Search Results for author: JungHoon Kim

Found 17 papers, 2 papers with code

Beam Training in mmWave Vehicular Systems: Machine Learning for Decoupling Beam Selection

no code implementations16 Apr 2024 Ibrahim Kilinc, Ryan M. Dreifuerst, JungHoon Kim, Robert W. Heath Jr

Codebook-based beam selection is one approach for configuring millimeter wave communication links.

Coding for Gaussian Two-Way Channels: Linear and Learning-Based Approaches

no code implementations31 Dec 2023 JungHoon Kim, Taejoon Kim, Anindya Bijoy Das, Seyyedali Hosseinalipour, David J. Love, Christopher G. Brinton

In this work, we aim to enhance and balance the communication reliability in GTWCs by minimizing the sum of error probabilities via joint design of encoders and decoders at the users.

Class Label-aware Graph Anomaly Detection

1 code implementation22 Aug 2023 JungHoon Kim, Yeonjun In, Kanghoon Yoon, Junmo Lee, Chanyoung Park

Unsupervised GAD methods assume the lack of anomaly labels, i. e., whether a node is anomalous or not.

Graph Anomaly Detection Node Classification

Label-based Graph Augmentation with Metapath for Graph Anomaly Detection

2 code implementations21 Aug 2023 Hwan Kim, JungHoon Kim, Byung Suk Lee, Sungsu Lim

To further efficiently exploit context information from metapath-based anomaly subgraph, we present a new framework, Metapath-based Graph Anomaly Detection (MGAD), incorporating GCN layers in both the dual-encoders and decoders to efficiently propagate context information between abnormal and normal nodes.

Graph Anomaly Detection Semi-supervised Anomaly Detection +1

Rate-Splitting Multiple Access: The First Prototype and Experimental Validation of its Superiority over SDMA and NOMA

no code implementations12 May 2023 Xinze Lyu, Sundar Aditya, JungHoon Kim, Bruno Clerckx

In multi-user multi-antenna communications, it is well-known in theory that Rate-Splitting Multiple Access (RSMA) can achieve a higher spectral efficiency than both Space Division Multiple Access (SDMA) and Non-Orthogonal Multiple Access (NOMA).

Fairness

Robust Non-Linear Feedback Coding via Power-Constrained Deep Learning

no code implementations25 Apr 2023 JungHoon Kim, Taejoon Kim, David Love, Christopher Brinton

The design of codes for feedback-enabled communications has been a long-standing open problem.

Learning-Based Adaptive User Selection in Millimeter Wave Hybrid Beamforming Systems

no code implementations16 Feb 2023 JungHoon Kim, Matthew Andrews

We consider a multi-user hybrid beamforming system, where the multiplexing gain is limited by the small number of RF chains employed at the base station (BS).

Scheduling

Deep Reinforcement Learning-Based Adaptive IRS Control with Limited Feedback Codebooks

no code implementations7 May 2022 JungHoon Kim, Seyyedali Hosseinalipour, Andrew C. Marcum, Taejoon Kim, David J. Love, Christopher G. Brinton

Intelligent reflecting surfaces (IRS) consist of configurable meta-atoms, which can alter the wireless propagation environment through design of their reflection coefficients.

reinforcement-learning Reinforcement Learning (RL)

No Task Left Behind: Multi-Task Learning of Knowledge Tracing and Option Tracing for Better Student Assessment

no code implementations8 Apr 2022 Suyeong An, JungHoon Kim, Minsam Kim, Juneyoung Park

One of the most common approach to student assessment is Knowledge Tracing (KT), which evaluates a student's knowledge state by predicting whether the student will answer a given question correctly or not.

Knowledge Tracing Multiple-choice +1

Learning-Based Adaptive IRS Control with Limited Feedback Codebooks

no code implementations3 Dec 2021 JungHoon Kim, Seyyedali Hosseinalipour, Andrew C. Marcum, Taejoon Kim, David J. Love, Christopher G. Brinton

We consider a practical setting where (i) the IRS reflection coefficients are achieved by adjusting tunable elements embedded in the meta-atoms, (ii) the IRS reflection coefficients are affected by the incident angles of the incoming signals, (iii) the IRS is deployed in multi-path, time-varying channels, and (iv) the feedback link from the base station to the IRS has a low data rate.

Closed-Loop Wireless Power Transfer with Adaptive Waveform and Beamforming: Design, Prototype, and Experiment

no code implementations7 Jun 2021 Shanpu Shen, JungHoon Kim, Bruno Clerckx

The transmitter sweeps through the codebook and then the receiver feeds back the index of the optimal codeword, so that the waveform and beamforming can be adapted to the multipath fading channel to maximize the output dc power without requiring explicit channel estimation and the knowledge of accurate Channel State Information.

Wireless Power Transfer with Distributed Antennas: System Design, Prototype, and Experiments

no code implementations31 Oct 2020 Shanpu Shen, JungHoon Kim, Chaoyun Song, Bruno Clerckx

The measurements show that WPT DAS can boost the output dc power by up to 30 dB in single-user case and boost the sum of output dc power by up to 21. 8 dB in two-user case and broaden the service coverage area in a low cost, low complexity, and flexible manner.

Range Expansion for Wireless Power Transfer using Joint Beamforming and Waveform Architecture: An Experimental Study in Indoor Environment

no code implementations4 Oct 2020 JungHoon Kim, Bruno Clerckx

Far-field Wireless Power Transfer (WPT) has emerged as a potential power source for the Internet of Things (IoT) and Wireless Sensor Network (WSN). The expansion of the power transfer range is one of the key challenges to make the technology viable.

Information Theory Information Theory

Minimum Overhead Beamforming and Resource Allocation in D2D Edge Networks

no code implementations25 Jul 2020 JungHoon Kim, Taejoon Kim, Morteza Hashemi, Christopher G. Brinton, David J. Love

Device-to-device (D2D) communications is expected to be a critical enabler of distributed computing in edge networks at scale.

Distributed Computing Management

Prescribing Deep Attentive Score Prediction Attracts Improved Student Engagement

no code implementations27 Apr 2020 Youngnam Lee, Byung-soo Kim, Dongmin Shin, JungHoon Kim, Jineon Baek, Jinhwan Lee, Youngduck Choi

To that end, we apply a state-of-the-art deep attentive neural network-based score prediction model to Santa, a multi-platform English ITS with approximately 780K users in South Korea that exclusively focuses on the TOEIC (Test of English for International Communications) standardized examinations.

Collaborative Filtering

Joint Optimization of Signal Design and Resource Allocation in Wireless D2D Edge Computing

no code implementations27 Feb 2020 JungHoon Kim, Taejoon Kim, Morteza Hashemi, Christopher G. Brinton, David J. Love

In this paper, unlike previous mobile edge computing (MEC) approaches, we propose a joint optimization of wireless MIMO signal design and network resource allocation to maximize energy efficiency.

Networking and Internet Architecture Signal Processing

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