3 papers
eess.SP2026
ST-DDA: Dynamic Channel Estimation in the Doppler-Delay-Angle Domain via Sparse Subspace Tracking for TDD Systems
Xu Zhu, Tiejun Li
Accurate full-band channel acquisition in frequency-hopping time-division duplex (TDD) systems is challenging because each sounding slot observes only a limited frequency subband,…
eess.SP2026
Dual-Mapping Sparse Vector Coding for Phase Noise-Resilient Short-Packet Transmission
Yanfeng Zhang, Xi'an Fan, Xu Zhu +6
Sparse vector transmission (SVT) has emerged as a promising technique for ultra-reliable low-latency short-packet communications. However, existing SVT schemes typically assume neg…
cs.IT2026
Covering-radius and Collinearity- Minimizing Pilots for Channel Estimation in TDD Systems
Xu Zhu, Yi Zeng, Tiejun Li
This letter studies pilot design for orthogonal frequency-division multiplexing-based time-division duplex (TDD) systems under a sliding-window latest-slot recovery framework that…