20 citations · 22 across the 13 of their papers we have counts for
17 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…
RIS-Assisted Multiuser NOMA Networks With Imperfect CSI Under Transceiver Hardware Impairments
Qian Zhang, Maoyuan Wang, Xuejun Cheng +3
The incorporation of non-orthogonal multiple access (NOMA) and reconfigurable intelligent surface (RIS) provides a new solution to improve spectral efficiency. Unfortunately, the c…
Hierarchical Beam Training and Codebook Design for Movable Antenna-Assisted Near-Field Systems
Meihui Liu, Qian Zhang, Xuejun Cheng +3
As sixth-generation (6G) communication systems evolve toward higher frequency bands and larger array apertures, the near-field range expands rapidly, making near-field channel esti…
Joint Power Allocation and Phase-Shift Design for Beyond-Diagonal Stacked Intelligent Metasurfaces-Aided ISAC Systems
Yuhui Jiao, Qian Zhang, Xuejun Cheng +3
Stacked intelligent metasurfaces (SIM) provide an efficient architecture for integrated sensing and communication (ISAC) with few radio-frequency (RF) chains. However, diagonal SIM…
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…
DRL-Based Joint Beamforming and Surface Shape Optimization for Flexible Intelligent Metasurface-Aided ISAC Systems
Maoyuan Wang, Qian Zhang, Jiancheng An +3
Integrated sensing and communication (ISAC) unifies high-precision sensing and wireless data transmission. In this paper, we investigate the design of ISAC systems enabled by flexi…
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…
Robust Beamforming for Practical RIS-Aided RSMA Systems with Imperfect SIC under Transceiver Hardware Impairments
Xuejun Cheng, Qian Zhang, Yunnuo Xu +3
Reconfigurable intelligent surface (RIS)-aided rate-splitting multiple access (RSMA) systems have demonstrated remarkable potential in enhancing spectral efficiency. However, most…
Joint Precoding and Phase-Shift Optimization for Beyond-Diagonal RIS-Aided ISAC System
Xuejun Cheng, Qian Zhang, Yuhui Jiao +4
Beyond diagonal reconfigurable intelligent surfaces (BD-RIS) can realize the interconnection between reflecting elements through the impedance network, thereby providing a new appr…
Beamforming Optimization for Extremely Large-Scale RIS-Aided Near-Field Secure Communications
Xiaotong Xu, Qian Zhang, Yunxiao Li +3
This paper studies an extremely large-scale reconfigurable intelligent surface (XL-RIS)-aided near-field physical layer security (PLS) communication system, aiming to maximize the…
Optimality Analysis of RSMA Degenerating to SDMA Under Imperfect SIC
Xuejun Cheng, Qian Zhang, Yunnuo Xu +3
This document serves as supplementary material for our journal submission, providing detailed mathematical proofs and derivations that support the results presented in the main man…
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…
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…
An Efficient Sum-Rate Maximization Algorithm for Fluid Antenna-Assisted ISAC System
Qian Zhang, Mingjie Shao, Tong Zhang +3
This letter investigates a fluid antenna (FA)-assisted integrated sensing and communication (ISAC) system, with joint antenna position optimization and waveform design. We consider…