Results 131 to 140 of about 5,548 (180)

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 ...
Victor C. Chen, Marco Martorella
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Simulation of ISAR Imaging for a Missile

2007 International Conference on Microwave and Millimeter Wave Technology, 2007
In this paper, physical optical (PO) method is introduced and applied to calculate the echo data from a missile illuminated by plane waves with arbitrary aspects and different frequencies for inverse synthetic aperture radar (ISAR) imaging. The missile is approximated by component disassembly method (CMD) and concept of scattering matrix is introduced ...
Jianjun Gao, Fulin Su, Guodong Xu
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Sample fitting in ISAR imaging [PDF]

Proceedings of IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting, 2002
This paper investigates the effect of sample fitting on ISAR image quality. Usually motion compensation consists of two stages. The first stage is aimed at removing the gross radial motion (i.e. range cell alignment). The second stage attempts to remove the residual phase variations not corrected in the first stage because of noise and other jamming ...
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Methods for the rotation of ISAR images

2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar, 2009
Image rotation plays an important role in image understanding. The rotation of inverse synthetic aperture radar images can be done either in the image forming process or after. Also, when the image is rotated in the imaging forming process, it can be performed both in the time-domain and the frequency-domain. This paper introduces three methods for the
Zhong-hai Zhou, Chun-mao Yeh, Bin Zhou
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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.
Omar A. Yeste-Ojeda, Jesus Grajal
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Multipath effects on ISAR image reconstruction

IEEE Transactions on Aerospace and Electronic Systems, 1998
The effects of specular multipath on the reconstruction of high resolution target image provided by an inverse synthetic aperture radar (ISAR) are investigated. First, a model of the received signal that takes into account the reflections produced by the surface of the Earth is defined, Then, the impulse response of the imaging system used to ...
BERIZZI, FABRIZIO, DIANI, MARCO
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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,
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Hybrid SAR/ISAR for distributed ISAR imaging of moving targets

2015 IEEE Radar Conference (RadarCon), 2015
The hybrid SAR/ISAR processing takes advantages of both SAR and ISAR to generate high-resolution imagery of moving targets. In this paper, we introduce the concept of hybrid SAR/ISAR, discuss how to reform a high-resolution imagery of moving targets and extract 3-D target feature through hybrid processing of the data taken by multiple arbitrarily ...
Baokun Liu, Victor C. Chen
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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
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Optimal sensor positioning for ISAR imaging [PDF]

2010 IEEE International Geoscience and Remote Sensing Symposium, 2010
ISAR imaging is a powerful signal processing that allows obtaining images of non-cooperative targets [1, 2]. Such images are often used as input to classification and recognition systems since they contain useful two-dimensional features [3, 4, 5, 6].
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