Explanipedia

FedLoDrop: Federated LoRA with Dropout for Generalized LLM Fine-tuning Open

Shuyun Xie, Dingzhu Wen, Changsheng You, Qimei Chen, Mehdi Bennis , et al. · 2025

Fine-tuning (FT) large language models (LLMs) is crucial for adapting general-purpose models to specific tasks, enhancing accuracy and relevance with minimal resources. To further enhance generalization ability while reducing training cost…

UAV-Enabled ISAC Systems with Fluid Antennas Open

Wenchao Liu, Xuhui Zhang, Jinke Ren, Weijie Yuan, Changsheng You , et al. · 2025

Unmanned aerial vehicle (UAV)-enabled integrated sensing and communication (ISAC) is regarded as a key enabler for next-generation wireless systems. However, conventional fixed antenna arrays limit the ability of UAVs to fully exploit thei…

Rotatable Antenna Aided Mixed Near-Field and Far-Field Communications in the Upper Mid-Band: Interference Analysis and Joint Optimization Open

Yunpu Zhang, Changsheng You, Hing Cheung So, Dusit Niyato · 2025

In this paper, we propose to leverage rotatable antennas (RAs) for improving the communication performance in mixed near-field and far-field communication systems by exploiting a new spatial degree-of-freedom (DoF) offered by antenna rotat…

Finite-Precision Conjugate Gradient Method for Massive MIMO Detection Open

Yiming Fang, Li Chen, Changsheng You, Dingzhu Wen, Pengcheng Zhu · 2025

The implementation of the conjugate gradient (CG) method for massive MIMO detection is computationally challenging, especially for a large number of users and correlated channels. In this paper, we propose a low computational complexity CG…

Rotatable Antenna-Enabled Secure Wireless Communication Open

Liang Dai, Beixiong Zheng, Qingjie Wu, Changsheng You, Robert Schober , et al. · 2025

Rotatable antenna (RA) is a promising technology that exploits new spatial degree-of-freedom (DoF) to improve wireless communication and sensing performance. In this letter, we investigate an RA-enabled secure communication system where co…

A Tutorial on Six-Dimensional Movable Antenna for 6G Networks: Synergizing Positionable and Rotatable Antennas Open

Xiaodan Shao, Weidong Mei, Changsheng You, Qingqing Wu, Beixiong Zheng , et al. · 2025

Six-dimensional movable antenna (6DMA) is a new and revolutionary technique that fully exploits the wireless channel spatial variations at the transmitter/receiver by flexibly adjusting the three-dimensional (3D) positions and/or 3D rotati…

Rotatable Antennas for Integrated Sensing and Communications Open

Chao Zhou, Changsheng You, Beixiong Zheng, Xiaodan Shao, Rui Zhang · 2025

In this letter, we propose to deploy rotatable antennas (RAs) at the base station (BS) to enhance both communication and sensing (C&S) performances, by exploiting a new spatial degree-of-freedom (DoF) offered by array rotation. Specificall…

Next Generation Advanced Transceiver Technologies for 6G and Beyond Open

Changsheng You, Yunlong Cai, Yuanwei Liu, Marco Di Renzo, Tolga M. Duman , et al. · 2025

Communication Efficient Cooperative Edge AI via Event-Triggered Computation Offloading Open

You Zhou, Changsheng You, Kaibin Huang · 2025

Rare events, despite their infrequency, often carry critical information and require immediate attentions in mission-critical applications such as autonomous driving, healthcare, and industrial automation. The data-intensive nature of thes…

Federated Dropout: Convergence Analysis and Resource Allocation Open

Shuyun Xie, Dingzhu Wen, Xiaonan Liu, Changsheng You, Tharmalingam Ratnarajah , et al. · 2024

Federated Dropout is an efficient technique to overcome both communication and computation bottlenecks for deploying federated learning at the network edge. In each training round, an edge device only needs to update and transmit a sub-mod…

