Search Results for author: Ju-Hyung Lee

Found 9 papers, 2 papers with code

A Scalable and Generalizable Pathloss Map Prediction

1 code implementation6 Dec 2023 Ju-Hyung Lee, Andreas F. Molisch

Large-scale channel prediction, i. e., estimation of the pathloss from geographical/morphological/building maps, is an essential component of wireless network planning.

Transfer Learning

Integrating Pre-Trained Language Model with Physical Layer Communications

1 code implementation18 Feb 2024 Ju-Hyung Lee, Dong-Ho Lee, Joohan Lee, Jay Pujara

The burgeoning field of on-device AI communication, where devices exchange information directly through embedded foundation models, such as language models (LMs), requires robust, efficient, and generalizable communication frameworks.

Language Modelling

Integrating LEO Satellites and Multi-UAV Reinforcement Learning for Hybrid FSO/RF Non-Terrestrial Networks

no code implementations20 Oct 2020 Ju-Hyung Lee, Jihong Park, Mehdi Bennis, Young-Chai Ko

Lastly, thanks to utilizing hybrid FSO/RF links, the proposed scheme achieves up to 62. 56x higher peak throughput and 21. 09x higher worst-case throughput than the cases utilizing either RF or FSO links, highlighting the importance of co-designing SAT-UAV associations, UAV trajectories, and hybrid FSO/RF links in beyond-5G NTNs.

Dimensionality Reduction Reinforcement Learning (RL)

Learning Emergent Random Access Protocol for LEO Satellite Networks

no code implementations3 Dec 2021 Ju-Hyung Lee, Hyowoon Seo, Jihong Park, Mehdi Bennis, Young-Chai Ko

A mega-constellation of low-altitude earth orbit (LEO) satellites (SATs) are envisaged to provide a global coverage SAT network in beyond fifth-generation (5G) cellular systems.

Fairness

Seq2Seq-SC: End-to-End Semantic Communication Systems with Pre-trained Language Model

no code implementations27 Oct 2022 Ju-Hyung Lee, Dong-Ho Lee, Eunsoo Sheen, Thomas Choi, Jay Pujara

In this work, we propose a realistic semantic network called seq2seq-SC, designed to be compatible with 5G NR and capable of working with generalized text datasets using a pre-trained language model.

Language Modelling Semantic Similarity +1

Simple and Effective Augmentation Methods for CSI Based Indoor Localization

no code implementations19 Nov 2022 Omer Gokalp Serbetci, Ju-Hyung Lee, Daoud Burghal, Andreas F. Molisch

We also showed that if we further augment the dataset with the proposed techniques, test accuracy is improved more than three-fold.

Data Augmentation Indoor Localization

Handover Protocol Learning for LEO Satellite Networks: Access Delay and Collision Minimization

no code implementations31 Oct 2023 Ju-Hyung Lee, Chanyoung Park, Soohyun Park, Andreas F. Molisch

This study presents a novel deep reinforcement learning (DRL)-based handover (HO) protocol, called DHO, specifically designed to address the persistent challenge of long propagation delays in low-Earth orbit (LEO) satellite networks' HO procedures.

Interference-Aware Emergent Random Access Protocol for Downlink LEO Satellite Networks

no code implementations4 Feb 2024 Chang-Yong Lim, Jihong Park, Jinho Choi, Ju-Hyung Lee, Daesub Oh, Heewook Kim

In this article, we propose a multi-agent deep reinforcement learning (MADRL) framework to train a multiple access protocol for downlink low earth orbit (LEO) satellite networks.

reinforcement-learning

Cannot find the paper you are looking for? You can Submit a new open access paper.