877 citations · 1.9k across the 86 of their papers we have counts for
19 papers · 1 filter
Pointing-and-Acquisition for Optical Wireless in 6G: From Algorithms to Performance Evaluation
Hyung-Joo Moon, Chan-Byoung Chae, Kai-Kit Wong +1
The increasing demand for wireless communication services has led to the development of non-terrestrial networks, which enables various air and space applications. Free-space optic…
Sparse RF Lens Antenna Array Design for AoA Estimation in Wideband Systems: Placement Optimization and Performance Analysis
Joo-Hyun Jo, Jae-Nam Shim, Chan-Byoung Chae +2
In this paper, we propose a novel architecture for a lens antenna array (LAA) designed to work with a small number of antennas and enable angle-of-arrival (AoA) estimation for adva…
AoA-based Position and Orientation Estimation Using Lens MIMO in Cooperative Vehicle-to-Vehicle Systems
Joo-Hyun Jo, Jae-Nam Shim, Byoungnam +3
Positioning accuracy is a critical requirement for vehicle-to-everything (V2X) use cases. Therefore, this paper derives the theoretical limits of estimation for the position and or…
On the Role of ViT and CNN in Semantic Communications: Analysis and Prototype Validation
Hanju Yoo, Linglong Dai, Songkuk Kim +1
Semantic communications have shown promising advancements by optimizing source and channel coding jointly. However, the dynamics of these systems remain understudied, limiting rese…
Measurement-based Close-in Path Loss Modeling with Diffraction for Rural Long-distance Communications
Jaedon Park, Hong-Bae Jeon, Jungho Cho +1
In this letter, we investigate rural large-scale path loss models based on the measurements in a central area of South Korea (rural area) in spring. In particular, we develop new c…
On Propagation Characteristics of Reconfigurable Surface Wave Platform: Simulation and Experimental Verification
Z. Chu, K. F. Tong, K. K. Wong +2
Reconfigurable intelligent surface (RIS) as a smart reflector is revolutionizing research for next-generation wireless communications. Complementing this is a concept of using RIS…
Free-Space Optical Communications for 6G Wireless Networks: Challenges, Opportunities, and Prototype Validation
Hong-Bae Jeon, Soo-Min Kim, Hyung-Joo Moon +6
Numerous researchers have studied innovations in future sixth-generation (6G) wireless communications. Indeed, a critical issue that has emerged is to contend with society's insati…
Dynamic RF Beam Codebook Reduction for Cost-Efficient mmWave Full-Duplex Systems
Gee Yong Suk, Jongwoo Kwak, Jaeyoung Choi +1
The recent attempts to realize full-duplex (FD) communications in millimeter wave (mmWave) systems have garnered a significant amount of interest for its potential. In this paper,…
Analog Self-Interference Cancellation with Practical RF Components for Full-Duplex Radios
Jong Woo Kwak, Min Soo Sim, In-Woong Kang +3
One of the main obstacles in full-duplex radios is analog-to-digital converter (ADC) saturation on a receiver due to the strong self-interference (SI). To solve this issue, researc…
Demo: Real-Time Semantic Communications with a Vision Transformer
Hanju Yoo, Taehun Jung, Linglong Dai +2
Semantic communications are expected to enable the more effective delivery of meaning rather than a precise transfer of symbols. In this paper, we propose an end-to-end deep neural…
Beam Squint in Ultra-wideband mmWave Systems: RF Lens Array vs. Phase-Shifter-Based Array
Sang-Hyun Park, Byoungnam Kim, Dong Ku Kim +3
In this article, we discuss the potential of radio frequency (RF) lens for ultra-wideband millimeter-wave (mmWave) systems. In terms of the beam squint, we compare the proposed RF…
RF Lens Antenna Array-Based One-Shot Coarse Pointing for Hybrid RF/FSO Communications
Hyung-Joo Moon, Hong-Bae Jeon, Chan-Byoung Chae
Because of its high directivity, free-space optical (FSO) communication offers a number of advantages. It can, however, give rise to major system difficulties concerning alignment…
An Energy-efficient Aerial Backhaul System with Reconfigurable Intelligent Surface
Hong-Bae Jeon, Sung-Ho Park, Jaedon Park +2
In this paper, we propose a novel wireless architecture, mounted on a high-altitude aerial platform, which is enabled by reconfigurable intelligent surface (RIS). By installing RIS…
A Vision of XR-aided Teleoperation System Towards 5G/B5G
Fenghe Hu, Yansha Deng, Hui Zhou +3
Extended Reality (XR)-aided teleoperation has shown its potential in improving operating efficiency in mission-critical, rich-information and complex scenarios. The multi-sensory X…
Full Duplex Integrated Access and Backhaul for 5G NR: Analyses and Prototype Measurements
Gee Yong Suk, Soo-Min Kim, Jongwoo Kwak +3
Integrated access and backhaul (IAB) frameworks for 5G new radio (NR) as a cost-effective alternative to the wired backhaul have been investigated by 3GPP. A promising solution for…
Energy-efficient Deployment of Multiple UAVs Using Ellipse Clustering to Establish Base Stations
Si-Chan Noh, Hong-Bae Jeon, Chan-Byoung Chae
The demand for future wireless communication systems is being satisfied for various circumstances through unmanned aerial vehicles (UAVs), which act as flying base stations (BSs).…
A Comparative Study of Analog/Digital Self-Interference Cancellation for Full Duplex Radios
Jong Woo Kwak, Min Soo Sim, In-Woong Kang +3
Self-interference (SI) is the main obstacle to full-duplex radios. To overcome the SI, researchers have proposed several analog and digital domain self-interference cancellation (S…
Communication System Design and Analysis for Asynchronous Molecular Timing Channels
Nariman Farsad, Yonathan Murin, Weisi Guo +3
Two new asynchronous modulation techniques for molecular timing (MT) channels are proposed. One based on modulating information on the time between two consecutive releases of indi…
RF Lens-Embedded Antenna Array for mmWave MIMO: Design and Performance
Yae Jee Cho, Gee-Yong Suk, Byoungnam Kim +2
The requirement of high data-rate in the fifth generation wireless systems (5G) calls for the ultimate utilization of the wide bandwidth in the mmWave frequency band. Researchers s…