One of the important questions when discussing next-generation near-Earth mmWave and terahertz (THz) band satellite communications as an integral part of the 5G-Advanced and 6G landscape is the potential interference-related issues when deploying such systems. While the space-to-ground and ground-to-space interference has been explored in multiple works already, the interference at mmWave and THz cross-links, the links between the satellites themselves, have not been extensively studied yet. However, severe cross-link interference may both challenge the reliability of the data exchange within the constellation, as well as compromise the efficient co-existence of multiple satellite constellations (i.e., by different providers) covering the same or neighboring areas. In this paper, both relevant mathematical models and extensive simulation studies are presented for cross-link mmWave and THz satellite communications. Our results indicate that the cross-link interference in the considered setups is a non-negligible factor that must be further explored and accounted for in the design and deployment of next-general mmWave and THz satellite communication systems.

翻译：在讨论作为5G-Advanced和6G格局重要组成部分的下一代近地毫米波与太赫兹频段卫星通信时，一个关键问题在于部署此类系统的潜在干扰问题。尽管已有大量研究探讨了空对地及地对空干扰，但毫米波与太赫兹波段星间链路（卫星之间的链路）的干扰尚未得到充分研究。然而，严重的星间链路干扰不仅可能影响星座内数据交换的可靠性，还会破坏覆盖相同或邻近区域的多卫星星座（如不同运营商部署的星座）之间的高效共存。本文针对星间链路的毫米波与太赫兹卫星通信，提出了相应的数学模型并开展了广泛的仿真研究。结果表明，在所考虑的配置中，星间链路干扰是一个不可忽视的因素，必须在下一代毫米波与太赫兹卫星通信系统的设计与部署中予以进一步探讨和充分考虑。