Research scope
Ongoing MSc research on estimating residual Doppler and carrier frequency offsets in low-Earth-orbit LoRa communications.
Methodology
- Preserve and analyze raw RTL-SDR IQ captures.
- Compute orbit-based Doppler predictions using SGP4 and radial velocity.
- Estimate signal frequency offset from the received waveform.
- Study residual errors while accounting for clock calibration and avoiding data leakage across satellite passes.
Important distinction
Carrier frequency offset is not identical to orbital Doppler. Oscillator offsets and receiver effects must be considered separately.
Current status
Research and experimental validation are ongoing; no model performance claims are published here yet.