MIMO Interference Channels Assisted by Reconfigurable Intelligent Surfaces: Mutual Coupling Aware Sum-Rate Optimization Based on a Mutual Impedance Channel Model

被引：39

作者：

Abrardo, Andrea ^{[1
,2
]}

Dardari, Davide ^{[3
,4
]}

Di Renzo, Marco ^{[5
]}

Qian, Xuewen ^{[5
]}

机构：

[1] Univ Siena, I-53100 Siena, Italy

[2] CNIT, I-53100 Siena, Italy

[3] Univ Bologna, I-47521 Cesena, Italy

[4] WiLAB CNIT, I-47521 Cesena, Italy

[5] Univ Paris Saclay, CNRS, Cent Supelec, Lab Signaux & Syst, F-91192 Gif Sur Yvette, France

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2021年 / 10卷 / 12期

基金：

欧盟地平线“2020”;

关键词：

Transmitters; Optimization; Receiving antennas; Mutual coupling; Electromagnetics; MIMO communication; Dipole antennas; Reconfigurable intelligent surfaces; wireless;

D O I：

10.1109/LWC.2021.3109017

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

We study a multi-user multiple-input multiple-output interference network in the presence of multiple reconfigurable intelligent surfaces (RISs). The entire system is described by using a circuit-based model for the transmitters, receivers, and RISs. This is obtained by leveraging the electromagnetic tool of mutual impedances, which accounts for the signal propagation and the mutual coupling among closely-spaced scattering elements. An iterative and provably convergent optimization algorithm that maximizes the sum-rate of RIS-assisted multi-user interference channels is introduced. Numerical results show that the sum-rate is enhanced if the mutual coupling among the RIS elements is accounted for at the optimization stage.

引用

页码：2624 / 2628

页数：5

共 7 条

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