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Improved 2D Ground Target Tracking in GPS-Based Passive Radar Scenarios.
Pedro Gomez-Del-Hoyo1, Nerea Del-Rey-Maestre1, María-Pilar Jarabo-Amores1
1Signal Theory and Communications Department, Polytechnic School, University Campus, University of Alcalá, 28805 Madrid, Spain.
Sensors (Basel, Switzerland)
|March 10, 2022
Summary
This study demonstrates that ground targets can be detected and localized using a single Global Positioning System (GPS) transmitter. Advanced signal processing techniques overcome low signal power for effective passive radar applications.
Area of Science:
- Remote Sensing
- Signal Processing
- Radar Systems
Background:
- Global Positioning System (GPS) satellites provide global coverage, presenting an opportunity for passive radar systems.
- Low signal power from GPS at ground level limits passive radar system coverage.
- Digital array processing is crucial for ground target localization in passive radar.
Purpose of the Study:
- To present a GPS-based passive radar system utilizing a single illumination source.
- To address low signal power limitations using advanced processing techniques.
- To achieve ground target localization with high accuracy.
Main Methods:
- A processing scheme combining reconstructed reference signals, adaptive filtering, and spatial filtering was implemented.
- Conventional beamforming enhanced target echo levels.
- High-resolution Direction of Arrival (DoA) estimation techniques determined target azimuth.
Main Results:
- Ground target detection and localization were confirmed as feasible using a single GPS transmitter.
- System geometry, range, and azimuth information were used for localization.
- Validation was performed using both synthetic and real radar data, including a cooperative vehicle.
Conclusions:
- A single GPS transmitter is sufficient for effective ground target detection and localization.
- The proposed processing scheme successfully overcomes low signal power challenges.
- This research validates the potential of GPS-based passive radar for ground surveillance.
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