Extraction of waveguide scattering features using joint time-frequency ISAR

A new joint time-frequency ISAR algorithm that combines the conventional ISAR processing with the joint time-frequency signal representation is presented. The adaptive spectrogram, applied to the range axis of the ISAR image, is used as the time-frequency processing engine. The algorithm is tested u...

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Bibliographic Details
Published in:IEEE microwave and guided wave letters 1996-01, Vol.6 (1), p.10-12
Main Authors: Trintinalia, L.C., Hao Ling
Format: Article
Language:English
Subjects:
Airplanes
Applied sciences
Cutoff frequency
Data mining
Engines
Exact sciences and technology
Feature extraction
Radiolocalization and radionavigation
Scattering
Signal representations
Spectrogram
Telecommunications
Telecommunications and information theory
Testing
Time frequency analysis
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Description
Summary:A new joint time-frequency ISAR algorithm that combines the conventional ISAR processing with the joint time-frequency signal representation is presented. The adaptive spectrogram, applied to the range axis of the ISAR image, is used as the time-frequency processing engine. The algorithm is tested using the chamber measurement data from a scale model airplane. The results show that the nonpoint scattering mechanisms due to the waveguide-like engine inlet can be seamlessly removed, leading to an enhanced ISAR image consisting only of point scatterers. Furthermore, the extracted inlet features are displayed in the frequency-aspect plane and show distinct waveguide cutoff features.
ISSN:1051-8207
1558-2329
DOI:10.1109/75.482055