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Communication Link Analysis of a Low-Earth Orbit Satellites Considering Interference Sources Moving Along Various
Hyunmu Kang1, Eunjung Kang2, Hosung Choo1
1Department of Electronic and Electrical Engineering, Hongik University, Seoul 04066, Republic of Korea.
Sensors (Basel, Switzerland)
|January 8, 2025
Summary
This study introduces a novel method using parabolic paths and a genetic algorithm (GA) to identify critical interference scenarios for Low Earth Orbit (LEO) satellite communication links. This approach enhances anti-jamming system development by analyzing diverse interference source movements.
Area of Science:
- Satellite Communication
- Electromagnetics
- Aerospace Engineering
Background:
- LEO satellite communication links are vulnerable to interference from airborne sources.
- Previous analyses often used simplified straight-line paths for interference sources, limiting the scope of potential threats.
- Understanding critical interference situations is vital for developing robust anti-jamming systems.
Purpose of the Study:
- To analyze LEO satellite communication link vulnerability considering interference from airborne sources following parabolic paths.
- To identify critical interference scenarios where the jamming-to-signal (J/S) ratio remains within specific thresholds.
- To develop an optimized method for finding airborne interference source paths that challenge the communication link.
Main Methods:
- Modeling satellite and airborne interference source trajectories in the East-North-Up (ENU) coordinate system.
- Utilizing parabolic equations for interference source paths with directrices parallel to the satellite's trajectory.
- Employing a genetic algorithm (GA) with a defined cost function to find optimal interference path parameters minimizing J/S ratio deviation.
Main Results:
- Parabolic interference paths reveal more diverse and critical interference situations compared to straight paths.
- The GA successfully identified airborne interference source paths that maintain a specific J/S ratio (e.g., above -20 dB) with minimal deviation.
- Optimized interference path parameters were determined by minimizing the cost function in the GA.
Conclusions:
- The combination of parabolic path modeling and GA provides an effective method for discovering significant interference scenarios for LEO satellite links.
- This approach surpasses traditional methods using straight paths by offering a more comprehensive analysis of potential jamming threats.
- The study provides a valuable database for the operation and enhancement of anti-jamming systems in satellite communications.
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