Near-field Communications with Extremely Large-Scale Uniform Arc Arrays: Channel Modelling and Performance Analysis Open

Guoyu Li, Changsheng You, Guanyu Shang, Shaochuan Wu · 2024

In this letter, we propose a new conformal array architecture, called extremely large-scale uniform arc array (XL-UAA), to improve near-field communication performance. Specifically,under the non-uniform spherical wavefront channel model, …

Two-Timescale Digital Twin Assisted Model Interference and Retraining over Wireless Network Open

Jiayi Cong, Guoliang Cheng, Changsheng You, Xinyu Huang, Wen Wu · 2024

In this paper, we investigate a resource allocation and model retraining problem for dynamic wireless networks by utilizing incremental learning, in which the digital twin (DT) scheme is employed for decision making. A two-timescale framew…

Near-Field Localization With Coprime Array Open

Hongqiang Cheng, Changsheng You, Cong Zhou · 2024

Large-aperture coprime arrays (CAs) are expected to achieve higher sensing resolution than conventional dense arrays (DAs), yet with lower hardware and energy cost. However, existing CA far-field localization methods cannot be directly app…

Two Birds With One Stone: Enhancing Communication and Sensing via Multi-Functional RIS Open

Wanli Ni, Wen Wang, Ailing Zheng, Peng Wang, Changsheng You , et al. · 2024

In this article, we propose new network architectures that integrate multi-functional reconfigurable intelligent surfaces (MF-RISs) into 6G networks to enhance both communication and sensing capabilities. Firstly, we elaborate how to lever…

Near-field Beam-focusing Pattern under Discrete Phase Shifters Open

Haodong Zhang, Changsheng You, Zhou Cong · 2024

Extremely large-scale arrays (XL-arrays) have emerged as a promising technology for enabling near-field communications in future wireless systems. However, the huge number of antennas deployed pose demanding challenges on the hardware cost…

Intelligent Reflecting Surface-Aided Multiuser Communication: Co-design of Transmit Diversity and Active/Passive Precoding Open

Beixiong Zheng, Tiantian Ma, Jie Tang, Changsheng You, Shaoe Lin , et al. · 2024

Intelligent reflecting surface (IRS) has become a cost-effective solution for constructing a smart and adaptive radio environment. Most previous works on IRS have jointly designed the active and passive precoding based on perfectly or part…

Channel Estimation for XL-IRS Assisted Wireless Systems with Double-sided Visibility Regions Open

Chao Zhou, Changsheng You, Shiqi Gong, Bin Lyu, Beixiong Zheng , et al. · 2024

In this paper, we study efficient channel estimation design for an extremely large-scale intelligent reflecting surface (XL-IRS) assisted multi-user communication systems, where both the base station (BS) and users are located in the near-…

Asynchronous Cell-Free Massive MIMO-OFDM: Mixed Coherent and Non-Coherent Transmissions Open

Guoyu Li, Shaochuan Wu, Changsheng You, Wenbin Zhang, Guanyu Shang · 2024

In this letter, we analyze the performance of mixed coherent and non-coherent transmissions approach, which can improve the performance of cell-free multiple-input multiple-output orthogonal frequency division multiplexing (CF mMIMO-OFDM) …

Movable Antenna Enabled Symbiotic Radio Systems: An Opportunity for Mutualism Open

Chao Zhou, Bin Lyu, Changsheng You, Ziwei Liu · 2024

In this letter, we propose a new movable antenna (MA) enabled symbiotic radio (SR) system that leverages the movement of MAs to maximize both the primary and secondary rates, thereby promoting their mutualism. Specifically, the primary tra…

Performance Analysis and Low-Complexity Beamforming Design for Near-Field Physical Layer Security Open

Yunpu Zhang, Yuan Fang, Xianghao Yu, Changsheng You, Ying–Jun Angela Zhang · 2024

Extremely large-scale arrays (XL-arrays) have emerged as a key enabler in achieving the unprecedented performance requirements of future wireless networks, leading to a significant increase in the range of the near-field region. This trans…

