论文标题
下一代卫星网络的自由空间光学器件
Free Space Optics for Next-Generation Satellite Networks
论文作者
论文摘要
自由空间光学器件（FSO）是指室外环境中的光学无线通信。本文的目的是分析FSO在创建下一代卫星网络中扮演的角色。首先，将读者引入基本FSO系统的FSO链接和功能的类型。接下来，提供了用于卫星间链接（ISL）的FSO和射频（RF）技术的比较，包括在低地球轨道卫星之间使用FSO和RF链路之间的比较。之后，考虑了FSO或激光ISL的类型，并在建立激光ISL，激光ISL的特性以及激光ISL的终端功能方面面临的挑战。然后，突出显示了卫星星座的参数，并探索了SpaceX即将到来的Mega构成Starlink的不同方面。此外，检查通过使用激光ISL创建的光学无线卫星网络。最后，研究了由2020年代中期至后期设想的下一代光学无线卫星网络的用例。
Free space optics (FSO) refers to optical wireless communications in outdoor environments. The aim of this paper is to analyze the role that FSO is envisaged to play in the creation of next-generation satellite networks. To begin with, the reader is introduced to the types of FSO links and functionalities of a basic FSO system. Next, a comparison of FSO and radio frequency (RF) technologies for inter-satellite links (ISLs) is provided, including a comparison between FSO and RF links when employed between low Earth orbit satellites. After that, the types of FSO or laser ISLs are considered, and the challenges in establishing laser ISLs, the properties of laser ISLs, and the capabilities of terminals for laser ISLs are discussed. Then, the parameters of a satellite constellation are highlighted, and different aspects of SpaceX's upcoming mega-constellation Starlink are explored. In addition, the optical wireless satellite network that is created by utilizing laser ISLs is examined. Finally, a use case is investigated for next-generation optical wireless satellite networks that are envisioned by the mid to late 2020s.
