研究目的
To propose a scheme for moving target detection and imaging in Geosynchronous synthetic aperture radar (GEOSAR) that can effectively detect moving targets drowned in strong ground clutter.
研究成果
The proposed scheme effectively detects moving targets in GEOSAR by utilizing DPCA technology to suppress clutter from stationary targets and correcting range migration with the third-order keystone transform. Simulation results validate the scheme's effectiveness, especially for moving targets with high speed and acceleration under strong clutter conditions.
研究不足
The paper does not explicitly mention the limitations of the research.
1：Experimental Design and Method Selection:
The scheme involves using displaced phase center antenna (DPCA) to eliminate stationary targets' echo, applying the third-order keystone transform to correct range migration, and using constant false alarm ratio (CFAR) for moving target detection after coherent integration.
2：Sample Selection and Data Sources:
Simulation is used to demonstrate the effectiveness of the proposed scheme with parameters including transmitter height, flight speed of satellite, pulse repetition rate, carrier frequency, pulse width, signal bandwidth, sampling frequency, target velocity, and target acceleration.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the paper.
4：Experimental Procedures and Operational Workflow:
The process includes signal compensation according to channel parameters, DPCA application for stationary targets' echo suppression, range migration correction using three-order keystone transform, and moving target detection and imaging with FFT in azimuth dimension and CFAR.
5：Data Analysis Methods:
The effectiveness of the proposed scheme is demonstrated through simulation results showing the elimination of stationary targets and successful detection and imaging of moving targets.
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