Beamspace Modulation for Near Field Capacity Improvement in XL-MIMO Communications

IF 4.6 3区计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Wireless Communications Letters Pub Date : 2023-03-18 DOI:10.1109/LWC.2023.3277666

Shuaishuai Guo;Kaiqian Qu

引用次数: 1

Abstract

The spatial degrees of freedom (DoFs) greatly increase in the near-field region of millimeter wave or terahertz multiple-input multiple-output communications with extremely large antenna arrays (XL-MIMO). To employ the increased spatial DoFs, a beamspace modulation (BM) strategy is introduced to the near field of XL-MIMO. BM can work with a fixed small number of RF chains. It exploits the increased spatial DoFs as modulation resources for capacity improvements. The achievable spectral efficiency and its asymptotic capacity are analyzed. Both theoretical and simulation results show that the proposed BM strategy considerably outperforms the existing benchmark that only selects the best beamspace for data transmission in terms of spectral efficiency.

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用于提高XL-MIMO通信近场容量的波束空间调制

在具有超大天线阵列（XL-MIMO）的毫米波或太赫兹多输入多输出通信的近场区域中，空间自由度（DoFs）大大增加。为了使用增加的空间DoF，在XL-MIMO的近场中引入了波束空间调制（BM）策略。BM可以使用固定的少量RF链。它利用增加的空间DoF作为调制资源来提高容量。分析了可实现的谱效率及其渐近容量。理论和仿真结果都表明，所提出的BM策略在频谱效率方面大大优于仅选择最佳波束空间进行数据传输的现有基准。

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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来源期刊

IEEE Wireless Communications Letters Engineering-Electrical and Electronic Engineering

CiteScore

12.30

自引率

6.30%

发文量

481

期刊介绍： IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.