4 papers
Cramér-Rao Bound Analysis for Cell-Free ISAC Systems with Fluid Intelligent Metasurfaces
Changhao He, Asmaa Abdallah, Ahmed M. Eltawil
Fluid intelligent metasurface (FIM) is an emerging antenna architecture that continuously reshapes its physical geometry to optimize wireless performance. While existing studies on…
Visibility-Region Coupling in XL-MIMO AGV Fleets: Triple-Role Modeling and Masked Beamforming
Changhao He, Xiaojuan Zhang
Extremely large-scale multiple-input multiple-output (XL-MIMO) is a promising technology for supporting automated guided vehicle (AGV) fleets in smart port terminals. However, the…
A Unified Dual Framework for Sparse-Array Near-Field Beam Focusing With Spatial Interference Suppression
Changhao He, Xiaojuan Zhang, Francois Chin Po Shin
We study sparse-array near-field beam focusing with spatial interference suppression, a problem arising in coherent satellite formations and other distributed non-terrestrial array…
Twin-in-the-Loop Optimization and Fundamental Limits of Position--Velocity Estimation in Cell-Free ISAC Systems
Changhao He, Xiaojuan Zhang, Geoffrey Ye Li
Digital twin (DT) networks require tight integration with wireless sensing, yet the fundamental limits of such coupling in cell-free integrated sensing and communication (ISAC) sys…