469 citations · 2.4k across the 123 of their papers we have counts for
46 papers · 1 filter
RIS-based IMT-2030 Testbed for MmWave Multi-stream Ultra-massive MIMO Communications
Shuhao Zeng, Boya Di, Hongliang Zhang +13
As one enabling technique of the future sixth generation (6G) network, ultra-massive multiple-input-multiple-output (MIMO) can support high-speed data transmissions and cell covera…
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…
Reconfigurable MIMO towards Electro-magnetic Information Theory: Capacity Maximization Pattern Design
Haonan Wang, Ang Li, Ya-feng Liu +3
In this paper, we focus on the pattern reconfigurable multiple-input multiple-output (PR-MIMO), a technique that has the potential to bridge the gap between electro-magnetics and c…
Achievable Rate Maximization Pattern Design for Reconfigurable MIMO Antenna Array
Haonan Wang, Ang Li, Ya-Feng Liu +3
Reconfigurable multiple-input multiple-output can provide performance gains over traditional MIMO by reshaping the channels, i.e., introducing more channel realizations. In this pa…
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…
STAR-IOS Aided NOMA Networks: Channel Model Approximation and Performance Analysis
Chao Zhang, Wenqiang Yi, Yuanwei Liu +2
Simultaneous transmitting and reflecting intelligent omini-surfaces (STAR-IOSs) are able to achieve full coverage "smart radio environments". By splitting the energy or altering th…
Joint Design for Simultaneously Transmitting And Reflecting (STAR) RIS Assisted NOMA Systems
Jiakuo Zuo, Yuanwei Liu, Zhiguo Ding +2
Different from traditional reflection-only reconfigurable intelligent surfaces (RISs), simultaneously transmitting and reflecting RISs (STAR-RISs) represent a novel technology, whi…
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…
Reconfigurable Intelligent Surface Enhanced NOMA Assisted Backscatter Communication System
Jiakuo Zuo, Yuanwei Liu, Liang Yang +2
A reconfigurable intelligent surface (RIS) enhanced non-orthogonal multiple access assisted backscatter communication (RIS-NOMABC) system is considered. A joint optimization proble…
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…
TCM-NOMA: Joint Multi-user Codeword Design and Detection in Trellis Coded Modulation based NOMA for Beyond 5G
Boya Di, Lingyang Song, Yonghui Li +1
In this paper, we propose a novel non-orthogonal multiple access (NOMA) scheme based on trellis-coded modulation (TCM). Different from those in the traditional code-domain NOMA, th…
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…
Short-Packet Two-Way Amplify-and-Forward Relaying
Yifan Gu, He Chen, Yonghui Li +2
This letter investigates an amplify-and-forward two-way relay network (TWRN) for short-packet communications. We consider a classical three-node TWRN consisting of two sources and…