A5104127253- Satellite Communication Systems
- Space Satellite Systems and Control
- GNSS positioning and interference
- Inertial Sensor and Navigation
- Spacecraft Design and Technology
- Indoor and Outdoor Localization Technologies
- Target Tracking and Data Fusion in Sensor Networks
- Advanced Adaptive Filtering Techniques
- Distributed Sensor Networks and Detection Algorithms
- Vehicular Ad Hoc Networks (VANETs)
- Real-Time Systems Scheduling
- Opportunistic and Delay-Tolerant Networks
- Cryptographic Implementations and Security
The Ohio State University
2023-2024
A navigation framework with differential measurements from low Earth orbit (LEO) satellite signals of opportunity is presented. This comprises a navigating rover unknown states and one or more base stations known position(s). The fuses differenced pseudorange Doppler the station(s) to LEO satellites unkown states, in an extended Kalman filter (EKF)-based tightly-coupled LEO-aided inertial system (INS), while estimating rover's simultaneously satellites' states. Simulations are conducted...
A machine learning (ML) framework for improved Starlink low Earth orbit (LEO) satellites' prediction is presented. The exploits newly published SpaceX ephemerides files containing relatively errors during the first eight hours of release. This assumes two stages: (i) data processing stage that uses to learn error between given and propagated using simplified general perturbations (SGP4) model, which are subsequently used train a time-delay neural network (TDNN); (ii) forecasting over certain...
An experimental demonstration of a ground vehicle navigating exclusively with non-cooperative multi-constellation low Earth orbit (LEO) satellite signals opportunity is presented. The satellites' unknown downlink are processed through cognitive software-defined receiver to extract Doppler frequency measurements. To account for the uncertain timing and ephemerides, correction approach employed in standalone fashion (i.e., by vehicle-mounted receiver) during an initial period global navigation...