移动近场太赫兹通信中意外的远-近-远转变
信号处理
2026-07-06 v1
摘要
在太赫兹频率下，辐射近场距离可能足够大，以至于在实际部署中具有重要意义。现有的近场公式通常以一种简单的方式理解：随着链路距离的减小，传播机制预计只会改变一次，即从远场变为近场。本文表明，对于倾斜下倾的接入点服务于沿地面移动的地面用户的情况，这种直觉可能失效。沿这样的路径，链路距离和视角同时变化，因此近场到远场的转变可能发生多次，产生意外的远-近-远转变。本文推导了倾斜ULA到点和UPA到点场景中这种转变发生的解析条件，并计算了地面上相应的转变点。数值结果验证了分析，并进一步表明这种行为强烈依赖于部署几何形状，也可能在较低频率下出现。
引用
@article{arxiv.2607.05630,
title = {Unexpected Far-Near-Far Transition in Mobile Near Field Terahertz Communications},
author = {Peng Zhang and Hanmei Yuan and Zhe Wang and Vitaly Petrov and Emil Björnson},
journal= {arXiv preprint arXiv:2607.05630},
year = {2026}
}
备注
Accepted to IEEE SPAWC, 2026. Copyright 2026 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material, creating new works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works