Analyse des micro-Doppler de cibles mobiles déformables en imagerie radar

Abstract : n traditional ISAR imaging, rigid-body motion is usually assumed without considering non-stationary targets. Relative motion or deformation of parts of illuminated objects induce additional features in the Doppler frequency spectra. These features are called micro-Doppler effect and appear as sidebands around the central Doppler frequency. They can provide valuable information about the structure of the moving parts and may be used for recognition purposes. Previous papers have mostly focused on temporal micro-Doppler analysis. Besides except theoretical case studies, there are very few models and real data of non-stationary targets. Through the study of the wheel and the human motion, we propose in this thesis to emphasize and model the motion involving a micro-Doppler effect. We use both the micro-Doppler and a high range resolution analysis to finely characterize such non-stationary targets in radar imaging. Moreover we emphasize the influence of the relative geometry between the radar and the target. This thesis lies on a significant experimental part with the use of data provided by the ultra-wide band radar HYCAM developed by ONERA. In addition, the development of a simulator tool permits to link experimental data and models in order to extract physical features.
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Submitted on : Friday, October 21, 2011 - 5:25:07 PM
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  • HAL Id : pastel-00634637, version 1

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Antoine Ghaleb. Analyse des micro-Doppler de cibles mobiles déformables en imagerie radar. Traitement du signal et de l'image. Télécom ParisTech, 2009. Français. ⟨pastel-00634637⟩

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