H
Hongliang Zhang
Researcher at Princeton University
Publications - 153
Citations - 5734
Hongliang Zhang is an academic researcher from Princeton University. The author has contributed to research in topics: Cellular network & Wireless. The author has an hindex of 27, co-authored 152 publications receiving 2586 citations. Previous affiliations of Hongliang Zhang include University of Houston & Peking University.
Papers
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Journal ArticleDOI
Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities
Mohamed A. ElMossallamy,Hongliang Zhang,Lingyang Song,Karim G. Seddik,Zhu Han,Geoffrey Ye Li +5 more
TL;DR: This article describes the working principles of reconfigurable intelligent surfaces (RIS) and elaborate on different candidate implementations using metasurfaces and reflectarrays, and discusses the channel models suitable for both implementations and the feasibility of obtaining accurate channel estimates.
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Hybrid Beamforming for Reconfigurable Intelligent Surface based Multi-User Communications: Achievable Rates With Limited Discrete Phase Shifts
TL;DR: Both theoretical analysis and numerical validations show that the RIS-based system can achieve good sum-rate performance by setting a reasonable size of the RIS and a small number of discrete phase shifts.
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Joint Trajectory and Power Optimization for UAV Relay Networks
TL;DR: A closed-form low-complexity solution with joint trajectory design and power control is proposed to solve the outage probability of an unmanned aerial vehicle (UAV) relay network, where the UAV works as an amplify-and-forward relay.
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Cellular UAV-to-X Communications: Design and Optimization for Multi-UAV Networks
TL;DR: This paper proposes a cooperative UAV sense-and-send protocol to enable the UAV-to-X communications, and forms the subchannel allocation and UAV speed optimization problem to maximize the uplink sum-rate and shows that the proposed ISASOA can upload 10% more data than the greedy algorithm.
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Reconfigurable Intelligent Surfaces Assisted Communications With Limited Phase Shifts: How Many Phase Shifts Are Enough?
TL;DR: In this article, the authors evaluate the performance of an uplink RIS assisted communication system by giving an approximation of the achievable data rate, and investigate the effect of limited phase shifts on the data rate.