Fourier Plane-Wave Series Expansion for Holographic MIMO Communications

被引:120
作者
Pizzo, Andrea [1 ]
Sanguinetti, Luca [2 ]
Marzetta, Thomas L. [3 ]
机构
[1] Univ Pompeu Fabra, Dept Informat & Commun Technol, Barcelona 08018, Spain
[2] Univ Pisa, Dipartimento Ingn Informaz, I-56122 Pisa, Italy
[3] NYU, Dept Elect & Comp Engn, Tandon Sch Engn, Brooklyn, NY 11201 USA
关键词
Electromagnetic MIMO channel modeling; near-field communications; plane-wave decomposition; Fourier spectral representation; Holographic MIMO; MASSIVE MIMO; CHANNELS; SCATTERING; CAPACITY; ANTENNAS; IMPACT; LIMITS; MODEL;
D O I
10.1109/TWC.2022.3152965
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
Imagine a MIMO communication system that fully exploits the propagation characteristics offered by an electromagnetic channel and ultimately approaches the limits imposed by wireless communications. This is the concept of Holographic MIMO communications. Accurate and tractable channel modeling is critical to understanding its full potential. Classical stochastic models used by communications theorists are derived under the electromagnetic far-field assumption, i.e. planar wave approximation over the array. However, such assumption breaks clown when electromagnetically large (compared to the wave-length) antenna arrays are considered. In this paper, we start from the first principles of wave propagation and provide a Fourier plane-wave series expansion of the channel response, which fully captures the essence of electromagnetic propagation in arbitrary scattering and is also valid in the (radiative) near-field. The expansion is based on the Fourier spectral representation and has an intuitive physical interpretation, as it statistically describes the angular coupling between source and receiver. When discretized uniformly, it leads to a low-rank semi-unitarily equivalent approximation of the electromagnetic channel in the angular domain. The developed channel model is used to compute the ergodic capacity of a point-to-point Holographic MIMO system with different degrees of channel state information.
引用
收藏
页码:6890 / 6905
页数:16
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