4 papers
Statistical Ambiguity-Function-Aware Joint Beamforming and Subcarrier Allocation for MIMO-OFDM ISAC under Random Symbols
Wonill Kim, Yumin Kim, Hyeonsu Lyu +1
Ambiguity function (AF) characterizes the delay--Doppler sidelobe structure that governs target resolution and masking in radar sensing. In ISAC, however, random communication symb…
Self-Supervised Pretraining for Transmission-Relevant MIMO CSI Representation
Sehyun Ryu, Yumin Kim, Minjae Lee +2
Self-supervised representation learning from unlabeled channel state information (CSI) can reduce labeling and adaptation overhead in learning-based multiple-input multiple-output…
End-to-End Secure Connection Probability in MultiLayer Networks with Heterogeneous Rician Fading
Hyeonsu Lyu, Yumin Kim, Hyun Jong Yang
Ensuring physical-layer security in non-terrestrial networks (NTNs) is challenging due to their global coverage and multi-hop relaying across heterogeneous network layers, where th…
Accuracy-Delay Trade-Off in LLM Offloading via Token-Level Uncertainty
Yumin Kim, Hyeonsu Lyu, Minjae Lee +1
Large language models (LLMs) offer significant potential for intelligent mobile services but are computationally intensive for resource-constrained devices. Mobile edge computing (…