6 papers
Effective DoF Collapse in Sparse Near-Field Beamforming: A Block-Rank-1 Mechanism
Changhao He, Xiaojuan Zhang, Francois Chin Po Shin
Sparse near-field arrays phase-cohere widely separated sub-arrays of elements and underpin distributed MIMO, satellite formations, and integrated sensing and communication.…
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…
OTFS for Joint Radar and Communication: Algorithms, Prototypes, and Experiments
Xiaojuan Zhang, Yonghong Zeng, Francois Chin Po Shin
We propose an Joint Radar and Communication (JRC) system that utilizes the Orthogonal Time Frequency Space (OTFS) signals. The system features a fast radar sensing algorithm for de…
Coordinated FMCW and OFDM for Integrated Sensing and Communication
Yuhong Wang, Yonghong Zeng, Sumei Sun +1
We propose a coordinated FMCW-OFDM (Co-FMCW-OFDM) system that enables integrated sensing and communication (ISAC) by allowing sensing and communication to share the same RF front e…