Results 151 to 160 of about 5,548 (180)

Precision tracking algorithms for ISAR imaging

IEEE Transactions on Aerospace and Electronic Systems, 1996
The simultaneous imaging and tracking of a moving target is one of the most difficult problems in inverse synthetic aperture radar (ISAR) signal processing. The problem is addressed here using a two-antenna imaging radar. The target range shift is sensed with an exponentially averaged envelope correlation algorithm while the angle change is measured ...
Haiqing Wu, G.Y. Delisle
openaire   +2 more sources

ISAR imaging of a small wind turbine

2014 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), 2014
In this work, we carry out the inverse synthetic aperture radar (ISAR) imaging of a wind turbine. ISAR is an established technique for examining the radar signatures of targets in relation to its geometrical features. ISAR imagery can often provide revealing information about the scattering phenomenology and any motion anomalies associated with the ...
Chenchen J. Li, Hao Ling, Shang-Te Yang
openaire   +2 more sources

Airborne ISAR Imaging to Air Target

IET International Radar Conference 2015, 2015
Conventional ground-based ISAR is restrained by the noncooperative motion of targets and has long coherent processing interval (CPI), so its imaging performance is unstable. In this work airborne ISAR imaging technique will be discussed, which can shorten the distance from radar to air target, decrease the CPI, and improve imaging applicability ...
Peiguo Liu, Yi Su, Yutao Zhu
openaire   +2 more sources

In-Situ ISAR Imaging of Wind Turbines

IEEE Transactions on Antennas and Propagation, 2016
Measurement and processing methodologies are developed to capture the in-situ inverse synthetic aperture radar (ISAR) image of an operating wind turbine. In-situ measurement data of a small three-blade wind turbine are collected using an ultrawideband radar, and the measured signatures are compared with simulation results based on physical optics.
Shang-Te Yang, Hao Ling, Chenchen J. Li
openaire   +2 more sources

ISAR imaging of a precession cone target

IET International Radar Conference 2015, 2015
A new method to estimate the precession angle and synthetic aperture angle in ISAR imaging for precession cone target is proposed. The ISAR image is easier to obtain based on precession angle and synthetic aperture angle. In the proposed method, the precession angle is calculated by utilizing HRRP sequence based on the different flight attitudes ...
Yu Zhang Yu Zhang, Zhongling Liu Zhongling Liu, Chao Ning Chao Ning   +2 more
openaire   +2 more sources

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 ...
Mehrdad Soumekh, H. Yang
openaire   +3 more sources

Imaging of space targets in FMCW-ISAR

IET International Radar Conference 2013, 2013
Combining Frequency Modulation Continuous Wave (FMCW) and Inverse Synthetic Aperture Radar (ISAR), FMCW-ISAR is more practical with low cost, low power, small volume for short distance targets. However, the continuous echo signals in FMCW-ISAR system lead to dechirp distortion phenomenon during the process of dechirp for far-distance targets ...
Zenghui Li, Kan Jin, W. Chang, Jun Yang
openaire   +2 more sources

Filtering methods for ISAR image processing

Proceedings of the Second International Symposium of Trans Black Sea Region on Applied Electromagnetism (Cat. No.00TH8519), 2002
Summary form only given. This paper deals with filtering methods and algorithms for processing of images obtained from microwave hologram registered by inverse synthetic aperture radar (ISAR). The following image reconstruction filters and filtering procedure are developed: one dimensional median filter; two dimensional cross form median filter; filter
Andon Lazarov, V.M. Vasilev
openaire   +2 more sources

A new algorithm for the formation of ISAR images

IEEE Transactions on Aerospace and Electronic Systems, 1996
A new technique for implementing the enhanced image processing (EIP) algorithm for the formation of inverse synthetic aperture radar (ISAR) images is presented. The EIP algorithm is required when, during the formation of an image, scattering centers on a target move out of range and/or Doppler resolution cells.
openaire   +2 more sources

Molecular imaging in oncology: Current impact and future directions

Ca-A Cancer Journal for Clinicians, 2022
Martin G Pomper, Steven P Rowe
exaly