6 papers
Environment-to-Link ISAC with Space-Weather Sensing for Ka-Band LEO Downlinks
Houtianfu Wang, Haofan Dong, Hanlin Cai +1
Ka-band low-Earth-orbit (LEO) downlinks can suffer second-scale reliability collapses during flare-driven ionospheric disturbances, where fixed fade margins and reactive adaptive c…
AFDM for LEO Inter-Satellite Links: Path-Level CSI Prediction and CRLB-Guided Pre-Equalization
Houtianfu Wang, Ozgur Akan
Low-Earth-orbit (LEO) inter-satellite links must cope with strongly doubly selective channels and aged channel state information (CSI). In this paper, the term ``sensing'' refers t…
Fundamental Limits of Cooperative Integrated Sensing and Communications over Low-Earth Orbit THz Satellite Channels
Haofan Dong, Houtianfu Wang, Hanlin Cai +1
Terahertz inter-satellite links enable unprecedented sensing precision for Low Earth Orbit (LEO) constellations, yet face fundamental bounds from hardware impairments, pointing err…
Graph Representation-based Model Poisoning on Federated Large Language Models
Hanlin Cai, Haofan Dong, Houtianfu Wang +2
Federated large language models (FedLLMs) enable powerful generative capabilities within wireless networks while preserving data privacy. Nonetheless, FedLLMs remain vulnerable to…
Semantic Communication for the Internet of Space: New Architecture, Challenges, and Future Vision
Hanlin Cai, Houtianfu Wang, Haofan Dong +1
The expansion of sixth-generation (6G) wireless networks into space introduces technical challenges that conventional bit-oriented communication approaches cannot efficiently addre…
Gravitational Communication: Fundamentals, State-of-the-Art and Future Vision
Houtianfu Wang, Ozgur B. Akan
This paper provides a comprehensive overview of fundamentals and the latest research progress in gravitational communication, with a detailed historical review of gravitational wav…