20 citations · 22 across the 13 of their papers we have counts for
15 papers · 1 filter
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…
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…