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可能产生的干扰相关问题。尽管空间-地面与地面-空间的干扰已在多项研究中得到探讨，但毫米波与太赫兹交叉链路（即卫星之间的链路）中的干扰尚未得到广泛研究。然而，严重的交叉链路干扰既可能挑战星座内部数据交换的可靠性，也可能危及覆盖相同或邻近区域的多重卫星星座（例如由不同运营商部署）的高效共存。本文针对毫米波与太赫兹交叉链路卫星通信，提出了相关的数学模型与广泛的仿真研究。研究结果表明，在所考虑的配置中，交叉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索与考量。