Orbital-Angular-Momentum Versus MIMO: Orthogonality, Degree of Freedom, and Capacity

被引:0
|
作者
Jing, Haiyue [1 ]
Cheng, Wenchi [1 ]
Xia, Xiang-Gen [2 ]
Zhang, Hailin [1 ]
机构
[1] Xidian Univ, State Key Lab Integrated Serv Networks, Xian, Shaanxi, Peoples R China
[2] Univ Delaware, Dept Elect & Comp Engn, Newark, DE 19716 USA
来源
2018 IEEE 29TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) | 2018年
基金
中国国家自然科学基金;
关键词
Terms Orbital-angular-momentum (OAM); uniform circular array (UCA); orthogonality; degree of freedom (DoF); capacity; multiple-input-multiple-output (MIMO);
D O I
暂无
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
The plane wave based wireless communications have becoming more and more matured, along with the well utilization of the traditional resources such as time and frequency. To further increase the capacity for rapidly increasing capacity demand of wireless communications, it is potential to use the twist wave, which has the orbital angular momentum (OAM). In this paper, we discuss the OAM based wireless communications in the aspect of orthogonality, degree of freedom (DoF), and capacity, where both the transmitter and the receiver use uniform circular array (UCA) antennas. In particular, we compare OAM based wireless communications with multiple-input-multiple-output (MIMO) based wireless communications in terms of DoF and capacity. Numerical results are presented to validate and evaluate that the DoF of OAM based wireless communications is greater than or equal to that of correlated MIMO based wireless communications when the transmitter and the receiver antennas are aligned well. The OAM based wireless communications can achieve larger capacity than the correlated MIMO in high signal-to-noise ratio (SNR) region under line-of-sight scenario.
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页数:7
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