no code implementations • 14 Mar 2024 • Jeongjae Lee, SongNam Hong
Thus, it is required to jointly optimize a reflection vector and hybrid beamforming matrices for IRS-aided mmWave MIMO systems.
no code implementations • 13 Jan 2024 • Jeongjae Lee, Hyeongjin Chung, Yunseong Cho, Sunwoo Kim, SongNam Hong
In this paper, we study the channel estimation problem for XL-RIS assisted multi-user XL-MIMO systems with hybrid beamforming structures.
no code implementations • 11 May 2023 • Ukjo Hwang, SongNam Hong
Robust reinforcement learning (RRL) aims at seeking a robust policy to optimize the worst case performance over an uncertainty set of Markov decision processes (MDPs).
no code implementations • 13 May 2022 • Dohyeok Kwon, Jonghwan Park, SongNam Hong
In federated learning (FL), it is commonly assumed that all data are placed at clients in the beginning of machine learning (ML) optimization (i. e., offline learning).
no code implementations • 25 Feb 2021 • Jeongmin Chae, SongNam Hong
We consider the problem of learning a nonlinear function over a network of learners in a fully decentralized fashion.
no code implementations • 22 Feb 2021 • Jeongmin Chae, SongNam Hong
Online federated learning (OFL) becomes an emerging learning framework, in which edge nodes perform online learning with continuous streaming local data and a server constructs a global model from the aggregated local models.
no code implementations • 17 Nov 2020 • Jeongmin Chae, SongNam Hong
Learning a function from such data is of great interest in machine learning tasks for IoT systems.
no code implementations • 22 Oct 2020 • Jeongmin Chae, SongNam Hong
We study a pool-based sequential active learning (AL), in which one sample is queried at each time from a large pool of unlabeled data according to a selection criterion.