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eess.SP2026
Online Movable Antenna Repositioning Under Movement Delay and a Long-Term Energy Budget
Yunseob Tae, Jeongjae Lee, Songnam Hong
Movable antenna (MA) systems improve the channel by repositioning antennas, but each repositioning interrupts data transmission for a time set by the largest displacement and consu…
eess.SP2026
Scalable Rate-Splitting Precoding via Recurrent Structure-Preserving Graph Neural Networks
Wonseok Choi, Jeongjae Lee, Songnam Hong
Graph neural network (GNN)-based precoding has demonstrated strong potential for scalable multi-user beamforming in multi-user multiple-input single-output (MU-MISO) systems under…
eess.SP2026
Channel Estimation for Reconfigurable Intelligent Surface Assisted Upper Mid-Band MIMO Systems
Jeongjae Lee, Chanwon Kim, Songnam Hong
The upper mid-band (UMB) spectrum is a key enabler for 6G systems, yet reconfigurable intelligent surface (RIS)-assisted UMB communications face severe channel estimation challenge…