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About this paper
Tierui Gong, Li Wei, Chongwen Huang, George C. Alexandropoulos, Mérouane Debbah, Chau Yuen
This paper presents a comprehensive overview of near-field Holographic MIMO (H-MIMO) channel modeling and proposes novel, efficient electromagnetic (EM)-domain channel models. It categorizes existing approaches and introduces computationally efficient models (CDCM, CICM) and measurement-efficient models (PSCM, FSCM) that accurately capture spherical wavefronts and complex vector fields while reducing complexity, demonstrating improved spectral efficiency compared to conventional methods.
Key insights
- Near-field Holographic MIMO channels exhibit distinctive features like spherical wavefronts, complex vector wave fields, and distance-and-angle dependence, which significantly differentiate them from conventional far-field MIMO.
- Physically consistent electromagnetic (EM)-domain channel models, derived from Tensor Green's Function, are crucial for accurately capturing the vectorial nature and complex wave propagation of near-field H-MIMO, outperforming mathematically abstracted models.
- Efficient approximations of EM-domain models can significantly reduce computational and measurement complexity, making large-scale near-field H-MIMO channel modeling feasible without compromising accuracy.
Summary by alphaXiv.
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