Backprojection Autofocus of Large Ships with Arbitrary Motion for Synthetic Aperture Radar

Aron Sommer

doi:10.51202/9783186867100

Zusammenfassung

Radar images of the open sea taken by airborne synthetic aperture radar (SAR) show typically several smeared ships. Due to their non-linear motions on a rough sea, these ships are smeared beyond recognition, such that their images are useless for classification or identification tasks. The ship imaging algorithm presented in this thesis consists of a fast image reconstruction using the fast factorized backprojection algorithm and an extended autofocus algorithm of large moving ships. This thesis analysis the factorization parameters of the fast factorized backprojection algorithm and describes how to choose them nearoptimally in order to reconstruct SAR images with minimal computational costs and without any loss of quality. Furthermore, this thesis shows how to estimate and compensate for the translation, the rotation and the deformation of a large arbitrarily moving ship in order to reconstruct a sharp image of the ship. The proposed autofocus technique generates images in which the ...

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Bibliographische Angaben

Copyrightjahr: 2020
ISBN-Print: 978-3-18-386710-3
ISBN-Online: 978-3-18-686710-0
Verlag: VDI Verlag, Düsseldorf
Reihe: Informatik/ Kommunikation
Band: 867
Sprache: Deutsch
Seiten: 128
Produkttyp: Monographie

Inhaltsverzeichnis

KapitelSeiten

Titelei/Inhaltsverzeichnis Teilzugriff Seiten I - X Download Kapitel (PDF)
1. Synthetic Aperture Radar Kein Zugriff
2. Fast Factorized Backprojection Kein Zugriff
3. Autofocus of Large Ships Kein Zugriff
4. Structure of the Thesis Kein Zugriff
1. Fundamentals of Synthetic Aperture Radar Kein Zugriff
2. Signal Model of a Static Scene Kein Zugriff
3. Global Backprojection Kein Zugriff
4. Image Quality Metrics Kein Zugriff
5. Backprojection Autofocus Kein Zugriff
6. Real Data Example Kein Zugriff
1. Fast Factorized Backprojection Kein Zugriff
2. Computational Costs Kein Zugriff
3. Exact Range Error Computation Kein Zugriff
4. Image Error Estimation Kein Zugriff
5. Parameter Analysis and Optimization Kein Zugriff
6. Optimal Parameter Choice Rule Kein Zugriff
7. 1. Narrow Swath SAR using Gotcha data Kein Zugriff
  2. Squinted SAR using SmartRadar data Kein Zugriff
1. Ship Detection and Location Estimation Kein Zugriff
2. Signal Model of a Moving Ship Kein Zugriff
3. Effects of Arbitrary Motion on SAR Images Kein Zugriff
4. Optimal Focus Using True Motion Kein Zugriff
5. State-of-the-Art Autofocus of Ships Kein Zugriff
6. Extended Autofocus Algorithm of Large Ships Kein Zugriff
7. 1. Autofocus of a Large Tanker Kein Zugriff
  2. Autofocus of a Large Bulk Carrier Kein Zugriff
  3. Autofocus of a Self-Discharging Bulk Carrier Kein Zugriff
  4. Autofocus of a Static Scene with Low-Cost INS Kein Zugriff
Conclusions Kein Zugriff Seiten 112 - 116
A Appendix Kein Zugriff Seiten 117 - 118
Bibliography Kein Zugriff Seiten 119 - 128