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cs.IT2026
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.…
cs.IT2026
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…
cs.IT2025
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…