A time-varying multi-ray channel model suitable for inter-satellite link simulation and performance evaluation is proposed aiming at the characteristics of the space communication environment. This model analyzes the propagation process and multi-dimensional characteristics of the terahertz (THz) waves between the satellite and the space station. The receiving environment of the space station is constantly changing due to the rotation of the station's solar panels with the sun and the relative motion between the station and the satellite. To predict critical multipath events for a specific communication configuration, the method of ray tracing, which is combined with the consistent orbiting theory and geometric orbital theory, is used to analyze the channel characteristics of different inter-satellite links at the THz band (220 GHz). The research content includes the path loss model, the multipath statistics, the small scale fading and some other related channel characteristics. The space THz multi-dimensional time domain, space domain, and frequency domain characteristics are obtained by studying the structural characteristics of the space station and space environment, the law of position change between the space station and the satellite, and the relative motion between the satellite and the space station. The study on the characteristics of the THz time-varying channel provides a reference for the prediction and planning of THz wave propagation in future inter-satellite links.

中文翻译：

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基于射线追踪的太赫兹波段星空站信道特性分析

针对空间通信环境的特点，提出了一种适用于星间链路仿真和性能评估的时变多射线信道模型。该模型分析了太赫兹（THz）波在卫星与空间站之间的传播过程和多维特性。由于空间站的太阳能电池板随太阳旋转以及空间站与卫星之间的相对运动，空间站的接收环境不断变化。为了预测特定通信配置的关键多径事件，光线追踪方法结合一致轨道理论和几何轨道理论，用于分析太赫兹频段（220 GHz）不同星间链路的信道特性。 ）。研究内容包括路径损耗模型、多径统计、小尺度衰落等一些相关的信道特性。空间太赫兹多维时域、空域、频域特性是通过研究空间站和空间环境的结构特征、空间站与卫星之间的位置变化规律以及空间站与卫星之间的相对运动而得到的。卫星和空间站。太赫兹时变信道特性的研究为未来星间链路中太赫兹波传播的预测和规划提供了参考。通过研究空间站和空间环境的结构特征、空间站与卫星之间的位置变化规律、卫星与空间站之间的相对运动，得到频域特性。太赫兹时变信道特性的研究为未来星间链路中太赫兹波传播的预测和规划提供了参考。通过研究空间站和空间环境的结构特征、空间站与卫星之间的位置变化规律、卫星与空间站之间的相对运动，得到频域特性。太赫兹时变信道特性的研究为未来星间链路中太赫兹波传播的预测和规划提供了参考。