28 citations · 284 across the 67 of their papers we have counts for
24 papers · 1 filter
Reconfigurable Holographic Surface: A New Paradigm for Ultra-Massive MIMO
Boya Di, Hongliang Zhang, Rui Zhang +2
Evolving from massive multiple-input multiple-output (MIMO) in current 5G communications, ultra-massive MIMO emerges as a seminal technology for fulfilling more stringent requireme…
Intelligent Surfaces Empowered Wireless Network: Recent Advances and The Road to 6G
Qingqing Wu, Beixiong Zheng, Changsheng You +11
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,…
Deep Reinforcement Learning for Interference Management in UAV-based 3D Networks: Potentials and Challenges
Mojtaba Vaezi, Xingqin Lin, Hongliang Zhang +2
Modern cellular networks are multi-cell and use universal frequency reuse to maximize spectral efficiency. This results in high inter-cell interference. This problem is growing as…
Illegal Intelligent Reflecting Surface Based Active Channel Aging: When Jammer Can Attack Without Power and CSI
Huan Huang, Ying Zhang, Hongliang Zhang +2
Illegal intelligent reflecting surfaces (I-IRSs), i.e., the illegal deployment and utilization of IRSs, impose serious harmful impacts on wireless networks. The existing I-IRS-base…
Technology Trends for Massive MIMO towards 6G
Yiming Huo, Xingqin Lin, Boya Di +6
At the dawn of the next-generation wireless systems and networks, massive multiple-input multiple-output (MIMO) has been envisioned as one of the enabling technologies. With the co…
Intelligent Omni-Surfaces: Simultaneous Refraction and Reflection for Full-dimensional Wireless Communications
Hongliang Zhang, Boya Di
The development of metasurfaces has unlocked various use cases in wireless communication networks to improve performance by manipulating the propagation environment. Intelligent om…
Intelligent Omni-Surfaces: Reflection-Refraction Circuit Model, Full-Dimensional Beamforming, and System Implementation
Shuhao Zeng, Hongliang Zhang, Boya Di +5
The intelligent omni-surface (IOS) is a dynamic metasurface that has recently been proposed to achieve full-dimensional communications by realizing the dual function of anomalous r…
Reconfigurable Refractive Surfaces: An Energy-Efficient Way to Holographic MIMO
Shuhao Zeng, Hongliang Zhang, Boya Di +3
Holographic Multiple Input Multiple Output (HMIMO), which integrates massive antenna elements into a compact space to achieve a spatially continuous aperture, plays an important ro…
Energy-Constrained Computation Offloading in Space-Air-Ground Integrated Networks using Distributionally Robust Optimization
Yali Chen, Bo Ai, Yong Niu +2
With the rapid development of connecting massive devices to the Internet, especially for remote areas without cellular network infrastructures, space-air-ground integrated networks…
Towards Ubiquitous Sensing and Localization With Reconfigurable Intelligent Surfaces
Hongliang Zhang, Boya Di, Kaigui Bian +3
In future cellular systems, wireless localization and sensing functions will be built-in for specific applications, e.g., navigation, transportation, and healthcare, and to support…
Trajectory Optimization and Resource Allocation for OFDMA UAV Relay Networks
Shuhao Zeng, Hongliang Zhang, Boya Di +1
In this paper, we consider a single-cell multi-user orthogonal frequency division multiple access (OFDMA) network with one unmanned aerial vehicle (UAV), which works as an amplify-…
Intelligent Omni-Surfaces for Full-Dimensional Wireless Communications: Principle, Technology, and Implementation
Hongliang Zhang, Shuhao Zeng, Boya Di +6
The recent development of metasurfaces has motivated their potential use for improving the performance of wireless communication networks by manipulating the propagation environmen…
Spatial Equalization Before Reception: Reconfigurable Intelligent Surfaces for Multi-path Mitigation
Hongliang Zhang, Lingyang Song, Zhu Han +1
Reconfigurable intelligent surfaces (RISs), which enable tunable anomalous reflection, have appeared as a promising method to enhance wireless systems. In this paper, we propose to…
Reconfigurable Intelligent Surfaces in 6G: Reflective, Transmissive, or Both?
Shuhao Zeng, Hongliang Zhang, Boya Di +4
Reconfigurable intelligent surfaces (RISs) have attracted wide interest from industry and academia since they can shape the wireless environment into a desirable form with a low co…
Reconfigurable Intelligent Surface assisted Multi-user Communications: How Many Reflective Elements Do We Need?
Hongliang Zhang, Boya Di, Zhu Han +2
Reconfigurable intelligent surfaces (RISs) consisting of multiple reflective elements are a promising technique to enhance communication quality as they can create favorable propag…
Beyond Cell-free MIMO: Energy Efficient Reconfigurable Intelligent Surface Aided Cell-free MIMO Communications
Yutong Zhang, Boya Di, Hongliang Zhang +3
Cell-free systems can effectively eliminate the inter-cell interference by enabling multiple base stations (BSs) to cooperatively serve users without cell boundaries at the expense…
Reconfigurable Intelligent Surface (RIS) Assisted Wireless Coverage Extension: RIS Orientation and Location Optimization
Shuhao Zeng, Hongliang Zhang, Boya Di +2
Recently, reconfigurable intelligent surfaces (RIS) have attracted a lot of attention due to their capability of extending cell coverage by reflecting signals toward the receiver.…
Reconfigurable Intelligent Surface Assisted Device-to-Device Communications
Yali Chen, Bo Ai, Hongliang Zhang +4
With the evolution of the 5G, 6G and beyond, device-to-device (D2D) communication has been developed as an energy-, and spectrum-efficient solution. In cellular network, D2D links…
Reconfigurable Intelligent Surfaces assisted Communications with Limited Phase Shifts: How Many Phase Shifts Are Enough?
Hongliang Zhang, Boya Di, Lingyang Song +1
Reconfigurable intelligent surface~(RIS) has drawn a great attention worldwide as it can create favorable propagation conditions by controlling the phase shifts of the reflected si…
Hybrid Beamforming for Reconfigurable Intelligent Surface based Multi-user Communications: Achievable Rates with Limited Discrete Phase Shifts
Boya Di, Hongliang Zhang, Lingyang Song +3
Reconfigurable intelligent surface (RIS) has drawn considerable attention from the research society recently, which creates favorable propagation conditions by controlling the phas…
Cooperation Techniques for A Cellular Internet of Unmanned Aerial Vehicles
Hongliang Zhang, Lingyang Song, Zhu Han +1
Unmanned aerial vehicles (UAVs) are powerful Internet-of-Things components to provide sensing and communications in the air due to their advantages in mobility and flexibility. As…
IoT-U: Cellular Internet-of-Things Networks over Unlicensed Spectrum
Hongliang Zhang, Boya Di, Kaigui Bian +1
In this paper, we consider an uplink cellular Internet-of-Things (IoT) network, where a cellular user (CU) can serve as the mobile data aggregator for a cluster of IoT devices. To…
Load Balancing for 5G Ultra-Dense Networks using Device-to-Device Communications
Hongliang Zhang, Lingyang Song, Ying Jun +1
Load balancing is an effective approach to address the spatial-temporal fluctuation problem of mobile data traffic for cellular networks. The existing schemes that focus on channel…
Hypergraph Theory: Applications in 5G Heterogeneous Ultra-Dense Networks
Hongliang Zhang, Lingyang Song, Yonghui Li +1
Heterogeneous ultra-dense network (HUDN) can significantly increase the spectral efficiency of cellular networks and cater for the explosive growth of data traffic in the fifth-gen…