Results 91 to 100 of about 12,852 (148)

Broadband, Wide‐Angle, and Versatile Metasurface Illusions with Inverse Synthetic Aperture Radar Imaging

open access: yesAdvanced Science
Generation of controllable illusions has raised widespread interest. Over the past few decades, this field has been revolutionized by the emergence of metamaterials and metasurfaces.
Haoran Li   +12 more
doaj   +1 more source

Photonic signal processing for inverse synthetic aperture radar imaging.

open access: yes, 1998
A robust signal processor, capable of handling a multitude of signal processing functions over a wide instantaneous signal bandwidth is needed for future military systems where shared sensor and signal processing resources will be employed. We investigated a novel 2D acousto-optic (AO) processor capable of real-time multifunction signal processing.
Riza, Nabeel A., Pape, Dennis R.
openaire   +2 more sources

Bayesian Inverse Synthetic Aperture Radar Imaging

IEEE Geoscience and Remote Sensing Letters, 2011
In this letter, a novel algorithm of inverse synthetic aperture radar (ISAR) imaging based on Bayesian estimation is proposed, wherein the ISAR imaging joint with phase adjustment is mathematically transferred into signal reconstruction via maximum a posteriori estimation.
Gang Xu   +4 more
openaire   +1 more source

Bistatic inverse synthetic aperture radar imaging

IEEE International Radar Conference, 2005., 2005
The use of a monostatic radar configuration limits the ability of an inverse synthetic aperture radar (ISAR) system to image targets in certain geometries. By employing bistatic geometries this limitation may be overcome. Bistatic radar systems will pay a great role in the coming decade since a large number of radar missions are being foreseen.
null Zhenbo Zhu   +2 more
openaire   +1 more source

Inverse synthetic aperture 3-D imaging laser radar

2010 2nd International Conference on Signal Processing Systems, 2010
Three-dimensional (3-D) Image can represent target's physical characteristic well and improve target recognition capability, however, conventional optical imaging radar which is limited by the array units or scan system cannot realize the high resolution imaging for moving targets.
Jin He   +3 more
openaire   +1 more source

Inverse Synthetic Aperture Radar Imaging Using Frame Theory

IEEE Transactions on Signal Processing, 2012
Inverse synthetic aperture radar (ISAR) imaging is conventionally addressed by means of fast Fourier transform (FFT) method. In this paper, a frame processing method derived based on frame theory for ISAR imaging is proposed as an alternative to FFT based approaches.
Ya Jing Huang   +3 more
openaire   +1 more source

Inversion of Synthetic Aperture Radar. Ocean Image Spectra

[Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium, 2005
An algorithm that inverts SAR Ocean image spectra into long gravity Ocean wavenumber spectra is implemented and applied to both airborne (CCRS CV-580) and spaceborne (ERS-1) c-band SAR data. The nonlinear iterative algorithm is based on a generalized version of Hasselmann's forward spectral transform that also incorporates the range bunching effect ...
G. Engen, H. Johnsen, H.E. Krogstad
openaire   +1 more source

Inverse synthetic aperture radar imaging exploiting dictionary learning

2018 IEEE Radar Conference (RadarConf18), 2018
We consider the Inverse synthetic aperture radar (ISAR) imaging with under-sampled data in the framework of compressive sensing (CS) theory. In the existing studies of CS based ISAR imaging or sparse ISAR imaging, the scene to be imaged is simply assumed to be sparse or existing transforms, such as the wavelet transform, etc.
Changyu Hu, Ling Wang, Otmar Loffeld
openaire   +1 more source

New approach to inverse synthetic aperture radar imaging

Annual Meeting Optical Society of America, 1987
Inverse synthetic aperture radar (ISAR) imaging is an extension of synthetic aperture radar (SAR) imaging to cases where the synthetic aperture is produced by target motion (trajectory), as opposed to radar motion, and hence unknown a priori. In SAR knowledge of the motion is used to produce the image; lack of this knowledge causes the ISAR imaging ...
Scott Hudson, Demetri Psaltis
openaire   +1 more source

Inverse Synthetic Aperture Radar imaging at 580 GHz

2008 33rd International Conference on Infrared, Millimeter and Terahertz Waves, 2008
We have demonstrated sub-centimeter resolution inverse synthetic aperture radar (ISAR) imaging using a 580 GHz, frequency modulated continuous wave (FMCW) radar. This ISAR technique uses pulse compression possible with the FMCW waveform to achieve resolution in range, and exploits rotation of the target to achieve resolution in cross-range.
J. A. Trischman   +6 more
openaire   +1 more source

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