NDLI: Combining time-frequency transforms to create a sequence of instantaneous range-Doppler images in ISAR processing

Content Provider	IEEE Xplore Digital Library
Author	Corretja, V. Grivel, E. Berthoumieu, Y. Quellec, J.-M. Sfez, T. Kemkemian, S.
Copyright Year	2011
Description	Author affiliation: THALES SYSTEMES AEROPORTES S.A., 10, avenue de la 1ère dfl, 29200 BREST, FRANCE (Quellec, J.-M.) \|\| THALES SYSTEMES AEROPORTES S.A., 2, avenue Gay-Lussac, 78990 ELANCOURT, FRANCE (Sfez, T.; Kemkemian, S.) \|\| Université Bordeaux 1 - IPB ENSEIRB-MATMECA - IMS - UMR CNRS 5218, 351, cours de la Libération, 33405 TALENCE CEDEX, FRANCE (Grivel, E.; Berthoumieu, Y.) \|\| THALES SYSTEMES AEROPORTES S.A., 16, avenue Gustave Eiffel, 33600 PESSAC, FRANCE (Corretja, V.)
Abstract	In ISAR processing, ship classification is usually based on a range-Doppler (RD) image. The RD image is obtained by combining range alignment, phase compensation and short-time Fourier transform. Nevertheless, this leads to sophisticated approaches to weaken unwanted phenomena such as blurred images. In this paper, an alternative approach is proposed based on the time-frequency analysis. In that case, the Wigner-Ville transform provides geometrical structured events which correspond to the scatterers and unstructured ones which are associated to the artefacts and cross-terms. Taking advantage of these geometrical features, we first suggest computing a time-frequency local gradient analysis. This variational analysis provides a confidence map of the time-frequency distribution we can use to remove artefacts. Then, the practitioner can exploit the corresponding time-frequency images to choose the more appropriate instantaneous RD image. Simulation results confirm the effectiveness of this approach.
Starting Page	537
Ending Page	540
File Size	180440
Page Count	4
File Format	PDF
ISBN	9781424484447
e-ISBN	9781424484430
DOI	10.1109/CIE-Radar.2011.6159597
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-24
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Time frequency analysis Doppler effect Radar imaging Fourier transforms Coherence coherence map Inverse synthetic aperture radar time-frequency analysis aggregation operator gradient
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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