نتایج جستجو برای: رادار دهانه ترکیبی معکوس isar

تعداد نتایج: 38998  

2015
Xueping Lu Shapu Ren

In bistatic inverse synthetic aperture radar (Bi-ISAR) system, its image resolution is lower than monostatic ISAR system. In order to solve this problem, the linear prognosis algorithm is adopted in the imaging process and the imaging algorithm based on linear prognosis is proposed. Space target Bi-ISAR imaging is taken as example in the research. The one-dimensional range profile is created th...

2015
Yong Wang Ali Cherif Abdelkader Bin Zhao Jinxiang Wang

Inverse synthetic aperture radar (ISAR) imaging of a maneuvering target is a challenging task in the field of radar signal processing. The azimuth echo can be characterized as a multi-component polynomial phase signal (PPS) after the translational compensation, and the high quality ISAR images can be obtained by the parameters estimation of it combined with the Range-Instantaneous-Doppler (RID)...

2012
F. Benedetto G. Albanese

This work proposes a new automatic target classifier, based on a combined neural networks’ system, by ISAR image processing. The novelty introduced in our work is twofold. We first present a novel automatic classification procedure, and then we discuss an improved multimedia processing of ISAR images for automatic object detection. The classifier, composed by a combination of 20 feed-forward ar...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد یزد - دانشکده برق و الکترونیک 1392

چکیده این پایان نامه یک روش جدید برای بخش بندی تصاویر ماهوارهایsar ارایه می دهد که به دو فرآیند بخش بندی متکی است. بر اساس الگوریتم پیشنهاد شده، اطلاعات سطح خاکستری مربوط به بافت هر ناحیه از تصویر sar با استفاده از اتوماتای یادگیر سلولی (cla) پردازش می شوند. روش پیشنهادی بدین صورت است که در دو مرحله بخش بندی انجام می شود. در مرحله اول از بخش بندی تصویر ورودی ماهواره ای sar با استفاده از cla پر...

2011
X. Y. He X. B. Wang X. Y. Zhou B. Zhao T. J. Cui

We present an efficient way to generate the inverse synthetic aperture radar (ISAR) image of a target at an arbitrary aspect angle using the shooting and bouncing ray (SBR) method, which is much faster than the conventional approach by inverse Fourier transforming the computed scattered fields over frequency and aspect domain. We propose a general image-domain ray-tube integration formula, whic...

Journal: :EURASIP J. Adv. Sig. Proc. 2010
José M. Muñoz-Ferreras Félix Pérez-Martínez

Inverse Synthetic Aperture Radar (ISAR) is a coherent radar technique capable of generating images of noncooperative targets. ISAR may have better performance in adverse meteorological conditions than traditional imaging sensors. Unfortunately, ISAR images are usually blurred because of the relative motion between radar and target. To improve the quality of ISAR products, motion compensation is...

2013
Wei Qiu Marco Martorella Fabrizio Berizzi

Inverse Synthetic Aperture Radar (ISAR) images are often used for target classification and recognition applications. However, conventional 2D images do not provide the height information about the scattering centers. In this paper, an interferometric ISAR imaging method based on compressive sensing (CS) is proposed that is able to estimate the scatterering centres heights. The interferometric ...

2015
Shreya Verma

Inverse Synthetic Aperture Radar (ISAR) is used to produce high resolution imagery of non-cooperative targets by retrieving the relative motion parameters of a target with respect to a reference. This concept of estimating motion parameters is applied for obtaining cross-range resolution in ISAR imaging in which one component is produced by the relative motion between the radar and the target a...

Journal: :EURASIP J. Adv. Sig. Proc. 2008
Yong Wang Yi-Cheng Jiang

When reconstructing the ISAR image of a maneuvering target rotating approximately with the equal changing acceleration, the received signals can be considered as the multicomponent cubic phase signals. If the model of rotating with constant acceleration is used here, the errors of the reconstructed images cannot be neglected, and a lot of pseudoscatterers are produced. Hence, the ISAR imaging o...

2011
Michael Noll-Hussong Alexander Otti Afra M. Wohlschlaeger Peter Henningsen Claus Zimmer Harald Guendel

a Klinik und Poliklinik fuer Psychosomatische Medizin und Psychotherapie, University of Ulm, Am Hochstraess 8, D-89081 Ulm, Germany; e-mail: [email protected] b Abteilung fuer Neuroradiologie, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, D-81675 Muenchen, Germany c Klinik und Poliklinik fuer Psychosomatische Medizin und Psychotherapie, Klinikum rechts der Isar,...

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