Results 241 to 250 of about 5,964,622 (303)

A Sparse Aperture ISAR Imaging and Autofocusing Method Based on Meta-Learning Framework

IEEE Transactions on Antennas and Propagation
The cross-range resolution of inverse synthetic aperture radar (ISAR) images is influenced by undersampled data under the sparse aperture (SA) condition.
Ruize Li, Shuanghui Zhang, Yongxiang Liu, Xiang Li   +3 more
semanticscholar   +1 more source

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
openaire   +2 more sources

An Efficient Sparse Aperture ISAR Imaging Framework for Maneuvering Targets

IEEE Transactions on Antennas and Propagation
Existing inverse synthetic aperture radar (ISAR) imaging methods under sparse aperture (SA) conditions are usually based on the assumption that the target motion is stationary, which limits their performance in practical applications.
Chen Chen, Zhiyong Xu, Sirui Tian
semanticscholar   +1 more source

High-Resolution ISAR Imaging for Maneuvering Targets Based on Iterative Adaptive Processing

IEEE Transactions on Computational Imaging, 2021
Inverse synthetic aperture radar (ISAR) imaging for maneuvering targets undergoing significant angular motions in a high-resolution radar system is a complicated task due to the presence of time-varying Doppler phases, resulting in the substantial ...
Penghui Huang, M. Zhan, Zhiwei Yang, Xingzhao Liu, G. Liao, Zhiling Liu, Wentao Du   +6 more
semanticscholar   +1 more source

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 ...
openaire   +1 more source

An Efficient ISAR Imaging Approach for Highly Maneuvering Targets Based on Subarray Averaging and Image Entropy

IEEE Transactions on Geoscience and Remote Sensing, 2021
Owing to the highly maneuvering character involved in targets, the nonuniform 3-D rotation motions make the assumption that the image projection plane (IPP) is constant during coherent processing interval (CPI) invalid.
Zhijun Yang, Dong Li, Xiaoheng Tan, Hongqing Liu, Le Xu, G. Liao   +5 more
semanticscholar   +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 ...
Victor C. Chen, Marco Martorella
openaire   +2 more sources

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
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.
Omar A. Yeste-Ojeda, Jesus Grajal
openaire   +2 more sources

High-Resolution ISAR Imaging and Motion Compensation With 2-D Joint Sparse Reconstruction

IEEE Transactions on Geoscience and Remote Sensing, 2020
With regard to the multifunction radar transmitting sparse stepped-frequency-modulation (SSFM) signal for inverse synthetic aperture radar (ISAR) imaging, the received echo signal is usually sparse in two dimensions, i.e., sparse stepped-frequency ...
Shuai Shao, Lei Zhang, Hongwei Liu
semanticscholar   +1 more source