Design and Implementation of MIMO Transmission Based on Dual-Polarized Reconfigurable Intelligent Surface

TL;DR

This paper introduces a novel MIMO transmission architecture utilizing dual-polarized reconfigurable intelligent surfaces that enables multichannel signal modulation without traditional RF chains, promising cost-effective ultra-massive MIMO solutions.

Contribution

It proposes a new RIS-based MIMO architecture that simplifies hardware and enhances integration, validated through prototype experiments.

Findings

Prototype confirms feasibility of dual-polarized RIS MIMO system.

Architecture reduces reliance on complex RF chains.

Experimental results demonstrate effective multichannel transmission.

Abstract

Multiple-input multiple-output (MIMO) signaling is one of the key technologies of current mobile communication systems. However, the complex and expensive radio frequency (RF) chains have always limited the increase of MIMO scale. In this paper, we propose a MIMO transmission architecture based on a dual-polarized reconfigurable intelligent surface (RIS), which can directly achieve modulation and transmission of multichannel signals without the need for conventional RF chains. Compared with previous works, the proposed architecture can improve the integration of RIS-based transmission systems. A prototype of the dual-polarized RIS-based MIMO transmission system is built and the experimental results confirm the feasibility of the proposed architecture. The dual-polarized RIS-based MIMO transmission architecture provides a promising solution for realizing low-cost ultra-massive MIMO towards future networks.