3 papers
eess.SP2026
Parametric Diffraction-Based Object Sensing: Modeling, Estimation, and Fundamental Limits
Jiaqi Xu, Bjorn Ottersten, A. Lee Swindlehurst
This paper proposes a rigorous framework for sensing of environmental objects using diffraction mechanisms prevalent at wireless communication frequencies. Specifically, we develop…
eess.SP2024
Non-Reciprocal Reconfigurable Intelligent Surfaces
Jiaqi Xu, Haoyu Wang, Rang Liu +2
In contrast to conventional RIS, the scattering matrix of a non-reciprocal RIS (NR-RIS) is non-symmetric, leading to differences in the uplink and the downlink components of NR-RIS…
eess.SP2024
Meta-Learning-Driven Adaptive Codebook Design for Near-Field Communications
Mianyi Zhang, Yunlong Cai, Jiaqi Xu +1
Extremely large-scale arrays (XL-arrays) and ultra-high frequencies are two key technologies for sixth-generation (6G) networks, offering higher system capacity and expanded bandwi…