4 papers
Weighted-Sum Energy Efficiency Maximization in User-Centric Uplink Cell-Free Massive MIMO
Donghwi Kim, Liesbet Van der Perre, Wan Choi
This paper introduces the weighted-sum energy efficiency (WSEE) as an advanced performance metric designed to represent the uplink energy efficiency (EE) of individual user equipme…
Extended Universal Joint Source-Channel Coding for Digital Semantic Communications: Improving Channel-Adaptability
Eunsoo Kim, Yoon Huh, Wan Choi
Recent advances in deep learning (DL)-based joint source-channel coding (JSCC) have enabled efficient semantic communication in dynamic wireless environments. Among these approache…
DFT-based Near-field Beam Alignment: Model-based and Data-Driven Hybrid Approach
Hongjun Heo, Wan Choi
Accurate beam alignment is a critical challenge in XL-MIMO systems, especially in the near-field regime, where conventional far-field assumptions no longer hold. Although 2D grid-b…
Graph Neural Network based Active and Passive Beamforming for Distributed STAR-RIS-Assisted Multi-User MISO Systems
Ha An Le, Trinh Van Chien, Wan Choi
This paper investigates a joint active and passive beamforming design for distributed simultaneous transmitting and reflecting (STAR) reconfigurable intelligent surface (RIS) assis…