Distributed MIMO Networks With Rotary ULAs for Indoor Scenarios Under Rician Fading

IF 6.3 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Open Journal of the Communications Society Pub Date : 2024-10-04 DOI:10.1109/OJCOMS.2024.3474170
Eduardo N. Tominaga;Onel L. A. López;Tommy Svensson;Richard D. Souza;Hirley Alves
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Abstract

The Fifth-Generation (5G) wireless communications networks introduced native support for Machine-Type Communications (MTC) use cases. Nevertheless, current 5G networks cannot fully meet the very stringent requirements regarding latency, reliability, and number of connected devices of most MTC use cases. Industry and academia have been working on the evolution from 5G to Sixth Generation (6G) networks. One of the main novelties is adopting Distributed Multiple-Input Multiple-Output (D-MIMO) networks. However, most works studying D-MIMO consider antenna arrays with no movement capabilities, even though some recent works have shown that this could bring substantial performance improvements. In this work, we propose the utilization of Access Points (APs) equipped with Rotary Uniform Linear Arrays (RULAs) for this purpose. Considering a spatially correlated Rician fading model, the optimal angular position of the RULAs is jointly computed by the central processing unit using particle swarm optimization as a function of the location of the active devices. Considering the impact of imperfect location estimates, our numerical results show that the RULAs’s optimal rotation brings substantial performance gains in terms of mean per-user spectral efficiency. The improvement grows with the strength of the line-of-sight components of the channel vectors. Given the total number of antenna elements, we study the trade-off between the number of APs and the number of antenna elements per AP, revealing an optimal number of APs for the cases of APs equipped with static ULAs and RULAs.
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针对室内场景的分布式 MIMO 网络与旋转式 ULA,适用于 Rician Fading 环境
第五代(5G)无线通信网络引入了对机器类型通信(MTC)用例的本机支持。然而,当前的 5G 网络无法完全满足大多数 MTC 用例对延迟、可靠性和连接设备数量的严格要求。业界和学术界一直致力于从 5G 网络向第六代(6G)网络演进。其中一项主要创新是采用分布式多输入多输出(D-MIMO)网络。然而,大多数研究 D-MIMO 的工作都考虑了没有移动能力的天线阵列,尽管最近的一些工作表明这可以带来实质性的性能提升。在这项工作中,我们建议为此利用配备旋转均匀线性阵列(RULAs)的接入点(AP)。考虑到空间相关的里西恩衰减模型,RULA 的最佳角度位置由中央处理单元利用粒子群优化联合计算,作为有源设备位置的函数。考虑到不完美位置估计的影响,我们的数值结果表明,RULAs 的最佳旋转在平均每用户频谱效率方面带来了显著的性能提升。这种改进随信道矢量的视距分量的强度而增长。考虑到天线元件总数,我们研究了接入点数量和每个接入点天线元件数量之间的权衡,揭示了配备静态 ULA 和 RULAs 的接入点的最佳接入点数量。
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来源期刊
CiteScore
13.70
自引率
3.80%
发文量
94
审稿时长
10 weeks
期刊介绍: The IEEE Open Journal of the Communications Society (OJ-COMS) is an open access, all-electronic journal that publishes original high-quality manuscripts on advances in the state of the art of telecommunications systems and networks. The papers in IEEE OJ-COMS are included in Scopus. Submissions reporting new theoretical findings (including novel methods, concepts, and studies) and practical contributions (including experiments and development of prototypes) are welcome. Additionally, survey and tutorial articles are considered. The IEEE OJCOMS received its debut impact factor of 7.9 according to the Journal Citation Reports (JCR) 2023. The IEEE Open Journal of the Communications Society covers science, technology, applications and standards for information organization, collection and transfer using electronic, optical and wireless channels and networks. Some specific areas covered include: Systems and network architecture, control and management Protocols, software, and middleware Quality of service, reliability, and security Modulation, detection, coding, and signaling Switching and routing Mobile and portable communications Terminals and other end-user devices Networks for content distribution and distributed computing Communications-based distributed resources control.
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