近场6G网络：为什么移动太赫兹通信必须在近场运行
Near-field 6G Networks: Why Mobile Terahertz Communications MUST Operate in the Near Field
AI总结：
本文通过数学建模和数值分析证明，仅在远场运行的移动太赫兹通信受严格带宽限制，因此宽带移动太赫兹通信必须在近场运行，而静止太赫兹链路则不受此约束。
摘要：
近场移动太赫兹（THz）通信是第六代（6G）网络中高速无线数据交换的候选使能技术之一。然而，在太赫兹近场中运行既带来诱人的机遇，也带来严峻的挑战。因此，探索是否有可能在不工作于太赫兹近场的情况下设计一个现实的移动太赫兹通信系统变得很有意义。为了回答这个问题，本文提出了一个数学框架，对仅在远场工作的移动太赫兹链路进行建模。该研究得出一个有趣的理论结论：虽然实际频率（几乎）无关紧要，但这样的系统必须在不超过某一阈值的有限带宽上运行。随后通过数值计算表明，仅在远场运行会对移动太赫兹通信施加严格的限制，从而使其对潜在的高速服务吸引力降低。相比之下，研究表明，即使完全保持在太赫兹远场，静止太赫兹链路仍然可以是宽带的。因此，宽带移动太赫兹通信必须在近场运行，而宽带静止太赫兹链路则不必如此。
英文摘要：
Near-field mobile terahertz (THz) communications is one of the candidate enablers for high-rate wireless data exchange in sixth-generation (6G) networks. However, operating in the THz near field brings both attractive opportunities and severe challenges. Hence, it becomes of interest to explore if it is possible to design a realistic mobile THz communication system without working in the THz near field. To answer this question, a mathematical framework is presented modeling a mobile THz link that works exclusively in the far field. The study leads to an interesting theoretical conclusion: while the actual frequency is of (almost) no interest, such a system must operate over a limited bandwidth not exceeding a certain threshold. It is then numerically shown that operating only in the far field imposes stringent limitations on mobile THz communications, thus making them less attractive to prospective high-rate services. In contrast, it is shown that a stationary THz link can still be broadband even when staying exclusively in the THz far field. Hence, broadband mobile THz communications MUST be near-field, while broadband stationary THz links do not have to.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
