Beam Squint Inspired Multiple Access Technique in Massive MIMO Systems
Beam Squint Inspired Multiple Access Technique in Massive MIMO Systems
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DOI：
10.1109/vtc2022-fall57202.2022.10012917
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Abuu B. Kihero;Liza Afeef;H. Arslan
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文献类型：
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作者：
Abuu B. Kihero;Liza Afeef;H. Arslan
大规模多输入多输出（mMIMO）系统在实现宽带信号时存在波束斜视问题。在多载波系统中，波束斜视导致波束向多个不需要的方向扩散，从而降低系统容量。本文提出了控制和利用波束斜视现象的用户调度和预编码技术，以服务多个用户，提高系统的整体容量。所提出的技术是基于透镜天线子阵列（LAS） mMIMO系统。本文解释了所提出的系统设计，并根据不同用户数量和射频链的波束增益和容量进行了数值评估。仿真结果表明，在波束增益和容量方面，性能得到了显著提高，证实了利用波束斜视现象为多个空间分离的用户群体服务的想法。
Massive multiple-input multiple-output (mMIMO) systems implementing wideband signaling have been found to suffer from beam squinting problem. In multicarrier systems, beam squint causes spreading of the beam to multiple undesired directions, thereby degrading system capacity. This paper proposes user scheduling and precoding techniques that controls and exploit the beam squinting phenomenon to serve multiple users and improve the overall system capacity. The proposed techniques are based on the lens antenna subarray (LAS) mMIMO system. The proposed system design is explained and numerically evaluated in terms of beam gain and capacity with different number of users and RF chains. The simulation results exhibit significant performance enhancement in terms of beam gain and capacity, corroborating the idea of exploiting the beam squinting phenomenon to serve multiple spatially separated groups of users.