Underfitting Autoencoder-Based Unsupervised Framework for Real-Time Channel Quality Assessment in HF-OFDM Systems
High-frequency orthogonal frequency division multiplexing (HF-OFDM) systems demand precise and real-time channel state information (CSI) for adaptive modulation and coding (AMC), yet the rapid temporal dynamics and scarcity of labeled data inherent in ionospheric channels render conventional assessment methods inadequa...