154 citations · 245 across the 12 of their papers we have counts for
12 papers
System-Level Evaluation of LEO Satellite Communications Under Service-Driven Traffic Dynamics
Miyeon Lee, Dong-Hyun Jung, Sucheol Kim +2
As low Earth orbit (LEO) satellite communications take shape on a global scale, system-level evaluation has become essential for a rigorous understanding of their performance chara…
UV-Plane Beam Mapping for Non-Terrestrial Networks in 3GPP System-Level Simulations
Dong-Hyun Jung, Sucheol Kim, Miyeon Lee +2
Due to the high altitudes and large beam sizes of satellites, the curvature of the Earth's surface can impact system-level performance. To consider this, 3GPP introduces the UV-pla…
Analyzing Downlink Coverage in Clustered Low Earth Orbit Satellite Constellations: A Stochastic Geometry Approach
Miyeon Lee, Sucheol Kim, Minje Kim +2
Satellite networks are emerging as vital solutions for global connectivity beyond 5G. As companies such as SpaceX, OneWeb, and Amazon are poised to launch a large number of satelli…
Practical Channel Estimation and Phase Shift Design for Intelligent Reflecting Surface Empowered MIMO Systems
Sucheol Kim, Hyeongtaek Lee, Jihoon Cha +3
In this paper, channel estimation techniques and phase shift design for intelligent reflecting surface (IRS)-empowered single-user multiple-input multiple-output (SU-MIMO) systems…
Complete Power Reallocation for MU-MIMO under Per-Antenna Power Constraint
Sucheol Kim, Hyeongtaek Lee, Hwanjin Kim +2
This paper proposes a beamforming method under a per-antenna power constraint (PAPC). Although many beamformer designs with the PAPC need to solve complex optimization problems, th…
Downlink Channel Reconstruction for Spatial Multiplexing in Massive MIMO Systems
Hyeongtaek Lee, Hyuckjin Choi, Hwanjin Kim +4
To get channel state information (CSI) at a base station (BS), most of researches on massive multiple-input multiple-output (MIMO) systems consider time division duplexing (TDD) to…
Multi-Vehicle Velocity Estimation Using IEEE 802.11ad Waveform
Geonho Han, Sucheol Kim, Junil Choi
Wireless communication systems are to use millimeter-wave (mmWave) spectra, which can enable extra radar functionalities. In this paper, we propose a multi-target velocity estimati…
Polar-Cap Codebook Design for MISO Rician Fading Channels with Limited Feedback
Sung Hyuck Hong, Sucheol Kim, Junil Choi +1
Most of the prior works on designing codebooks for limited feedback systems have not considered the presence of strong line-of-sight (LOS) channel component. This paper proposes th…
Massive MIMO Channel Prediction: Kalman Filtering vs. Machine Learning
Hwanjin Kim, Sucheol Kim, Hyeongtaek Lee +3
This paper focuses on channel prediction techniques for massive multiple-input multiple-output (MIMO) systems. Previous channel predictors are based on theoretical channel models,…
Beam Designs for Millimeter-Wave Backhaul with Dual-Polarized Uniform Planar Arrays
Sucheol Kim, Junil Choi, Jiho Song
This paper proposes hybrid beamforming designs for millimeter-wave (mmWave) multiple-input multiple-output (MIMO) backhaul systems equipped with uniform planar arrays (UPAs) of dua…
Beam Design for Millimeter-Wave Backhaul with Dual-Polarized Uniform Planar Arrays
Sucheol Kim, Junil Choi, Jiho Song
This paper proposes a beamforming design for millimeter-wave (mmWave) backhaul systems with dual-polarization antennas in uniform planar arrays (UPAs). The proposed design method o…
Efficient Channel AoD/AoA Estimation Using Widebeams for Millimeter Wave MIMO Systems
Hyeongtaek Lee, Sucheol Kim, Junil Choi
Using millimeter-wave (mmWave) bands is expected to provide high data rates through large licensed and unlicensed spectrum. Due to large path loss and sparse scattering propagation…