Extraction of waveguide scattering features using joint time-frequency ISAR

Author

Trintinalia, Luiz C. ; Ling, Hao

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA

Volume

6

Issue

1

fYear

1996

fDate

1/1/1996 12:00:00 AM

Firstpage

10

Lastpage

12

Abstract

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

Keywords

adaptive signal processing; image representation; radar imaging; synthetic aperture radar; time-frequency analysis; ISAR image range axis; adaptive spectrogram; chamber measurement data; frequency-aspect plane; joint time-frequency ISAR; joint time-frequency signal representation; nonpoint scattering mechanisms; scale model airplane; time-frequency ISAR algorithm; waveguide cutoff features; waveguide scattering features; waveguide-like engine inlet; Airplanes; Cutoff frequency; Data mining; Engines; Feature extraction; Scattering; Signal representations; Spectrogram; Testing; Time frequency analysis;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.482055

Filename

482055