Analysis of Outage Probability and Average Bit Error Rate of Parallel-UAV-Based Free-Space Optical Communications.

IF 2.1 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Entropy Pub Date : 2025-06-18 DOI:10.3390/e27060650
Sheng-Hong Lin, Jin-Yuan Wang, Xinyi Hua
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引用次数: 0

Abstract

Recently, free-space optical (FSO) communication systems utilizing unmanned aerial vehicle (UAV) relays have garnered significant attention. Integrating UAV relays into FSO communication and employing cooperative diversity techniques not only fulfill the need for long-distance transmission but also enable flexible adjustments of relay positions based on the actual environment. This paper investigates the performance of a parallel-UAV-relay-based FSO communication system. In the considered system, the channel fadings include atmospheric loss, atmospheric turbulence, pointing errors, and angle-of-arrival fluctuation. Using the established channel model, we derive a tractable expression for the probability density function of the total channel gain. Then, we derive closed-form expressions of the system outage probability (OP) and average bit error rate (ABER). Moreover, we also derive the asymptotic OP and ABER for a high-optical-intensity regime. Our numerical results validate the accuracy of the derived theoretical expressions. Additionally, the effects of the number of relay nodes, the field of view, the direction deviation, the signal-to-noise ratio threshold, the atmospheric turbulence intensity, the transmit power, and the transmission distance on the system's performance are also discussed.

基于并行无人机的自由空间光通信中断概率和平均误码率分析。
最近,利用无人机(UAV)中继的自由空间光学(FSO)通信系统引起了极大的关注。将无人机中继器集成到FSO通信中,采用协同分集技术,不仅可以满足远距离传输的需要,而且可以根据实际环境灵活调整中继器位置。本文研究了一种基于并联无人机中继的FSO通信系统的性能。在考虑的系统中,信道衰落包括大气损失、大气湍流、指向误差和到达角波动。利用所建立的信道模型,导出了信道总增益的概率密度函数的易于处理的表达式。然后,导出了系统中断概率(OP)和平均误码率(ABER)的封闭表达式。此外,我们还推导了高光强状态下的渐近OP和ABER。数值结果验证了推导出的理论表达式的准确性。此外,还讨论了中继节点数、视场、方向偏差、信噪比阈值、大气湍流强度、发射功率和传输距离等因素对系统性能的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Entropy
Entropy PHYSICS, MULTIDISCIPLINARY-
CiteScore
4.90
自引率
11.10%
发文量
1580
审稿时长
21.05 days
期刊介绍: Entropy (ISSN 1099-4300), an international and interdisciplinary journal of entropy and information studies, publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish as much as possible their theoretical and experimental details. There is no restriction on the length of the papers. If there are computation and the experiment, the details must be provided so that the results can be reproduced.
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