星间光链路(OISL)信道建模与速率分析

IF 7.1 2区 计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Bodong Shang;Shuo Zhang;Zi Jing Wong
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引用次数: 0

摘要

光星间链路(OISLs)提高了空间中卫星之间的连通性。与传统的射频传输相比,它们具有高通量数据传输和更小的尺寸、重量和功率要求等优点。然而,卫星间激光远距离传输的信道模型和通信性能仍有待深入研究。在本文中,我们首先建立了非地面网络(NTN)中OISL通信的信道模型,该模型考虑了由卫星抖动和跟踪噪声引起的指向误差。我们推导了由这些指向误差引起的信道状态分布,并计算了它们的平均值。此外,我们确定了NTN中OISL通信的平均可实现数据速率,并设计了一个协作OISL系统,突出了集中光束能量和平衡失调之间的权衡。我们计算了在遵守延迟限制的情况下,协作oisl中实现目标数据传输规模所需的最小卫星数量。这涉及到探索每个链路增加的数据速率和所有链路的累积延迟之间的平衡。最后,仿真结果验证了所提出分析模型的有效性,并提供了合作oisl所需的最佳卫星数量和最佳激光频率的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Channel Modeling and Rate Analysis of Optical Inter-Satellite Link (OISL)
Optical inter-satellite links (OISLs) improve connectivity between satellites in space. They offer advantages such as high-throughput data transfer and reduced size, weight, and power requirements compared to traditional radio frequency transmission. However, the channel model and communication performance for long-distance inter-satellite laser transmission still require in-depth study. In this paper, we first develop a channel model for OISL communication within non-terrestrial networks (NTN) by accounting for pointing errors caused by satellite jitter and tracking noise. We derive the distributions of the channel state arising from these pointing errors and calculate their average value. Additionally, we determine the average achievable data rate for OISL communication in NTN and design a cooperative OISL system, highlighting a trade-off between concentrating beam energy and balancing misalignment. We calculate the minimum number of satellites required in cooperative OISLs to achieve a targeted data transmission size while adhering to latency constraints. This involves exploring the balance between the increased data rate of each link and the cumulative latency across all links. Finally, simulation results validate the effectiveness of the proposed analytical model and provide insights into the optimal number of satellites needed for cooperative OISLs and the optimal laser frequency to use.
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来源期刊
CiteScore
6.00
自引率
8.80%
发文量
1245
审稿时长
6.3 months
期刊介绍: The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.
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