176 citations · 267 across the 18 of their papers we have counts for
18 papers
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…
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…
Secure Transmission for Hierarchical Information Accessibility in Downlink MU-MIMO
Kanguk Lee, Jinseok Choi, Dong Ku Kim +1
Physical layer security is a useful tool to prevent confidential information from wiretapping. In this paper, we consider a generalized model of conventional physical layer securit…
Ultrareliable and Low-Latency Communication Techniques for Tactile Internet Services
Kwang Soon Kim, Dong Ku Kim, Chan-Byoung Chae +9
This paper presents novel ultrareliable and low-latency communication (URLLC) techniques for URLLC services, such as Tactile Internet services. Among typical use-cases of URLLC ser…
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…
Cramer-Rao Lower Bound for DoA Estimation with RF Lens-Embedded Antenna Array
Jae-Nam Shim, Hongseok Park, GeeYong Suk +2
In this paper, we consider the Cramer-Rao lower bound (CRLB) for estimation of a lens-embedded antenna array with deterministic parameters. Unlike CRLB of uniform linear array (ULA…
Compact Full Duplex MIMO Radios in D2D Underlaid Cellular Networks: From System Design to Prototype Results
MinKeun Chung, Min Soo Sim, Dong Ku Kim +1
This paper considers the implementation and application possibilities of a compact full duplex multiple-input multiple-output (MIMO) architecture where direct communication exists…
Nonlinear Self-Interference Cancellation for Full-Duplex Radios: From Link- and System-Level Performance Perspectives
Min Soo Sim, MinKeun Chung, Dongkyu Kim +3
One of the promising technologies for LTE Evolution is full-duplex radio, an innovation is expected to double the spectral efficiency. To realize full-duplex in practice, the main…
Degrees of Freedom of Full-Duplex Cellular Networks with Reconfigurable Antennas at Base Station
Minho Yang, Sang-Woon Jeon, Dong Ku Kim
Full-duplex (FD) cellular networks are considered in which a FD base station (BS) simultaneously supports a set of half-duplex (HD) downlink (DL) users and a set of HD uplink (UL)…
A Desired PAR-Achieving Precoder Design for Multi-User MIMO OFDM based on Concentration of Measure
Hyun-Su Cha, Dong Ku Kim
For multi-user multiple-input and multiple-output (MIMO) wireless communications in orthogonal frequency di- vision multiplexing systems, we propose a MIMO precoding scheme providi…
Smart Small Cell with Hybrid Beamforming for 5G: Theoretical Feasibility and Prototype Results
Jinyoung Jang, MinKeun Chung, Hae Gwang Hwang +8
In this article, we present a real-time three dimensional (3D) hybrid beamforming for fifth generation (5G) wireless networks. One of the key concepts in 5G cellular systems is the…
Prototyping Real-Time Full Duplex Radios
MinKeun Chung, Min Soo Sim, Jaeweon Kim +2
In this article, we present a real-time full duplex radio system for 5G wireless networks. Full duplex radios are capable of opening new possibilities in contexts of high traffic d…
The Feasibility of Interference Alignment for Reverse TDD Systems in MIMO Cellular Networks
Kiyeon Kim, Sang-Woon Jeon, Janghoon Yang +1
The feasibility conditions of interference alignment (IA) are analyzed for reverse TDD systems, i.e., one cell operates as downlink (DL) but the other cell operates as uplink (UL).…
Linear Degrees of Freedom of MIMO Broadcast Channels with Reconfigurable Antennas in the Absence of CSIT
Minho Yang, Sang-Woon Jeon, Dong Ku Kim
The K-user multiple-input and multiple-output (MIMO) broadcast channel (BC) with no channel state information at the transmitter (CSIT) is considered, where each receiver is assume…
Generalized Distributed Compressive Sensing
Jeonghun Park, Seunggye Hwang, Janghoon Yang +1
Distributed Compressive Sensing (DCS) improves the signal recovery performance of multi signal ensembles by exploiting both intra- and inter-signal correlation and sparsity structu…
Feedback-Topology Designs for Interference Alignment in MIMO Interference Channels
Sungyoon Cho, Kaibin Huang, Dongku Kim +4
Interference alignment (IA) is a joint-transmission technique that achieves the capacity of the interference channel for high signal-to-noise ratios (SNRs). Most prior work on IA i…
An Approximation of the Outage Probability for Multi-hop AF Fixed Gain Relay
Jun Kyoung Lee, Janghoon Yang, Dong Ku Kim
In this letter, we present a closed-form approximation of the outage probability for the multi-hop amplify-and-forward (AF) relaying systems with fixed gain in Rayleigh fading chan…