental limits of the system performance of a multi-hop RIS-assisted UAV communication system are analysed and characterised. We derive accurate closed-form approximations for the statistical distributions of the RIS-assisted channels which are then exploited to derive an analytical expression for the signal-to-noise ratio (SNR), outage probability, and bit error rate (BER). Moreover, we derive outage probability expressions in the high SNR regime. Our analysis demonstrates that strategically placing RIS with an adequate number of elements can effectively enhance the performance of UAV communications in different fading scenarios. RIS dynamically adapts to changing channels and user positions, enhancing performance as the UAV navigates diverse geographical areas, when ideal Line of Sight (LoS) conditions may not be consistently attainable due to the UAV’s altitude and dynamic mobility.