Affine frequency division multiplexing (AFDM) is a promising chirp-based waveform for high-mobility and underwater acoustic communications. However, underwater acoustic channels are inherently wideband and characterized by timescaling effects, where Doppler distortion cannot be accurately modeled as a simple frequency...
Yi-Yang Xiong, Hao-Ran Yin, Yan-Qun Tang et al.· International Symposium on W...· 0 citations
A CSI RefineNet receiver is proposed, where the CSI is iteratively refined using soft symbol decisions in a data-aided manner, and achieves superior BER performance and strong robustness under different velocities, modulation orders, and pilot spacing configurations in high-mobility OFDM systems.
Yi-Rui Luo, Yihang Xie, Yao Ge et al.· 0 citations
This work develops an efficient data-aided iterative receiver, in which reliably decoded data symbols are fed back as additional pseudo-pilot information to assist channel estimation and sensing, and develops a grid evolution procedure that iteratively adjusts the virtual grids in the discrete affine Fourier domain acc...
Yi-Rui Luo, Yong-Liang Guan, Yao Ge et al.· IEEE Transactions on Communi...· 1 citation
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
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