利用蜂群卫星网络实现宽带分布式波束成形
Harnessing the Power of Swarm Satellite Networks with Wideband Distributed Beamforming
AI总结：
针对手持终端宽带通信需求，本文提出卫星蜂群宽带分布式波束成形建模方法，并结合节点几何统计特性，通过仿真验证其在功率增益和抗窃听安全性上的优势。
摘要：
空间通信行业面临一项挑战：需要开发一种能够为配备微型天线（如手持设备）的用户终端提供宽带服务的技术。一种可能的解决方案是在单一航天器上部署大规模天线，但这种方式并不具备成本效益。与近期“NewSpace”活动中朝向小型化、大规模生产以及大幅降低航天器发射成本的方向一致，另一种替代方案是由多颗卫星进行分布式波束成形。在此背景下，我们提出了一种面向宽带信号的分布式波束成形建模技术。同时，我们还考虑了蜂群节点相对几何关系的统计行为。本文通过计算机仿真对所提技术进行了评估，在功率方面的波束成形增益以及通信在非预期指向角下对抗潜在窃听者的安全性方面给出了有价值的结果。该方法为在若干未来通信应用中进一步探索卫星蜂群宽带分布式波束成形铺平了道路。
英文摘要：
The space communications industry is challenged to develop a technology that can deliver broadband services to user terminals equipped with miniature antennas, such as handheld devices. One potential solution to establish links with ground users is the deployment of massive antennas in one single spacecraft. However, this is not cost-effective. Aligning with recent \emph{NewSpace} activities directed toward miniaturization, mass production, and a significant reduction in spacecraft launch costs, an alternative could be distributed beamforming from multiple satellites. In this context, we propose a distributed beamforming modeling technique for wideband signals. We also consider the statistical behavior of the relative geometry of the swarm nodes. The paper assesses the proposed technique via computer simulations, providing interesting results on the beamforming gains in terms of power and the security of the communication against potential eavesdroppers at non-intended pointing angles. This approach paves the way for further exploration of wideband distributed beamforming from satellite swarms in several future communication applications.
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