Beam Squint Effect in Multi-Beam mmWave Massive MIMO Systems

被引:3
|
作者
Afeef, Liza [1 ]
Arslan, Huseyin [1 ]
机构
[1] Istanbul Medipol Univ, Dept Elect & Elect Engn, TR-34810 Istanbul, Turkey
来源
2022 IEEE 96TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2022-FALL) | 2022年
关键词
Beam squint effect; capacity; inter-beam interference (IBI); massive MIMO; mmWave; orthogonal beams;
D O I
10.1109/VTC2022-Fall57202.2022.10012765
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In multicarrier wideband millimeter-wave (mmWave) communications, as the size of antenna array increases, as in massive multiple-input multiple-output (MIMO), an additional propagation delay of the electromagnetic wave at each antenna element is introduced comparable to (or greater than) the symbol duration, resulting in producing a displacement in beam direction at each subcarrier frequency or as it calls beam squinting. With multi-beam transmission in massive MIMO systems, due to beam squinting effect, an additional inter-beam interference (IBI) can be introduced to the system which significantly decreases the overall system capacity. Therefore, in this paper, IBI under beam squint effect is modeled for different subcarrier frequencies and beam angles in a multi-beam mmWave massive MIMO system. In addition, the impact of this IBI model on the system capacity is evaluated. The analysis results show that beam squinting causes a significant increase in IBI level, even when transmitting with orthogonal beams. Moreover, the results provide the optimal number of beams for a given antenna array size to maximize the system's capacity considering beam squinting phenomena.
引用
收藏
页数:5
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