Electromagnetic Channel Modeling Theory and Approaches for Holographic MIMO Wireless Communications

HUANG Chongwen; JI Ran; WEI Li; GONG Tierui; CHEN Xiaoming; SHA Wei; YANG Jun; ZHANG Zhaoyang; Yuen Chau

doi:10.11999/JEIT231219

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HUANG Chongwen, JI Ran, WEI Li, GONG Tierui, CHEN Xiaoming, SHA Wei, YANG Jun, ZHANG Zhaoyang, Yuen Chau. Electromagnetic Channel Modeling Theory and Approaches for Holographic MIMO Wireless Communications[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231219

Citation:

HUANG Chongwen, JI Ran, WEI Li, GONG Tierui, CHEN Xiaoming, SHA Wei, YANG Jun, ZHANG Zhaoyang, Yuen Chau. Electromagnetic Channel Modeling Theory and Approaches for Holographic MIMO Wireless Communications[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231219

Citation:

HUANG Chongwen, JI Ran, WEI Li, GONG Tierui, CHEN Xiaoming, SHA Wei, YANG Jun, ZHANG Zhaoyang, Yuen Chau. Electromagnetic Channel Modeling Theory and Approaches for Holographic MIMO Wireless Communications[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT231219

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Electromagnetic Channel Modeling Theory and Approaches for Holographic MIMO Wireless Communications

doi: 10.11999/JEIT231219

1.
College of Information science & Electronic Engineering, Zhejiang University, Hangzhou 310027, China
2.
Singapore university of technology and design, Singapore 487372
3.
School of Information and Communications Engineering, Xi'an Jiaotong University, Xi’an 710049, China
4.
Shenzhen Zhongxing Telecom Equipment Limited, Shenzhen 518000, China
5.
Nanyang Technological University, Singapore 639798

Funds: The National Key R&D Program (2021YFA1000500, 2023YFB2904800), The National Natural Science Foundation of China (62331023, 62101492, 62394292, U20A20158), Zhejiang Provincial Natural Science Foundation (LR22F010002), Zhejiang Provincial Science and Technology Plan Project (2024C01033), Zhejiang University Global Cooperation Fund

Received Date: 2023-11-02
Rev Recd Date: 2024-03-18

Available Online: 2024-03-19

Abstract

Abstract

Holographic Multiple-Input Multiple-Output (HMIMO) is an emerging technology for 6G communications. This type of array is composed of densely distributed antenna elements within a fixed aperture area. It is an extension of Massive MIMO technology under the practical constraints of antenna aperture. HMIMO systems have great potential in significantly improving wireless communication performance. However, due to the presence of closely spaced antennas, and the distane between antennas is less than half of the length, severe coupling effects are inevitable and traditional assumption of independent and identically distributed channel is invalid. Thus, designing an effective and practical channel model becomes one of the most challenging problems in HMIMO researches. To address these challenges, this paper investigates four channel modeling approaches based on electromagnetic field theory. The first approach is based on the plane Green’s function and models the integral of Green’s functions between planes with high complexity. The second and third approaches approximate the communication channel in HMIMO using plane wave expansion and spherical wave expansion, respectively, with lower complexity. The channel modeling based on plane wave expansion is relatively simple and is more suitable for far field, but would underestimate the maximum capacity of the system under strong coupling between antennas. The channel modeling based on spherical wave expansion better captures the characteristics of the electromagnetic wave channel but comes with higher complexity. Finally, a channel modeling method based on random Green’s functions is introduced, primarily describing the random characteristics of electromagnetic waves in rich scattering environments or Rayleigh channels.
- Holographic Multiple-Input Multiple-Output (MIMO),
- Electromagnetic theory,
- Channel modeling

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References(28)

References

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