Author

Yong-Liang Guan

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Preprint Jul 2026

CSI RefineNet: A Soft Data-Aided Iterative Receiver for High-Mobility OFDM Systems

In high-mobility orthogonal frequency division multiplexing (OFDM) systems, rapid channel variation can make the channel state information (CSI) estimated from pilots inaccurate for data subcarriers, leading to a mismatch with their effective channel. To address this issue, this paper proposes a CSI RefineNet receiver,...

Yirui Luo, Yihang Xie, Yao Ge et al. · 0 citations

Preprint Aug 2026

Structured-Sparsity-Aware Joint User Activity Detection and Channel Estimation for OTFS-Based Grant-Free Random Access

Grant-free random access (GFRA) is a promising solution for massive machine-type communications (mMTC) in future wireless networks. However, reliable user activity detection and channel estimation are critical challenges, particularly when orthogonal time-frequency space (OTFS) modulation is integrated with GFRA to add...

Yao Ge, Yirui Luo, Yuhao Chi et al. · 0 citations