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Performance Analysis of Uplink Code Division Multiplexing for LEO Satellite Constellations Under Nonlinear Power
Monica Visintin1, Riccardo Schiavone1, Roberto Garello1
1Department of Electronics and Telecommunications (DET), Politecnico di Torino, 10129 Torino, Italy.
Sensors (Basel, Switzerland)
|November 9, 2024
Summary
Operating a ground station
Area of Science:
- Satellite communication systems engineering.
- Non-linear amplifier analysis in telecommunications.
Background:
- LEO satellite constellations utilize code division multiplexing.
- Ground station high-power amplifier (HPA) performance is critical for uplink communication.
Purpose of the Study:
- To analyze the impact of HPA input power on LEO constellation uplink performance.
- To investigate optimal HPA operation for energy efficiency and simplified design.
Main Methods:
- Mathematical modeling of communication link performance.
- Analysis of non-linear HPA behavior at saturation.
- Derivation of analytical performance formulas and validation via simulation.
Main Results:
- HPA input power significantly affects system performance.
- Operating the HPA at saturation improves energy efficiency.
- Transmitting the sign of the sum of signals is feasible at saturation.
Conclusions:
- Saturated HPA operation simplifies ground station design and operation.
- Analytical models provide accurate performance estimation for varying satellite numbers.
- Findings offer insights for power-efficient satellite uplink communication.
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