Results 161 to 170 of about 14,928 (214)

Efficient classification of ISAR images

IEEE Transactions on Antennas and Propagation, 2005
In this paper, we propose a method to classify inverse synthetic aperture radar images from different targets. Our approach can provide efficient features for classification by the combined use of a polar mapping procedure and a well-designed classifier. The resulting feature vectors are able to meet the requirements that efficient features should have:
null Kyung-Tae Kim, null Dong-Kyu Seo, null Hyo-Tae Kim   +2 more
openaire   +1 more source

Polar reformatting for ISAR imaging

Proceedings of the 1998 IEEE Radar Conference, RADARCON'98. Challenges in Radar Systems and Solutions (Cat. No.98CH36197), 2002
Polar reformatting is a technique that has been developed and used extensively in spotlight SAR processing. The prerequisite for using this technique is to know the radar's aspect angle, with respect to the target, for each pulse received by this radar.
R. Lipps, D. Kerr
openaire   +1 more source

Multistatic 3D ISAR image reconstruction

2015 IEEE Radar Conference (RadarCon), 2015
InISAR imaging has proven an effective tool to produce 3D target reconstruction. 3D target reconstruction solves the problems related to the ISAR image interpretation, due to the unknown target's projection onto the image projection plane. Nevertheless, problems related to shadowing are not solved as scatterers that are not visible cannot be detected ...
SALVETTI, FEDERICA, STAGLIANO', DANIELE, GIUSTI, ELISA, MARTORELLA, MARCO   +3 more
openaire   +2 more sources

ISAR for concealed objects imaging

SPIE Proceedings, 2015
A new promising architecture of microwave personnel screening system is analyzed in this paper with numerical simulations. This architecture is based on the concept of inverse aperture synthesis applied to a naturally moving person. The extent of the synthetic aperture is formed by a stationary vertical linear antenna array and by a length of subject’s
A. Zhuravlev, V. Razevig, I. Vasiliev, S. Ivashov, V. Voronin   +4 more
openaire   +1 more source

Superresolution techniques and ISAR imaging

Proceedings of the IEEE National Radar Conference, 2003
High-resolution optimal estimation techniques are applied to the problem of radar imaging of rotating objects, sometimes referred to as ISAR (inverse synthetic array radar) imaging. Typical digital range-Doppler processing operations are described, utilizing two spectral estimation techniques. Quality ISAR images have been obtained from such processing,
openaire   +1 more source

ISAR Image Formation

2014
In this chapter, we will introduce the most commonly used ISAR range-Doppler image formation. However, if the Doppler spectrum generated by a rotating target has severe time variation, ISAR range-Doppler image will become smeared in the Doppler domain. In these cases, in addition to conventional rotational motion compensation (RMC) methods such as the ...
openaire   +1 more source

Complex object's ISAR image simulation

Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005
This paper concerns the Inverse Synthetic aperture radar (ISAR) image of an object over a perfectly conducting ground plane or a lossy dielectric such as sea water. The first step, the “shooting and bouncing rays” (SBR) is used to solve this problem. The next step, the wide signal bandwidths and synthetic aperture are used to resolve objects rotating ...
null Wen Xiaoyang, null Wang Chao, null Zhang Hong   +2 more
openaire   +1 more source

Applications of ISAR Imaging

2014
Inverse synthetic aperture radar (ISAR) imaging is typically useful when there is a need to classify, recognize, or identify a moving target of interest. In fact, an ISAR image highlights two-dimensional (2-D) geometric features of a target, which can provide indications of target's type, size, and other salient information.
openaire   +1 more source

3D Tower-Turntable ISAR Imaging

2007 European Radar Conference, 2007
This paper studies the effects of peculiarities of an experimental stepped-frequency measurement system in a tower-turntable setup on three-dimensional inverse synthetic aperture radar imaging by simulation of ideal point scatterers. Particular a phase drift, an offset of the elevation rotation center and near range distortion have to be compensated ...
Kempf, Timo, Peichl, Markus, Dill, Stephan, Süß, Helmut   +3 more
openaire   +2 more sources

Atomic Decomposition for ISAR Imaging

2006 IEEE Conference on Radar, 2006
We explore the capabilities of atomic decomposition (AD) for ISAR imaging. On the contrary to our previous work with AD where our research was focused on radar signal detection and maximization of sensitivity, the main concern in ISAR imaging based on AD is to obtain focused images, target feature extraction and low computational burden.
O.A. Yeste-Ojeda, J. Grajal
openaire   +1 more source