Multi-beam Training for Near-field Communications in High-frequency Bands Open

Cong Zhou, Changsheng You, Zixuan Huang, Shuo Shi, Yi Gong , et al. · 2024

In this paper, we study efficient multi-beam training design for near-field communications to reduce the beam training overhead of conventional single-beam training methods. In particular, the array-division based multi-beam training metho…

Near-Field Positioning and Attitude Sensing Based on Electromagnetic Propagation Modeling Open

Ang Chen, Li Chen, Yunfei Chen, Nan Zhao, Changsheng You · 2024

Positioning and sensing over wireless networks are imperative for many emerging applications. However, since traditional wireless channel models oversimplify the user equipment (UE) as a point target, they cannot be used for sensing the at…

Near-field Beam Training with Sparse DFT Codebook Open

Cong Zhou, Chenyu Wu, Changsheng You, Shuo Shi · 2024

Extremely large-scale array (XL-array) has emerged as one promising technology to improve the spectral efficiency and spatial resolution of future sixth generation (6G) wireless systems.The upsurge in the antenna number antennas renders co…

Next Generation Advanced Transceiver Technologies for 6G and Beyond Open

Changsheng You, Yunlong Cai, Yuanwei Liu, Marco Di Renzo, Tolga M. Duman , et al. · 2024

To accommodate new applications such as extended reality, fully autonomous vehicular networks and the metaverse, next generation wireless networks are going to be subject to much more stringent performance requirements than the fifth-gener…

Sparse Array Enabled Near-Field Communications: Beam Pattern Analysis and Hybrid Beamforming Design Open

Cong Zhou, Changsheng You, Haodong Zhang, Li Chen, Shuo Shi · 2024

Extremely large-scale array (XL-array) has emerged as a promising technology to enable near-field communications for achieving enhanced spectrum efficiency and spatial resolution, by drastically increasing the number of antennas. However, …

Intelligent Surfaces Empowered Wireless Network: Recent Advances and The Road to 6G Open

Qingqing Wu, Beixiong Zheng, Changsheng You, Lipeng Zhu, Kaiming Shen , et al. · 2023

Intelligent surfaces (ISs) have emerged as a key technology to empower a wide range of appealing applications for wireless networks, due to their low cost, high energy efficiency, flexibility of deployment and capability of constructing fa…

Wireless Coded Computation With Error Detection Open

Borui Fang, Li Chen, Yunfei Chen, Changsheng You, Xiaohui Chen , et al. · 2023

In wireless networks with distributed computing, the computational performance is limited by stragglers. To mitigate the stragglers’ effect, coded computation is adopted through computational redundancy. Moreover, in wireless transmission,…

Semantic-Relay-Aided Text Transmission: Placement Optimization and Bandwidth Allocation Open

Tianyu Liu, Changsheng You, Zeyang Hu, Chenyu Wu, Yi Gong , et al. · 2023

Semantic communication has emerged as a promising technology to break the Shannon limit by extracting the meaning of source data and sending relevant semantic information only. However, some mobile devices may have limited computation and …

Multiuser Resource Allocation for Semantic-Relay-Aided Text Transmissions Open

Zeyang Hu, Tianyu Liu, Changsheng You, Zhaohui Yang, Mingzhe Chen · 2023

Semantic communication (SemCom) is an emerging technology that extracts useful meaning from data and sends only relevant semantic information. Thus, it has the great potential to improve the spectrum efficiency of conventional wireless sys…

Resource Allocation for RIS-Empowered Wireless Communications: Low-Complexity and Robust Designs Open

Ming Zeng, Wanming Hao, Zhangjie Peng, Zheng Chu, Xingwang Li , et al. · 2023

This article delves into advancements in resource allocation techniques tailored for systems utilizing reconfigurable intelligent surfaces (RIS), with a primary focus on achieving low-complexity and resilient solutions. The investigation o…

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