Preprint
Oct 2026
Grid-Refinement SBL for AFDM Channel Estimation Under Fractional Delay and Fractional Doppler Channels
This paper investigates channel estimation for affine frequency division multiplexing (AFDM) systems over channels with fractional delay and fractional Doppler (FDFD) shifts. An exact FDFD channel model is first established, and the corresponding input--output relationship is also derived. To address the FDFD-induced d...
Qu Luo, Li-Min Liu, Zhe Li et al.
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