动态信道知识图谱：基础、构建与应用
Dynamic Channel Knowledge Map: Fundamentals, Construction, and Applications
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中文总结 AI 辅助
针对无线通信网络发展带来的信道获取问题，提出动态信道知识图谱概念，介绍其基础，调研构建方法，讨论对相关技术的支持及协同设计方向，为其在6G系统中的作用提供架构视角。
中文摘要 AI 辅助
无线通信网络正朝着极大天线阵列、毫米波和太赫兹频段以及密集异构部署发展，这增加了信道维度，使信道获取成本上升。信道知识图谱（CKM）从地理位置到信道特征建立映射，提供特定位置先验信息以降低信道获取开销。但现有多数CKM研究聚焦于由建筑和地形等准静态环境结构塑造的准静态传播特征，未解决动态散射体、终端姿态变化和射频损伤引入的时变信道分量。本文提出动态CKM新概念，作为连接准静态环境先验与物理层信号处理的中间层，提供随时间演变的信道表示。首先介绍动态CKM基础，阐明其与准静态CKM和物理层的关系；接着调研代表性构建方法，讨论其对导频设计、干扰抑制及集成传感与通信的支持；最后概述动态CKM构建与物理层信号处理协同设计的关键开放研究方向。这些讨论为动态CKM在新兴6G系统中的作用提供了架构视角。
英文摘要
Wireless communication networks are evolving toward extremely large antenna arrays, millimeter-wave and terahertz bands, and dense heterogeneous deployments, all of which increase channel dimensionality and make channel acquisition increasingly costly. Channel knowledge map (CKM) establishes a mapping from geographical locations to channel characteristics, providing location-specific prior information to reduce the overhead of channel acquisition. Most existing CKM research, however, has focused on quasi-static propagation features shaped by quasi-static environmental structures such as buildings and terrain, leaving unaddressed the time-varying channel component introduced by dynamic scatterers, terminal attitude changes, and radio-frequency (RF) impairments. This article presents a new concept of dynamic CKM as a middle layer that links quasi-static environmental priors to physical-layer signal processing by providing time-evolving channel representations. We first introduce the fundamentals of dynamic CKM, clarifying its relationship with the quasi-static CKM and the physical layer. We then survey representative construction methods and discuss how dynamic CKM can support pilot design, interference suppression, and integrated sensing and communications. Finally, we outline key open research directions in the co-design of dynamic CKM construction and physical-layer signal processing. These discussions offer an architectural perspective on the role of dynamic CKM in emerging 6G systems.
