Subaperture Keystone Transform Matched Filtering Algorithm and Its Application for Air Moving Target Detection in an SBEWR System

Long-time coherent integration is an effective approach to improve detection performance for weak air moving targets (AMTs). The range position variation and azimuth Doppler variation will easily exceed range gate and Doppler resolution in a long observation time, resulting in severe performance deg...

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Bibliographic Details
Published in:IEEE journal of selected topics in applied earth observations and remote sensing 2023, Vol.16, p.2262-2274
Main Authors: Zhan, Muyang, Zhao, Chanjuan, Qin, Kun, Huang, Penghui, Fang, Ming, Zhao, Chunlei
Format: Article
Language:English
Subjects:
Air moving target (AMT) detection
Algorithms
Azimuth
Clutter
Computer applications
Detection
Doppler effect
Doppler sonar
Early warning radar
Filtering
Filtration
Integration
keystone transform (KT)
long-time coherent integration
Maneuverability
Manoeuvrability
Methods
Moving targets
Object detection
Performance degradation
Radar
Radar detection
spaceborne early warning radar (SBEWR)
Spaceborne radar
Target detection
Transforms
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Summary:Long-time coherent integration is an effective approach to improve detection performance for weak air moving targets (AMTs). The range position variation and azimuth Doppler variation will easily exceed range gate and Doppler resolution in a long observation time, resulting in severe performance degradation, especially for high maneuverability target. Besides, the high detection performance and low computational complexity ability are, most of times, the contradiction requirements by using the existing long-time coherent integration algorithms. To overcome above constraints, a novel subaperture keystone transform matched filtering (SAKTMF) method is developed in this article based on the conventional hybrid integration (HI) algorithm, which can realize coherent integration both within the subaperture and among subapertures, effectively improving the detection performance of a weak moving target. Furthermore, the proposed SAKTMF is applied for weak AMT detection in spaceborne early warning radar, which considers serious extended clutter, range migration, and Doppler migration problems simultaneously. Simulation experiments processing results show that the proposed method can provide improved detection performance compared with the conventional HI methods.
ISSN:1939-1404
2151-1535
DOI:10.1109/JSTARS.2023.3245295