无小区超大规模MIMO系统的上行链路性能

IF 7.1 2区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Vehicular Technology Pub Date : 2024-12-27 DOI:10.1109/TVT.2024.3523373

Hao Lei;Jiayi Zhang;Zhe Wang;Huahua Xiao;Bo Ai

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引用次数: 0

摘要

在本文中，我们研究了无单元（CF）超大规模多输入多输出（xml - mimo）系统的上行性能，这是未来无线通信的一种有前途的技术。更具体地说，我们考虑了具有多个基站（BSs）和多个用户设备（ue）的实际场景。为此，我们推导出任何组合方案的精确的可实现谱效率表达式。值得注意的是，我们导出了具有最大比值（MR）组合的CF XL-MIMO的封闭形式SE表达式。数值结果表明，与小小区XL-MIMO相比，CF XL-MIMO的SE性能有很大提高。有趣的是，天线间距越小，贴片天线之间的相关水平越高。最后，我们证明了增加BS天线数量可能会降低MR组合的SE性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Uplink Performance of Cell-Free Extremely Large-Scale MIMO Systems

In this paper, we investigate the uplink performance of cell-free (CF) extremely large-scale multiple-input-multiple-output (XL-MIMO) systems, which is a promising technique for future wireless communications. More specifically, we consider the practical scenario with multiple base stations (BSs) and multiple user equipments (UEs). To this end, we derive exact achievable spectral efficiency (SE) expressions for any combining scheme. It is worth noting that we derive the closed-form SE expressions for the CF XL-MIMO with maximum ratio (MR) combining. Numerical results show that the SE performance of the CF XL-MIMO can be hugely improved compared with the small-cell XL-MIMO. It is interesting that a smaller antenna spacing leads to a higher correlation level among patch antennas. Finally, we prove that increasing the number of BS antennas may decrease the SE performance with MR combining.

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来源期刊

IEEE Transactions on Vehicular Technology 工程技术-电信学

CiteScore

6.00

自引率

8.80%

发文量

1245

审稿时长

6.3 months

期刊介绍： The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.