124 citations · 564 across the 28 of their papers we have counts for
28 papers
Sum Secrecy Rate Maximization for IRS-aided Multi-Cluster MIMO-NOMA Terahertz Systems
Jinlei Xu, Zhengyu Zhu, Zheng Chu +3
Intelligent reflecting surface (IRS) is a promising technique to extend the network coverage and improve spectral efficiency. This paper investigates an IRS-assisted terahertz (THz…
Deep Learning for Multi-User MIMO Systems: Joint Design of Pilot, Limited Feedback, and Precoding
Jeonghyeon Jang, Hoon Lee, Il-Min Kim +1
In conventional multi-user multiple-input multiple-output (MU-MIMO) systems with frequency division duplexing (FDD), channel acquisition and precoder optimization processes have be…
A Codebook Design for FD-MIMO Systems with Multi-Panel Array
Zhilin Fu, Sangwon Hwang, Jihwan Moon +2
In this work, we study codebook designs for full-dimension multiple-input multiple-output (FD-MIMO) systems with a multi-panel array (MPA). We propose novel codebooks which allow p…
Decentralized Computation Offloading With Cooperative UAVs: Multi-Agent Deep Reinforcement Learning Perspective
Sangwon Hwang, Hoon Lee, Juseong Park +1
Limited computing resources of internet-of-things (IoT) nodes incur prohibitive latency in processing input data. This triggers new research opportunities toward task offloading sy…
Deep Learning Based Resource Assignment for Wireless Networks
Minseok Kim, Hoon Lee, Hongju Lee +1
This paper studies a deep learning approach for binary assignment problems in wireless networks, which identifies binary variables for permutation matrices. This poses challenges i…
Multi-Agent Deep Reinforcement Learning for Distributed Resource Management in Wirelessly Powered Communication Networks
Sangwon Hwang, Hanjin Kim, Hoon Lee +1
This paper studies multi-agent deep reinforcement learning (MADRL) based resource allocation methods for multi-cell wireless powered communication networks (WPCNs) where multiple h…
Deep Learning-based Limited Feedback Designs for MIMO Systems
Jeonghyeon Jang, Hoon Lee, Sangwon Hwang +2
We study a deep learning (DL) based limited feedback methods for multi-antenna systems. Deep neural networks (DNNs) are introduced to replace an end-to-end limited feedback procedu…
Joint Design of Fronthauling and Hybrid Beamforming for Downlink C-RAN Systems
Jaein Kim, Seok-Hwan Park, Osvaldo Simeone +2
Hybrid beamforming is known to be a cost-effective and wide-spread solution for a system with large-scale antenna arrays. This work studies the optimization of the analog and digit…
Online Reinforcement Learning of X-Haul Content Delivery Mode in Fog Radio Access Networks
Jihwan Moon, Osvaldo Simeone, Seok-Hwan Park +1
We consider a Fog Radio Access Network (F-RAN) with a Base Band Unit (BBU) in the cloud and multiple cache-enabled enhanced Remote Radio Heads (eRRHs). The system aims at deliverin…
Deep Learning Framework for Wireless Systems: Applications to Optical Wireless Communications
Hoon Lee, Sang Hyun Lee, Tony Q. S. Quek +1
Optical wireless communication (OWC) is a promising technology for future wireless communications owing to its potentials for cost-effective network deployment and high data rate.…
Energy Efficiency Maximization in mmWave Wireless Networks with 3D Beamforming
Mahdi Baianifar
In this paper, we address the problem of three dimensional beamforming in millimeter wave (mmWave) wireless networks. In particular, we study the impact of base station (BS) antenn…
AN-aided Secure Transmission in Multi-user MIMO SWIPT Systems
Zhengyu Zhu, Ning Wang, Zheng Chu +2
In this paper, an energy harvesting scheme for a multi-user multiple-input-multiple-output (MIMO) secrecy channel with artificial noise (AN) transmission is investigated. Joint opt…
