68 citations · 90 across the 18 of their papers we have counts for
22 papers
Strong Gaussian Approximation of Constant Learning Rate SGD: Bias and Trajectory Inference
Joseph Keslin, Wei Biao Wu
This paper develops strong Gaussian approximations (KMT type) for constant learning rate stochastic gradient descent (SGD). We work with heavy tailed noise and assume that the numb…
Joint Beamforming and Phase Shifts Design for RIS-Enabled RSMA-ISAC Systems
Xuejun Cheng, Qian Zhang, Yuhui Jiao +3
This paper investigates the sensing-centric design of reconfigurable intelligent surface (RIS)-enabled rate-splitting multiple access-integrated sensing and communication (RSMA-ISA…
Structured-Sparsity-Aware Joint User Activity Detection and Channel Estimation for OTFS-Based Grant-Free Random Access
Yao Ge, Yirui Luo, Yuhao Chi +4
Grant-free random access (GFRA) is a promising solution for massive machine-type communications (mMTC) in future wireless networks. However, reliable user activity detection and ch…
DRL-Based Antenna Position Optimization For MA-Assisted OTFS System Under Imperfect CSI
Maoyuan Wang, Qian Zhang, Yufei Zhao +4
In this paper, we introduce movable antenna (MA) technology into orthogonal time frequency space (OTFS) systems to enable wavelength-level antenna position optimization under imper…
Two-Stage Coded-Sliding Beam Training and QoS-Constrained Sum-Rate Maximization for SIM-Assisted Wireless Communications
Qian Zhang, Ju Liu, Yao Ge +5
Stacked intelligent metasurfaces (SIM) provide a cost-effective and scalable solution for large-scale antenna communications.However, efficient channel state information acquisitio…
Cramér-Rao Bound Minimization for Flexible Intelligent Metasurface-Enabled ISAC Systems
Qian Zhang, Yufei Zhao, Jiancheng An +4
Integrated sensing and communication (ISAC) have been widely recognized as a key enabler for future wireless networks, where the Cramér-Rao bound (CRB) plays a central role in quan…
Efficient Beamforming for Discrete SIM-Aided Multiuser Systems Under Statistical CSI
Yuhui Jiao, Qian Zhang, Xuejun Cheng +4
Stacked Intelligent Metasurfaces (SIM) have emerged as a revolutionary architecture for next-generation wireless communications, offering wave-domain signal processing capabilities…
Enhanced Information Security via Wave-Field Selectivity and Structured Wavefront Manipulation
Yufei Zhao, Deyu Lin, Qian Zhang +5
In this paper, we propose a novel secure wireless transmission architecture that enables the co-existence of spatial field modulation (SFM) and digital bandpass modulation (DBM), u…
Network-Centric Anomaly Filtering and Spoofer localization for 5G-NR Localization in LAWNs
Zexin Fang, Bin Han, Zhu Han +3
This paper investigates security vulnerabilities and countermeasures for the 3rd Generation Partnership Project (3GPP) Fifth Generation New Radio (5G-NR) Time Difference of Arrival…
Multi-Resolution Codebook Design and Multiuser Interference Management for Discrete XL-RIS-Aided Near-Field MIMO Systems
Qian Zhang, Zheng Dong, Yao Ge +3
Extremely large-scale reconfigurable intelligent surface (XL-RIS) can effectively overcome severe fading and provide higher communication performance. However, current research on…
Introducing Meta-Fiber into Stacked Intelligent Metasurfaces for MIMO Communications: A Low-Complexity Design with only Two Layers
Hong Niu, Jiancheng An, Tuo Wu +8
Stacked intelligent metasurfaces (SIMs), which integrate multiple programmable metasurface layers, have recently emerged as a promising technology for advanced wave-domain signal p…
Focusing Metasurfaces of (Un)equal Power Allocations for Wireless Power Transfer
Andi Ding, Yee Hui Lee, Eng Leong Tan +5
Focusing metasurfaces (MTSs) tailored for different power allocations in wireless power transfer (WPT) system are proposed in this letter. The designed metasurface unit cells ensur…
Compact Varactor-Integrated RIS for Wideband and Continuously Tunable Beamforming
Yikun Li, Yufei Zhao, Chau Yuen +4
This letter presents a novel Reconfigurable Intelligent Surface (RIS) that features a low-profile structure, wide operating bandwidth, and continuous phase control. By incorporatin…
Low-Interference Near-Field Multi-User Communication Enabled by Spatially Converging Multi-Mode Vortex Waves
Yufei Zhao, Qihao Lv, Yuanbin Chen +3
This paper proposes a multi-user Spatial Division Multiplexing (SDM) near-field access scheme, inspired by the orthogonal characteristics of multi-mode vortex waves. A Reconfigurab…
Joint Precoder and Reflector Design for RIS-assisted Multi-user OAM Communication Systems
Xiaoyan Ma, Yufei Zhao, Haixia Zhang +2
Orbital angular momentum (OAM) can enhance the spectral efficiency by multiplying a set of orthogonal modes on the same frequency channel. To maintain the orthogonal among differen…
Harnessing Rydberg Atomic Receivers: From Quantum Physics to Wireless Communications
Yuanbin Chen, Xufeng Guo, Chau Yuen +5
The intrinsic integration of Rydberg atomic receivers into wireless communication systems is proposed, by harnessing the principles of quantum physics in wireless communications. M…
Experimental Study of RCS Diversity with Novel No-divergent OAM Beams
Yufei Zhao, Yong Liang Guan, Dong Chen +4
This research proposes a novel approach utilizing Orbital Angular Momentum (OAM) beams to enhance Radar Cross Section (RCS) diversity for target detection in future transportation…
Rydberg Atomic Quantum Receivers for Classical Wireless Communications and Sensing: Their Models and Performance
Tierui Gong, Jiaming Sun, Chau Yuen +6
The significant progress of quantum sensing technologies offer numerous radical solutions for measuring a multitude of physical quantities at an unprecedented precision. Among them…
Innovative RIS Prototyping Enhancing Wireless Communication with Real-Time Spot Beam Tracking and OAM Wavefront Manipulation
Yufei Zhao, Yuan Feng, Afkar Mohamed Ismail +4
This paper presents a sophisticated reconfigurable metasurface architecture that introduces an advanced concept of flexible full-array space-time wavefront manipulation with enhanc…
Near-Orthogonal Overlay Communications in LoS Channel Enabled by Novel OAM Beams without Central Energy Voids: An Experimental Study
Yufei Zhao, Xiaoyan Ma, Yong Liang Guan +5
This paper introduces a groundbreaking Line-of-Sight (LoS) Multiple-Input Multiple-Output (MIMO) communication architecture leveraging non-traditional Orbital Angular Momentum (OAM…
Efficient Multi-Pair IoT Communication with Holographically Enhanced Meta-Surfaces Leveraging OAM Beams: Bridging Theory and Prototype
Yufei Zhao, Yong Liang Guan, Afkar Mohamed Ismail +4
Meta-surfaces, also known as Reconfigurable Intelligent Surfaces (RIS), have emerged as a cost-effective, low power consumption, and flexible solution for enabling multiple applica…
Multi-mode OAM Convergent Transmission with Co-divergent Angle Tailored by Airy Wavefront
Yufei Zhao, Ziyang Wang, Yilong Lu +1
Wireless backhaul offers a more cost-effective, time-efficient, and reconfigurable solution than wired backhaul to connect the edge-computing cells to the core network. As the amou…