一种面向6G低轨卫星对地通信系统的动态射线追踪信道模型

中文摘要 AI 辅助

第六代（6G）通信系统设想了一个空天地一体化网络，使得精确的卫星对地（S2G）信道建模对通信系统设计至关重要。目前，大多数S2G信道模型依赖于随机方法，这些方法无法基于真实的卫星轨道和环境提供多径信息。在本文中，我们提出了一种基于动态射线追踪的新型低地球轨道（LEO）S2G信道模型，通过设置虚拟传输平面（VTP）来克服长距离传播中射线追踪的挑战。此外，由于视距传播机制对卫星通信贡献了最大的功率，VTP基于第一菲涅尔区构建，以生成靠近地面的平行射线。所提出的LEO S2G射线追踪信道模型使用了真实的卫星轨道和环境信息来计算信道特性。结果表明，所提出的LEO S2G射线追踪信道模型能够基于卫星轨道准确地生成信道特性。通过所提出的射线追踪方法计算的LEO S2G通信信道特性与信道测量结果能够很好地匹配。

英文摘要

The sixth generation (6G) communication systems envision a space-air-ground integrated network, making accurate satellite-to-ground (S2G) channel modeling crucial for communication systems design. Currently, the majority of S2G channel models rely on stochastic methods, which cannot provide multipath information based on realistic satellite orbits and environments. In this paper, we propose a novel low Earth orbit (LEO) S2G channel model based on dynamic ray-tracing to overcome the challenges of tracking rays for long-distance propagation by setting a virtual transmission plane (VTP). Moreover, since the line-of-sight propagation mechanism contributes the most power to satellite communications, the VTP is constructed based on the first Fresnel zone to generate parallel rays close to the ground. The realistic satellite orbit and environmental information are used in the proposed LEO S2G ray-tracing channel model to compute channel characteristics. The results show that the proposed LEO S2G ray-tracing channel model can accurately generate the channel characteristics based on the satellite orbits. The channel characteristics of LEO S2G communications computed by the proposed ray-tracing method can well match the channel measurements.

发表机构

• Purple Mountain Laboratories（紫金山实验室）
• National Mobile Communications Research Laboratory, Southeast University（东南大学移动通信国家重点实验室）
• Tsinghua University（清华大学）
• University of Tabuk（塔布克大学）

机构由 AI 辅助整理，请以论文原文为准。