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arXiv 2404.12752eess.SP
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用户中心无蜂窝(UCCF)无线系统:原理与优化

User-Centric Cell-Free (UCCF) Wireless Systems: Principles and Optimization

Lie-Liang Yang

AI总结:

本文介绍用户中心无蜂窝(UCCF)无线系统的原理,涵盖信道建模、上行检测、下行传输及资源优化,并分析其相对传统蜂窝的优势与实施挑战。

摘要:

用户中心无蜂窝(UCCF)无线网络具有一系列显著特性,这些特性可用于应对传统蜂窝系统难以解决的一些挑战。本章致力于阐述UCCF系统中无线通信的基础知识,包括信道建模与估计、上行链路(UL)检测、下行链路(DL)传输以及资源优化。具体而言,与传统的蜂窝系统相比,本文考察了无蜂窝组网的优势。基于最小均方误差(MMSE)和简略传播原理,探讨了全局和位置感知的分布式UL检测。相应地,基于MMSE预编码设计了全局和分布式DL传输方案。从系统设计和资源分配的角度分析了UL和DL的优化问题。此外,还识别并分析了UCCF系统在实际实施中的一些挑战。

英文摘要:

User-centric cell-free (UCCF) wireless networks have a range of distinguished characteristics, which can be exploited for meeting some challenges that the conventional cellular systems are hard to. This chapter is devoted to delivering the fundamentals of wireless communications in UCCF systems, including channel modeling and estimation, uplink (UL) detection, downlink (DL) transmission, and resource optimization. Specifically, the advantages of cell-free networking are examined in contrast to the conventional celluar systems. The global and location-aware distributed UL detection are explored in the principles of minimum mean-square error (MMSE) and brief propagation. Correspondingly, the global and distributed DL transmission schemes are designed based on the MMSE precoding. The optimization of both UL and DL is analyzed with respect to system design and resource-allocation. Furthermore, some challenges for the implementation of UCCF systems in practice are identified and analyzed.

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。

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