Results 31 to 40 of about 2,220,668 (92)

Two‐dimensional deceptive jamming mitigation algorithm for SAR imaging using frequency diverse array

The Journal of Engineering, Volume 2019, Issue 21, Page 8022-8026, November 2019., 2019
The synthetic aperture radar (SAR) may be threatened greatly by the deceptive jamming within its main‐lobe. To tackle this problem, a two‐dimensional self‐adaptive frequency diverse array (FDA)‐based SAR processing scheme is proposed in this study. Considering that transmit and receive steering vectors of FDA are range‐angle dependent, in FDA‐SAR, the ...
Chenchen Lin, Puming Huang, Yu Li, Weiwei Wang   +3 more
wiley   +1 more source

Probability of Firn Aquifer Presence in Antarctica by Combining Remote Sensing and Regional Climate Model Data

Geophysical Research Letters, Volume 51, Issue 15, 16 August 2024.
Abstract Despite in‐situ observations of perennial firn aquifers (PFAs) at specific locations of the Antarctic ice sheet, a comprehensive continent‐wide mapping of PFA distribution is currently lacking. We present an estimate of their distribution across Antarctica in the form of a probability assessment using a Monte Carlo technique.
V. Di Biase, P. Kuipers Munneke, S. B. M. Veldhuijsen, S. de Roda Husman, M. R. van den Broeke, B. Noël, L. G. Buth, B. Wouters   +7 more
wiley   +1 more source

Radar HRRP recognition based on CNN

The Journal of Engineering, Volume 2019, Issue 21, Page 7766-7769, November 2019., 2019
In this study, ground target recognition based on one‐dimensional convolutional neural network (CNN) is studied by exploiting the targets’ high‐resolution range profiles (HRRPs). Contrary to conventional methods which need feature extraction artificially, CNN can automatically discover features for classification.
Jia Song, Yanhua Wang, Wei Chen, Yang Li, Junfu Wang   +4 more
wiley   +1 more source

Digital Beamforming and MIMO SAR: Review and New Concepts [PDF]

, 2012
Spaceborne Synthetic Aperture Radar (SAR) is a unique tool for large scale Earth observation, but the current generation of SAR sensors suffers from some fundamental limitations with regard to their imaging and mapping capabilities.
Villano, Michelangelo, Patyuchenko, Anton, Laskowski, Piotr, Huber, Sigurd, Bordoni, Federica, Moreira, Alberto, Younis, Marwan, Krieger, Gerhard, Kim, Junghyo, Rommel, Tobias, Lopez-Dekker, Paco   +10 more
core  

A Low‐Cost Wideband Digital Array Antenna Based on Stretch Processing Technique

International Journal of Antennas and Propagation, Volume 2024, Issue 1, 2024.
Wideband digital phased array radar offers the advantages of high range resolution, which improves the recognition ability for multiple targets, group targets, and high‐speed targets. Traditional wideband phased arrays use true time delay to compensate for aperture fill time; however, the cost increases significantly.
Daqun Yu, Zhangcheng Hao, Lei Yang, Yang Wang, Lei Sun, Jianjun Mao, Trushit Upadhyaya   +6 more
wiley   +1 more source

FPGA‐based reconfigurable matrix inversion implementation for inverse filtering of multi‐channel SAR imaging

The Journal of Engineering, Volume 2019, Issue 21, Page 8027-8031, November 2019., 2019
In multi‐channel synthetic aperture radar (SAR), the azimuth non‐uniform sampling tends to result in a large number of virtual point targets, which are not expected. Inverse filter algorithm provides a new idea for solving this problem. This way can be abstracted as a matrix inversion in essence, which becomes the key factor that affects the real‐time ...
HuiXing Li, YangKai Feng, ShanQing Hu, BingYi Li, YiZhuang Xie, MengChao Wu   +5 more
wiley   +1 more source

Experimental Performance Investigation of Digital Beamforming on Synthetic Aperture Radar [PDF]

, 2008
In this paper, we present the experimental results of a Digital Beam Forming (DBF) Synthetic Aperture Radar (SAR) performance on the purpose of the High- Resolution Wide-Swath (HRWS) SAR concept.
Junghyo Kim, Younis, Marwan, Wiesbeck, Werner, Werner Wiesbeck, Kim, Junghyo, Marwan Younis   +5 more
core   +1 more source

Imaging algorithm for multi‐channel scan synthetic aperture radar with channel error estimation and compensation

The Journal of Engineering, Volume 2019, Issue 20, Page 6688-6691, October 2019., 2019
The wide swath synthetic aperture radar (SAR) imaging with a fine resolution is fundamentally a contradiction in conventional SAR imaging. To meet the demand of high‐resolution width swath (HRWS) imaging, multi‐channel scan mode has received a great deal of attention as a promising concept to realise HRWS observation. In this article, based on extended
Feng Xiao, Zegang Ding, Meng Ke
wiley   +1 more source

Calibration Issue in SMART Synthetic Aperture Radar Based on Scan-On-Receive [PDF]

, 2009
A new spaceborne Synthetic Aperture Radar (SAR) system based on SCan-On-REceive (SCORE) algorithm has been recently proposed in order to overcome the trade-off between spatial resolution and swath wide of current SAR systems. The compound architecture of
Bordoni, Federica, Younis, Marwan, Krieger, Gerhard   +2 more
core  

High Precision Antenna Characterisation for Broadband Synthetic Aperture Radar Processing [PDF]

, 2014
The airborne F-SAR sensor\cite{fsar}, developed and operated by the DLR-HR institute, acquires very high resolution, fully polarimetric synthetic aperture radar (SAR) data in multiple frequency bands in addition to providing a number of ...
Bernd Gabler, Gabler, Bernd, Jäger, Marc, Andreas Reigber, Reigber, Andreas, Marc Jager   +5 more
core   +1 more source