Optimizing Movable Antenna Position and Transmissive RIS Phase for Efficient Base Station Design

TL;DR

This paper introduces a novel base station design integrating movable antennas and transmissive RIS, optimizing their joint configuration to improve signal strength and system performance for future 6G networks.

Contribution

It presents a compact, integrated architecture for base stations that jointly optimizes antenna placement and RIS phase, enhancing wireless communication efficiency.

Findings

A joint optimization framework improves signal strength with low-resolution phase shifters.

Antenna mobility increases SNR and system flexibility.

The design is cost-effective and energy-efficient for 6G deployment.

Abstract

Movable antennas (MA) and transmissive reconfigurable intelligent surfaces (TRIS) represent two innovative technologies that significantly enhance the flexibility of wireless communication systems. In this paper, we propose a novel and compact base station architecture that synergistically integrates a movable antenna with a transmissive RIS in the near field, enabling joint optimization of antenna positioning and TRIS phase adjustments. The proposed model compensates for phase quantization loss and significantly enhances signal strength, even with low-resolution (1-2 bit) phase shifters. Leveraging this framework, we systematically evaluate system performance as a function of TRIS size and antenna placement. Our results indicate that antenna mobility provides an additional degree of freedom to enhance the desired signal and achieve a higher SNR, particularly when combined with TRIS capabilities. These findings demonstrate that MA-TRIS integration offers a cost-effective and energy-efficient pathway toward compact 6G base stations, combining hardware simplicity with strong performance gains.