Spatially structured beams have emerged as a promising technology for enhancing spectrum efficiency (SE) in sixth-generation (6G) networks. However, structured beam schemes based on fixed-position antennas (FPAs) fail to fully exploit the array aperture, thereby limiting their topological reconfigurability and adaptability to diverse communication scenarios. To overcome these limitations, this paper proposes a novel structured beam communication framework exploiting movable antennas (MAs) to achieve reconfigurable array topologies. Specifically, we develop an MA-based geometric modeling framework to construct a variety of practical array topologies, thereby enabling the realization of diverse array configurations utilizing a unified hardware platform. Furthermore, we investigate the joint design of the array topology and the structured beamforming vector to efficiently exploit the array aperture and facilitate the multiplexing of orthogonal spatial modes. Accordingly, we formulate the corresponding beam generation and demodulation schemes and derive the channel gains under varying array topologies. We also propose an alternating optimization algorithm to jointly optimize the array topology configuration, the antenna element positions, and the structured beamforming vector, with the aim of maximizing the system SE. Numerical results demonstrate that the proposed joint design significantly enhances the SE compared to conventional FPA schemes. By synergizing the spatial multiplexing degrees of freedom (DoFs) of structured beams with the mobility DoFs of MAs within 2D planar regions, this work establishes a reconfigurable and practical framework for structured beam-based wireless communications.
A Survey on Reconfigurable and Movable Antennas for Wireless Communications and Sensing
National University of Singapore（新加坡国立大学）；South China University of Technology（华南理工大学）；Nanyang Technological University（南洋理工大学）；King Abdullah University of Science and Technology (KAUST)（阿卜杜拉国王科技大学）；Beijing Institute of Technology（北京理工大学）
Artificial Intelligence for Spatially Reconfigurable Antennas: Movable, Fluid, and Pinching Antenna Systems
Phenikaa University（菲尼亚卡大学）；University of Essex（埃塞克斯大学）；VSB-Technical University of Ostrava（俄斯特拉发科技大学）；Harbin Institute of Technology, Shenzhen（哈尔滨工业大学（深圳））；Zhejiang Gongshang University（浙江工商大学）
This paper presents two novel topologies for automatically transforming power converter topology from three-phase 3-level cascaded H-bridge to three-phase 2-level converter design. These techniques are implemented by flicking specific switches to rearrange circuit connections. The switches can be controlled by signals in order to realize automation.
Robust Transceiver Design for RIS Enhanced Dual-Functional Radar-Communication with Movable Antenna
National Key Laboratory of Wireless Communications, University of Electronic Science and Technology of China（电子科技大学无线通信国家重点实验室）；School of Information Science and Engineering, Shandong University（山东大学信息科学与工程学院）；China Mobile Research Institute（中国移动研究院）
Active Movable-Element RIS Assisted Vehicular Semantic Communications: Modeling and Optimization
Jiangnan University（江南大学）；Nanchang University（南昌大学）；Tsinghua University（清华大学）；Brunel University of London（伦敦布鲁内尔大学）；Shanghai Jiao Tong University（上海交通大学）
Movable Antenna-Enhanced MIMO-OFDM ISAC: Ambiguity Function Analysis, Waveform Design and Antenna Position Optimization
Beijing Institute of Technology（北京理工大学）；School of Information and Electronic Engineering, Beijing University of Posts and Telecommunications（北京邮电大学信息工程学院）
Efficient Discrete Position Design for Movable Antenna Systems: Low Complexity and Robustness
City University of Hong Kong（香港城市大学）；Microsoft Research Asia（微软亚洲研究院）；Shaanxi Key Laboratory of Deep Space Exploration and Intelligent Information Technology, the School of Information and Communications Engineering, Faculty of Electronic and Information Engineering, Xi’an Jiaotong University（西安交通大学电子与信息工程学院信息通信工程系深空探测与智能信息技术陕西省重点实验室）；National Mobile Communications Research Laboratory, Southeast University（东南大学移动通信国家重点实验室）；The Chinese University of Hong Kong（香港中文大学）
University of Maryland（马里兰大学）；Intelligent Automation, Inc.（智能自动化公司）
By moving from massive antennas to antenna surfaces for software-defined wireless systems, the reconfigurable intelligent surfaces (RISs) rely on arrays of unit cells to control the scattering and reflection profiles of signals, mitigating the propagation loss and multipath attenuation, and thereby improving the coverage and spectral efficiency. In this paper, covert communication is considered in the presence of the RIS. While there is an ongoing transmission boosted by the RIS, both the intended receiver and an eavesdropper individually try to detect this transmission using their own deep ne…
Flexible Beamforming Design with Two-layer Rotatable Antenna: Synergizing Array and Antenna Rotations
The Chinese University of Hong Kong, Shenzhen（香港中文大学（深圳））；Southern University of Science and Technology (SUSTech)（南方科技大学）；University of Waterloo（滑铁卢大学）；National University of Singapore（新加坡国立大学）
Discrete Antenna Positioning and Beamforming Design for RIS-Assisted MA Secure ISAC Systems
Xi’an Jiaotong University（西安交通大学）；Stevens Institute of Technology（史蒂文斯理工学院）；Southeast University（东南大学）；Tongji University（同济大学）；Beijing University of Posts and Telecommunications（北京邮电大学）；Shanghai Jiao Tong University（上海交通大学）
