8 papers · 1 filter
Deadline-Bound Finite-Object Delivery over Intermittent LEO Satellite Contact Plans under Residual-Service Accounting
Houtianfu Wang, O. Tansel Baydas, Hanlin Cai +2
Low-Earth-orbit (LEO) relay networks deliver finite objects -- sensing tiles, telemetry blocks, model updates, and checkpoints -- over intermittent inter-satellite and space-to-gro…
Edge-Side Fingerprints of Service Tiering and Quota Throttling in Starlink
Houtianfu Wang, Hanlin Cai, Haofan Dong +1
We design and evaluate an edge-side measurement procedure for auditing service tiering and quota-based throttling in Starlink. Using a 232.8-hour plan-hopping campaign on a UK resi…
A reversed solar illumination dependence of unintended emission from Starlink Direct-to-Cell satellites at 72-234 MHz with the EDA2
Haofan Dong, Houtianfu Wang, Hanlin Cai +1
Second-generation Starlink Direct-to-Cell (DTC) satellites carry an additional payload for direct cellular phone connectivity whose unintended electromagnetic radiation (UEMR) at s…
Rain Rate Estimation Bounds and Weather-Adaptive Pilot Allocation for LEO Satellite ISAC
Haofan Dong, Houtianfu Wang, Hanlin Cai +2
Rain attenuates Ku-band satellite signals by up to 20~dB, encoding precipitation information along the Earth-space slant path. This paper derives the Bayesian Cramér-Rao bound (BC…
Performance Bounds and Robust Filtering for LEO Inter-Satellite Synchronization under Cross-Epoch Doppler Coupling
Haofan Dong, Houtianfu Wang, Hanlin Cai +1
Low Earth orbit (LEO) inter-satellite links (ISLs) must achieve joint synchronization and ranging under severe hardware impairments, namely oscillator phase noise, clock drift, and…
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…