Results 131 to 140 of about 6,280 (175)

Motion estimation and compensation in SAR/ISAR imaging

[Proceedings] ICASSP-92: 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, 1992
The authors present a synthetic aperture radar (SAR) coherent system model and inversion (ISAR) to image a target moving with an unknown constant velocity in a stationary background. It is shown that SAR imaging of a moving target can be converted into imaging the target in a stationary squint-mode SAR problem where the parameters of the squint-mode ...
H. Yang, Mehrdad Soumekh
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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
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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
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Simulation of shipborne ISAR imaging

2012 IEEE 11th International Conference on Signal Processing, 2012
Shipborne inverse synthetic aperture radar (ISAR) imaging is in imperious demands with warfare at sea tending to be the key battle field in the future. Simulations of shipborne ISAR imaging are studied when ships are yawing, pitching and rolling are studied.
Fulin Su, Jianjun Gao, Jing Lu
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Optimal sensor positioning for ISAR imaging

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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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 ...
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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.
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Introduction to ISAR Imaging

2014
The aim of this introductory chapter is to cover some fundamental concepts on ISAR and to highlight some characteristics that make these systems unique, especially related to SAR. Although SAR and ISAR share the same underlining concept of forming a synthetic aperture, they are substantially different in the way they process the radar received signal ...
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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.
O.A. Yeste-Ojeda, J. Grajal
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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 ...
Guodong Xu, Jianjun Gao, Fulin Su
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