Results 181 to 190 of about 3,167 (215)
Some of the next articles are maybe not open access.
Optimal Sensor Positioning for Inverse Synthetic Aperture Radar
IEEE Transactions on Aerospace and Electronic Systems, 2013Noncooperative target recognition (NCTR) is often based on the use of inverse synthetic aperture radar (ISAR) images. Although ISAR systems are also able to provide an image of the target when the target's motions are not known a priori, the interpretation of the obtained image is not straightforward, and therefore, the target recognition becomes less ...
openaire +2 more sources
A system model and inversion for synthetic aperture radar imaging
International Conference on Acoustics, Speech, and Signal Processing, 1992A system model and its corresponding inversion for synthetic aperture radar (SAR) imaging are presented. The system model incorporates the spherical nature of a radar's radiation pattern at far field. The inverse method based on this model performs a spatial Fourier transform (Doppler processing) on the recorded signals with respect to the available ...
openaire +2 more sources
Inverse Synthetic Aperture Radar Imaging Using Frame Theory
IEEE Transactions on Signal Processing, 2012Inverse 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
The resolution capabilities in inverse synthetic aperture radar
1989The resolution attainable by an Inverse Synthetic Aperture Radar system is discussed. The image reconstruction method is based on recovering the target reflectivity function by an inverse Fourier transform of the received signal samples collected for different positions of radar and target.
CORSINI, GIOVANNI, VACCARELLI A.
openaire +3 more sources
Range Doppler and Image Autofocusing for FMCW Inverse Synthetic Aperture Radar
IEEE Transactions on Aerospace and Electronic Systems, 2011Inverse synthetic aperture radar (ISAR) is a well-known technique for obtaining high-resolution radar images. ISAR techniques have been successfully applied in the recent past in combination with pulsed coherent radar. In order to be more appealing to both civilian and military fields, imaging sensors are required to be low cost, low powered, and ...
Elisa Giusti, Marco Martorella
openaire +3 more sources
Autofocusing of (inverse) synthetic aperture radar for motion compensation
Proceedings of the IEEE 1996 National Aerospace and Electronics Conference NAECON 1996, 2002Ground imaging from an airborne synthetic aperture radar (SAR) and conversely aircraft imaging from a ground based radar (ISAR) require the knowledge of the motion of the antenna relative to the target, with an accuracy of a fraction of the wavelength upon a time span of seconds.
H.M.J. Cantalloube, C.E. Nahum
openaire +1 more source
A new autofocus method for inverse synthetic aperture radar
Science in China Series E: Technological Sciences, 1997Motion compensation is a key and difficult step in inverse synthetic aperture radar (ISAR) . The calibration of initial phase errors, which is well known as autofocus, requires very high precision, so it determines the quality of the reconstructed image to a great extent.
Wei Ye, Zheng Bao
openaire +1 more source
Microlocal structure of inverse synthetic aperture radar data
Inverse Problems, 2003The work engaged by the authors was motivated by radar applications. But, although the actual radar systems dwell on electromagnetic waves, and targets cause to interrelate the field components, which gives rise to vector wave equations, the authors consider only one scalar functions \(u(t,x)\) satisfying the equation \[ \Delta u- \{1/c^*(t, x)\}^2 ...
Cheney, Margaret, Borden, Brett
openaire +2 more sources
Three-dimensional inverse synthetic aperture radar
2019This chapter introduces the development of a method for 3D reconstruction of moving targets. This method is based on the use of a dual interferometric ISAR (InISAR) system. The interferometric phases measured from two orthogonal baselines are used to jointly estimate the target's effective rotation vector and the heights of the scattering centres with ...
openaire +1 more source