Energy Harvesting Fairness in AN-aided Secure MU-MIMO SWIPT Systems with Cooperative Jammer
Zhengyu Zhu, Zheng Chu, Ning Wang +2
In this paper, we study a multi-user multiple-input-multiple-output secrecy simultaneous wireless information and power transfer (SWIPT) channel which consists of one transmitter,…
Robust Designs of Beamforming and Power Splitting for Distributed Antenna Systems with Wireless Energy Harvesting
Zhengyu Zhu, Sai Huang, Zheng Chu +3
In this paper, we investigate a multiuser distributed antenna system with simultaneous wireless information and power transmission under the assumption of imperfect channel state i…
UAV-Aided Wireless Communication Designs With Propulsion Energy Limitations
Subin Eom, Hoon Lee, Junhee Park +1
This paper studies unmanned aerial vehicle (UAV) aided wireless communication systems where a UAV supports uplink communications of multiple ground nodes (GNs) while flying over th…
Minimum Throughput Maximization in UAV-Aided Wireless Powered Communication Networks
Junhee Park, Hoon Lee, Subin Eom +1
This paper investigates unmanned aerial vehicle (UAV)-aided wireless powered communication network (WPCN) systems where a mobile access point (AP) at the UAV serves multiple energy…
Joint Design of Digital and Analog Processing for Downlink C-RAN with Large-Scale Antenna Arrays
Jaein Kim, Seok-Hwan Park, Osvaldo Simeone +2
In millimeter-wave communication systems with large-scale antenna arrays, conventional digital beamforming may not be cost-effective. A promising solution is the implementation of…
Energy Efficient Precoding Design for SWIPT in MIMO Two-Way Relay Networks
Javane Rostampoor, S. Mohammad Razavizadeh, Inkyu Lee
In this paper, we study the energy efficiency (EE) maximization problem in multiple-input multiple-output (MIMO) two-way relay networks with simultaneous wireless information and p…
Beamforming and Power Splitting Designs for AN-aided Secure Multi-user MIMO SWIPT Systems
Zhengyu Zhu, Zheng Chu, Ning Wang +3
In this paper, an energy harvesting scheme for a multi-user multiple-input-multiple-output (MIMO) secrecy channel with artificial noise (AN) transmission is investigated. Joint opt…
Characterization of Effective Capacity in Antenna Selection MIMO Systems
Mohammad Lari, Abbas Mohammadi, Abdolali Abdipour +1
In this Paper, the effective capacity of a multiple-input multiple-output (MIMO) system in two different cases with receive antenna selection (RAS) and transmit antenna selection (…
Saturation Power based Simple Energy Efficiency Maximization Schemes for MU-MISO Systems
Jaehoon Jung, Sang-Rim Lee, Inkyu Lee
In this paper, we investigate an energy efficiency (EE) maximization problem in multi-user multiple input single output downlink channels. The optimization problem in this system m…
Resource Allocation Techniques for Wireless Powered Communication Networks with Energy Storage Constraint
Hoon Lee, Kyoung-Jae Lee, Hanjin Kim +2
This paper studies multi-user wireless powered communication networks, where energy constrained users charge their energy storages by scavenging energy of the radio frequency signa…
A New Energy Efficient Beamforming Strategy for MISO Interfering Broadcast Channels based on Large Systems Analysis
Sang-Rim Lee, Jaehoon Jung, Haewook Park +1
In this paper, we propose a new beamforming design to maximize energy efficiency (EE) for multiple input single output interfering broadcast channels (IFBC). Under this model, the…
Joint Subcarrier and Power Allocation Methods in Wireless Powered Communication Network for OFDM systems
Hanjin Kim, Hoon Lee, Minki Ahn +2
In this paper, we investigate wireless powered communication network for OFDM systems, where a hybrid access point (H-AP) broadcasts energy signals to users in the downlink, and th…