The rapid deployment of broadband low Earth orbit (LEO) constellations provides new opportunities for next-generation navigation. Compared with conventional global navigation satellite systems (GNSS), broadband LEO systems provide stronger received signals, wider bandwidths, rapidly varying satellite geometry, and larg...
Zhen-Dong Li, Min Zhu, Jia-Hao Liu et al.· 0 citations
Movable antenna (MA) technology has recently emerged as a promising paradigm for enhancing the flexibility and performance of wireless systems by allowing antennas to dynamically adjust their spatial positions within a confined region. Meanwhile, integrated sensing and communication (ISAC) has attracted significant att...
Zhen-Dong Li, Zhou Su, Jian-Le Ba et al.· 0 citations
This paper proposes a novel aerial reconfigurable intelligent surface (RIS)-aided secure integrated sensing and communication (ISAC) architecture. An unmanned aerial vehicle (UAV)-mounted RIS establishes virtual line-of-sight links to bypass blockages, serving legitimate users while sensing potential eavesdroppers. To...
Zhen-Dong Li, Ze-Sheng Zhang, Zhou Su et al.· 0 citations
Dynamic environments pose fundamental challenges to integrated sensing and communication (ISAC), particularly due to severe Doppler effects, rapidly time-varying channels, and the intricate coupling between delay and Doppler shifts. Affine frequency-division multiplexing (AFDM), with its inherent capability of characte...
Lin-Chu Chen, Zhen-Dong Li, Zhou Su et al.· 0 citations
Integrated sensing and communication (ISAC) has emerged as a key enabler for sixth-generation (6G) networks, yet its broadcast nature at the physical layer leaves transmissions vulnerable to malicious eavesdropping, particularly when physical blockages degrade direct links. Reconfigurable intelligent surface (RIS) offe...
Zhen-Dong Li, Jin-Yuan Huang, Wei-Chun Zhao et al.· 0 citations
This paper proposes an movable antenna (MA)-enabled secure ISAC system that utilizes the spatial degrees of freedom of MA to mitigate these risks and introduces a gradient-based meta learning (GML) algorithm, which works without pre-training and demonstrates favorable performance.
Zhen-Dong Li, Yujie Zhao, Zhou Su et al.· 0 citations
Simulation results demonstrate that compared with benchmark schemes, the proposed algorithm can better guarantee the secrecy rate and effectively track the moving trajectory of the eavesdropper.
Zhen-Dong Li, Wei-Chun Zhao, Zhou Su et al.· 0 citations
An alternating optimization (AO) framework is proposed, employing techniques including discrete binary particle swarm optimization (BPSO), successive convex approximation (SCA) and difference-of-convex (DC) programming to transform the optimization problem into convex subproblems.
Zhen-Dong Li, Min Zhu, Zhou Su et al.· 0 citations
The key advantages of MA-enabled WPNs in enhancing wireless power transfer efficiency, realizing flexible and adaptive beamforming, and improving system robustness and interference resilience are highlighted.
Zhen-Dong Li, Yi-Ran Zheng, Tian-Yu Li et al.· 0 citations
This paper investigates over-the-air (OTA) computation enabled online federated learning (FL) in low-Earth orbit (LEO) satellite networks and develops a proximal policy optimization (PPO)-based deep reinforcement learning framework that jointly optimizes adaptive beam hopping and power control.
Zhen-Dong Li, Shao-Jie Wang, Zhou Su et al.· 0 citations
This article outlines the fundamental principles of the dual-layer OTA model and introduces the adaptive BH mechanism designed for time-varying topologies, aiming to provide insights for the evolution of ubiquitous non-terrestrial intelligence.
Zhen-Dong Li, Shao-Jie Wang, Zhou Su et al.· 0 citations
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