1.1k citations · 1.9k across the 18 of their papers we have counts for
18 papers
High-Efficiency Urban 3D Radio Map Estimation Based on Sparse Measurements
Xinwei Chen, Xiaofeng Zhong, Zijian Zhang +2
Recent widespread applications for unmanned aerial vehicles (UAVs) -- from infrastructure inspection to urban logistics -- have prompted an urgent need for high-accuracy three-dime…
Ice-Filling: Near-Optimal Channel Estimation for Dense Array Systems
Mingyao Cui, Zijian Zhang, Linglong Dai +1
By deploying a large number of antennas with sub-half-wavelength spacing in a compact space, dense array systems (DASs) can fully unleash the multiplexing and diversity gains of li…
Successive Bayesian Reconstructor for FAS Channel Estimation
Zijian Zhang, Jieao Zhu, Linglong Dai +1
Fluid antenna systems (FASs) can reconfigure their locations freely within a spatially continuous space. To keep favorable antenna positions, the channel state information (CSI) ac…
Successive Bayesian Reconstructor for Channel Estimation in Fluid Antenna Systems
Zijian Zhang, Jieao Zhu, Linglong Dai +1
Fluid antenna systems (FASs) can reconfigure their antenna locations freely within a spatially continuous space. To keep favorable antenna positions, the channel state information…
Reconfigurable Intelligent Surfaces for 6G: Nine Fundamental Issues and One Critical Problem
Zijian Zhang, Linglong Dai
Thanks to the recent advances in metamaterials, reconfigurable intelligent surface (RIS) has emerged as a promising technology for future 6G wireless communications. Benefiting fro…
Active RISs: Signal Modeling, Asymptotic Analysis, and Beamforming Design
Zijian Zhang, Linglong Dai, Xibi Chen +4
Reconfigurable intelligent surfaces (RISs) have emerged as a candidate technology for future 6G networks. However, due to the "multiplicative fading" effect, the existing passive R…
Hierarchical Beam Training for Extremely Large-Scale MIMO: From Far-Field to Near-Field
Yu Lu, Zijian Zhang, Linglong Dai
Extremely large-scale MIMO (XL-MIMO) is a promising technique for future 6G communications. The sharp increase in the number of antennas causes electromagnetic propagation to chang…
On Finite-Time Mutual Information
Jieao Zhu, Zijian Zhang, Zhongzhichao Wan +1
Shannon-Hartley theorem can accurately calculate the channel capacity when the signal observation time is infinite. However, the calculation of finite-time mutual information, whic…
Pattern-Division Multiplexing for Continuous-Aperture MIMO
Zijian Zhang, Linglong Dai
In recent years, continuous-aperture multiple-input multiple-output (CAP-MIMO) is reinvestigated to achieve improved communication performance with limited antenna apertures. Unlik…
Finite-Time Capacity: Making Exceed-Shannon Possible?
Jieao Zhu, Zijian Zhang, Zhongzhichao Wan +1
Shannon-Hartley theorem can accurately calculate the channel capacity when the signal observation time is infinite. However, the calculation of finite-time capacity, which remains…
Distance-Aware Precoding for Near-Field Capacity Improvement
Zidong Wu, Mingyao Cui, Zijian Zhang +1
Extremely large-scale MIMO (XL-MIMO) is a promising technology to improve the capacity for future 6G networks. With a very large number of antennas, the near-field property of XL-M…
Pattern-Division Multiplexing for Multi-User Continuous-Aperture MIMO
Zijian Zhang, Linglong Dai
In recent years, thanks to the advances in meta-materials, the concept of continuous-aperture MIMO (CAP-MIMO) is reinvestigated to achieve improved communication performance with l…
Mutual Information for Electromagnetic Information Theory Based on Random Fields
Zhongzhichao Wan, Jieao Zhu, Zijian Zhang +2
Traditional channel capacity based on the discrete spatial dimensions mismatches the continuous electromagnetic fields. For the wireless communication system in a limited region, t…
Compact User-Specific Reconfigurable Intelligent Surfaces for Uplink Transmission
Kunzan Liu, Zijian Zhang, Linglong Dai +1
Large-scale antenna arrays employed by the base station (BS) constitute an essential next-generation communications technique. However, due to the constraints of size, cost, and po…
Active RIS vs. Passive RIS: Which Will Prevail in 6G?
Zijian Zhang, Linglong Dai, Xibi Chen +4
As a revolutionary paradigm for controlling wireless channels, reconfigurable intelligent surfaces (RISs) have emerged as a candidate technology for future 6G networks. However, du…
Capacity Improvement in Wideband Reconfigurable Intelligent Surface-Aided Cell-Free Network
Zijian Zhang, Linglong Dai
Thanks to the strong ability against the inter-cell interference, cell-free network has been considered as a promising technique to improve the network capacity of future wireless…
A joint precoding framework for wideband reconfigurable intelligent surface-aided cell-free network
Zijian Zhang, Linglong Dai
Thanks to the strong ability against the inter-cell interference, cell-free network is considered as a promising technique to improve network capacity. However, further capacity im…
Analysis and Optimization of Outage Probability in Multi-Intelligent Reflecting Surface-Assisted Systems
Zijian Zhang, Ying Cui, Feng Yang +1
Intelligent reflecting surface (IRS) is envisioned to be a promising solution for designing spectral and energy efficient wireless systems. In this letter, we study a multi-IRS-ass…