6 papers
Bending the Rules of Propagation: Caustic Beamforming for Next-Generation Wireless Systems
Shicong Liu, Xianghao Yu, Robert Schober
Conventional beamforming techniques primarily steer energy along desired directions or focus it at specific locations. These techniques become fragile when facing frequent blockage…
Robust and Secure Near-Field Communication via Curved Caustic Beams
Shicong Liu, Xianghao Yu, Robert Schober
Near-field beamfocusing with extremely large aperture arrays can effectively enhance physical layer security. Nevertheless, even small estimation errors of the eavesdropper's locat…
Near-Field Communication with Massive Movable Antennas: An Electrostatic Equilibrium Perspective
Shicong Liu, Xianghao Yu, Shenghui Song +1
Recent advancements in large-scale position-reconfigurable antennas have opened up new dimensions to effectively utilize the spatial degrees of freedom (DoFs) of wireless channels.…
Flow Matching-Based Active Learning for Radio Map Construction with Low-Altitude UAVs
Hao Sun, Shicong Liu, Xianghao Yu +1
The employment of unmanned aerial vehicles (UAVs) in the lowaltitude economy necessitates precise and real-time radio maps for reliable communication and safe navigation. However,…
Near-Field Communication with Massive Movable Antennas: A Functional Perspective
Shicong Liu, Xianghao Yu, Jie Xu +1
The advent of massive multiple-input multiple-output (MIMO) technology has provided new opportunities for capacity improvement via strategic antenna deployment, especially when the…
Sensing-Enhanced Channel Estimation for Near-Field XL-MIMO Systems
Shicong Liu, Xianghao Yu, Zhen Gao +3
Future sixth-generation (6G) systems are expected to leverage extremely large-scale multiple-input multiple-output (XL-MIMO) technology, which significantly expands the range of th…