Line-of-Sight MIMO via Intelligent Reflecting Surface

被引：18

作者：

Do, Heedong ^{[1
]}

Lee, Namyoon ^{[2
]}

Lozano, Angel ^{[3
]}

机构：

[1] POSTECH, Dept Elect Engn, Pohang 37673, South Korea

[2] Korea Univ, Sch Elect Engn, Seoul 02841, South Korea

[3] Univ Pompeu Fabra, Dept Informat & Commun Technol, Barcelona 08018, Spain

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2023年 / 22卷 / 06期

基金：

欧洲研究理事会; 新加坡国家研究基金会;

关键词：

Line-of-sight transmission; MIMO; multiantenna channels; mmWave frequencies; terahertz frequencies; intelligent reflecting surface; WIRELESS COMMUNICATIONS; CAPACITY; CHANNELS; MODEL; TRANSMISSION; VALIDITY; RECEIVER; FRESNEL; PHYSICS; LIMITS;

D O I：

10.1109/TWC.2022.3224035

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：

This paper deals with line-of-sight (LOS) MIMO communication via an intelligent reflecting surface (IRS). It is shown that the number of spatial degrees of freedom (DOF) afforded by this setting grows in proportion with the IRS aperture, as opposed to being dictated by the transmit and receive apertures; this buttresses the interest in IRS deployments at mmWave and terahertz frequencies, with wavelengths and transmission ranges small enough to enable LOS MIMO. Explicit and simple-to-implement IRS phase shifts are put forth that achieve, not only the maximum number of DOF, but the capacity, under a certain geometrical condition. The insights leading to the proposed phase shifts, and to the optimality condition itself, are asymptotic in nature, yet extensive simulations confirm that the performance is excellent for a broad range of settings and even if the optimality condition is not strictly met.

引用

页码：4215 / 4231

页数：17

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