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On-Board Communications Systems |
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– Amplitude Modulation/Phase Modulation (AM/PM) Conversion
– Clipping and related Harmonics
– Intermodulation Distortion
– L, X, S, Ku and Ka band technologies
– Regenerative Repeaters and "Bent Pipe" Satellite Systems
– Saturation Curves and linearity Backoffs
– Space Segment antenna configurations
– Transponders and Polarization Isolation
– TWTA/Klystrons and GaAsFET operations |
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Link Budgets |
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– Bit Error Rate, Forward Error Correction
– Cross-Polarization
– Intermodulation and Intrasystem Interference Noise
– Ionospheric and Tropospheric Propagation Phenomenology
– Phase Instabilities
– Rain Fade, Faraday rotation
– Satellite Transponder EIRP and G/T
– System Noise and Free Space Loss |
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Geolocation/Geopositioning (cooperative and non-cooperative) |
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– Coordinate Transformations, Geocentric vs. Geodetic, Spherical vs. Oblate, etc.
– De-Smearing of System Kinematics effects (Delay, Doppler, Stretching, Multipath)
– Error Budgets, Error Ellipses
– Geolocation of Moving Emitters
– GPS and Differential GPS Technology
– Identification of interfering signals
– Space Based & Airborne Interferometry
– Iterative Altitude Determination
– Multiple Emitter Location
– MUSIC/ESPRIT super-resolution techniques
– Noise Thresholds in Spread Spectrum
– Single-Ball and Two-Ball Geolocation
– TDOA/FDOA, TDOA-only, FDOA-only, AOA and LORAN Geolocation methods
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Optimal Communication and Multiple Access Methods |
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– AM, FM, PAM, PCM, BPSK, QPSK
– Chip Rate and Pseudorandom Noise
– Data Compression and Encoding
– Linear and Circular Polarization schemes
– Multiplexing and Transmultiplexing
– TDMA, FDMA, CDMA, SDMA, DAMA |
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Orbits and Station Keeping, Launching Methods, TT&C |
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– LEO, GEO, HEO, Molnya, and Sun-Synchronous Orbits
– NASA Orbital Elements and Perturbations
– On-Station Propulsion Systems
– Single Spacecraft and Constellations
– Telemetry Methods
– Tracking and Ranging
– Trajectory Reconstruction and Analyses |
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Earth Stations and Antenna Systems |
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– Automated Noise Thresholding
– Satellite Eclipses and Sun Blinding
– LNA/LNB Amplifier Systems
– NASA, Military, NOAA, and Commercial Ground Stations and Uplink Hubs
– Reflector and Array antennas
– SCADA systems Uplink/Downlink antennas |
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Related Applications & Adaptations |
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– Adapting NASA, NOAA, and DoD satellite/DSP software to biomedical uses
– Avionics and Navigational Systems
– Cascading of Systems
– Multipath, Doppler, Echo, Signal Strength, Polarization and other Telemetry Externals Data Extraction Techniques
– Signal Classification and Identification
– Signals Extraction from extreme noise
– Sonar and Acoustics Techniques
– Spread Spectrum & Frequency Hop
– System Simulation and Modeling
– Additional related applications
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