Movable Antennas Enabled ISAC Systems: Fundamentals, Opportunities, and Future Directions

TL;DR

This paper explores the use of movable antennas in integrated sensing and communication systems, highlighting their potential to improve spectral efficiency, beamforming flexibility, and coverage, while discussing future research challenges.

Contribution

It introduces the fundamental principles of movable antennas in ISAC systems, summarizes their advantages, and presents a case study demonstrating performance gains in transmit power.

Findings

Enhanced spectral efficiency with MA-enabled ISAC systems

Improved beamforming flexibility and coverage range

Performance gains in transmit power demonstrated

Abstract

The movable antenna (MA)-enabled integrated sensing and communication (ISAC) system attracts widespread attention as an innovative framework. The ISAC system integrates sensing and communication functions, achieving resource sharing across various domains, significantly enhancing communication and sensing performance, and promoting the intelligent interconnection of everything. Meanwhile, MA utilizes the spatial variations of wireless channels by dynamically adjusting the positions of MA elements at the transmitter and receiver to improve the channel and further enhance the performance of the ISAC systems. In this paper, we first outline the fundamental principles of MA and introduce the application scenarios of MA-enabled ISAC systems. Then, we summarize the advantages of MA-enabled ISAC systems in enhancing spectral efficiency, achieving flexible and precise beamforming, and making the signal coverage range adjustable. Besides, a specific case is studied to show the performance gains in terms of transmit power that MA brings to ISAC systems. Finally, we discuss the challenges of MA-enabled ISAC and future research directions, aiming to provide insights for future research on MA-enabled ISAC systems.