Author

Shao-Hua Li

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Preprint Oct 2026

Model-Order-Adaptive Channel Estimation for AFDM Systems with Fractional Delay and Doppler

Affine frequency division multiplexing (AFDM) has emerged as a promising waveform for high-mobility communications owing to its ability to exploit multipath diversity. However, channel state information (CSI) acquisition remains challenging in channels with fractional delay and Doppler and an unknown number of propagat...

Rui-Zhe Wang, Cun-Hua Pan, Hong Ren et al. · 0 citations

Open access Sep 2026

Azimuth-Extended Spotlight SAR Based on Multifrequency Subpulse Diversity

An azimuth wide-swath spotlight synthetic aperture radar (SAR) imaging method utilizing multifrequency subpulse (MFSP) diversity is proposed. Initially, the MFSP scheme is formulated by dividing the transmit pulse into multiple subpulses, where each is assigned a distinct carrier frequency offset with bandwidth-level s...

Hai Huang, Xi-Min Li, Sheng-Qi Zhu et al. · Remote Sensing · 0 citations

Preprint Aug 2026

AFDM-ISAC With Fractional Delay-Doppler Coupling

Affine frequency division multiplexing (AFDM) is a promising chirp-based multicarrier waveform for high-mobility integrated sensing and communication (ISAC). Accurate angle, delay, and Doppler estimation is essential for AFDM sensing. Since target delays and Doppler shifts are generally continuous-valued, representing...

Shao-Hua Li, Cun-Hua Pan, Hong Ren et al. · 0 citations