Xingwang Li

Effective Beam Training for Near-Field Wideband Terahertz Extremely Large-Scale Arrays

Extremely large-scale array (XL-array) is envisioned as a key technology for future terahertz (THz) communication networks. However, the near-field beam split effect severely degrades beam training performance in wideband THz XL-array systems. In this letter, we reveal that the near-field array gain is considerably mor...

Sensing-Based Two-Stage Transmission Framework for Near-Field mmWave Covert Communications

This letter investigates a two-stage near-field covert communication for wideband millimeter-wave (mmWave) systems. During the sensing stage, we propose a novel sensing scheme exploiting controllable near-field beam squint, enabled by phase shifters (PSs) and true-time delays (TTDs), to acquire the channel state inform...

Cross-Regional Precipitation Estimation From Commercial Microwave Links via CNN-LSTM

Physical Layer Security for STAR-RIS-Assisted NOMA Backscatter Communications Against Multiple Eavesdroppers

Simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RIS) have emerged as a transformative technology for achieving omnidirectional coverage in smart radio environments, enabling energy-efficient and spectrally efficient wireless communications. When integrated with ambient backscatter c...

Dynamic Resource Allocation for RIS-Assisted Full-Duplex ISAC via Hybrid Lagrangian-DRL Approach

Integrated Sensing and Communication (ISAC) is emerging as a key technology for next-generation wireless networks, enabling simultaneous communication and sensing functionalities. This paper focuses a RIS-assisted full-duplex (FD) ISAC system, in which a multi-antenna base station (BS) concurrently performs multi-user...