no code implementations • 16 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.
no code implementations • 31 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.
1 code implementation • 22 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.
2 code implementations • 21 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
no code implementations • 12 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).
no code implementations • 25 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.
no code implementations • 16 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).
no code implementations • 7 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.
no code implementations • 8 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.
no code implementations • 3 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.
no code implementations • 7 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.
no code implementations • 2 Nov 2020 • JungHoon Kim, Seyyedali Hosseinalipour, Taejoon Kim, David J. Love, Christopher G. Brinton
Applications of intelligent reflecting surfaces (IRSs) in wireless networks have attracted significant attention recently.
no code implementations • 31 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.
no code implementations • 4 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
no code implementations • 25 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.
no code implementations • 27 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.
no code implementations • 27 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