Degrees of Freedom From the Six-Polarized MIMO Antenna in 1-D, 2-D, and 3-D Scattering Channels

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-06-09 DOI:10.1109/LAWP.2025.3577750

Dazhi Piao;Xingning Jia;Jiyin Wan;Li Li

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Abstract

Six-polarized (SP) multiple-input–multiple-output (MIMO) channel modeling method in the two-mirror, waveguide and reverberation cavity scenarios are presented based on the theory of image source, through which accurate electromagnetic fields in both the near and far fields can be obtained conveniently. The validity of this channel modeling has been verified by full-wave numerical simulations. Over those channels, channel degrees of freedom (DoF) of the SP MIMO system are investigated with multipath scattering increased gradually from 1-D to 2-D and 3-D space. Results show that, in free space, DoF larger than 3 can only be obtained in the near field, and in the far field it is almost a constant value of 2.5, however, in scattering environment, DoF is greatly increased. Specifically, over a cross section with area of 16 m², separated from the transmitter antenna by 10 wavelengths, in 1-D scattering channel, the maximum DoF can reach 5.50, and its mean value is 4.25. In 2-D and 3-D scattering channels, the maximum DoF is 5.67 and 5.76, and the mean value is 4.70 and 4.93, respectively.

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六极化MIMO天线在一维、二维和三维散射通道中的自由度

基于像源理论，提出了双反射镜、波导和混响腔三种场景下的六极化多输入多输出（SP）通道建模方法，可以方便地获得近场和远场的精确电磁场。全波数值模拟结果验证了该模型的有效性。在这些信道上，研究了SP MIMO系统的信道自由度（DoF），多径散射从一维到二维和三维空间逐渐增加。结果表明，在自由空间中，只有在近场才能获得大于3的DoF，而在远场中，DoF几乎是恒定的2.5，而在散射环境中，DoF大大增加。具体而言，在1-D散射通道中，在16 m2的横截面上，与发射机天线相隔10个波长，最大DoF可达5.50，其平均值为4.25。在二维和三维散射通道中，最大自由度分别为5.67和5.76，平均值分别为4.70和4.93。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.