Results 41 to 50 of about 17,640,035 (138)

Spaceborne HRWS-SAR-GMTI System Design Method with Optimal Configuration

Remote Sensing
The spaceborne high-resolution and wide-swath synthetic aperture radar (HRWS-SAR) system combined with the ground moving target indication (GMTI) mode provides a promising prospect in the realization of wide-area target surveying and high-resolution ...
Yan Jiang, Lingyu Wang, Qing Ling, Jingtao Ma, Penghui Huang, Xingzhao Liu, Jixia Fan   +6 more
doaj   +1 more source

Investigation on Beamspace Multiple‐Input Multiple‐Output Synthetic Aperture Radar Data Imaging

International Journal of Antennas and Propagation, Volume 2016, Issue 1, 2016., 2016
The multiple‐input multiple‐output (MIMO) technique can improve the high‐resolution wide‐swath imaging capacity of synthetic aperture radar (SAR) systems. Beamspace MIMO‐SAR utilizes multiple subpulses transmitted with different time delays by different transmit beams to obtain more spatial diversities based on the relationship between the time delay ...
Hongbo Mo, Wei Xu, Zhimin Zeng, Angelo Liseno   +3 more
wiley   +1 more source

Multidimensional Radar Waveforms: A New Paradigm for the Design and Operation of Highly Performant Spaceborne Synthetic Aperture Radar Systems [PDF]

, 2007
This paper introduces and analyses the innovative paradigm of multidimensional waveform encoding for spaceborne synthetic aperture radar (SAR). The combination of this technique with digital beamforming on receive enables a new class of highly ...
Alberto Moreira, Moreira, Alberto, Nicolas Gebert, Gebert, Nicolas, Krieger, Gerhard, Gerhard Krieger   +5 more
core   +1 more source

MIMO SAR Using Orthogonal Coding: Design, Performance Analysis, and Verifications

International Journal of Antennas and Propagation, Volume 2015, Issue 1, 2015., 2015
Multiple‐input multiple‐output (MIMO) synthetic aperture radar (SAR) is a promising technology in radar imaging which provides a better balance of azimuth resolution and swath width compared with traditional single‐input single‐output (SISO) SAR. It has the potential to help scientists and engineers to design ambitious SAR system with higher resolution
Yueguan Lin, Yida Fan, Chenglong Jiang, Zhiqiang Wang, Weizeng Shao, Giuseppe Mazzarella   +5 more
wiley   +1 more source

Advanced Synthetic Aperture Radar Based on Digital Beamforming and Waveform Diversity [PDF]

, 2008
This paper introduces innovative SAR system concepts for the acquisition of high resolution radar images with wide swath coverage from spaceborne platforms.
Alberto Moreira, Moreira, Alberto, Nicolas Gebert, Younis, Marwan, Gebert, Nicolas, Krieger, Gerhard, Gerhard Krieger, Marwan Younis   +7 more
core   +1 more source

An Efficient Signal Reconstruction Algorithm for Stepped Frequency MIMO‐SAR in the Spotlight and Sliding Spotlight Modes

International Journal of Antennas and Propagation, Volume 2014, Issue 1, 2014., 2014
Multiple‐input multiple‐output (MIMO) synthetic aperture radar (SAR) using stepped frequency (SF) waveforms enables a high two‐dimensional (2D) resolution with wider imaging swath at relatively low cost. However, only the stripmap mode has been discussed for SF MIMO‐SAR.
Jiajia Zhang, Guangcai Sun, Mengdao Xing, Zheng Bao, Fang Zhou, Mathini Sellathurai   +5 more
wiley   +1 more source

Channel Phase Error Compensation for MIMO‐SAR

International Journal of Antennas and Propagation, Volume 2014, Issue 1, 2014., 2014
Multi‐input multioutput (MIMO) is a novel technique to achieve high‐resolution as well as wide swath in synthetic aperture radar (SAR) systems. Channel imbalance is inevitable in multichannel systems that it declines the imaging quality. Generally, the imbalance cannot be fully compensated by simple internal calibration in a MIMO‐SAR system.
Lei Zhang, Yunkai Deng, Robert Wang, Wen-Qin Wang   +3 more
wiley   +1 more source

Observation and Coordination Needs for Current, Near‐Future, and Next Generation Earth‐Observing SAR Systems

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract This paper summarizes an evaluation by experts of how coordination of Earth‐observing Synthetic Aperture Radar (SAR) missions among the world's space agencies could advance toward game‐changing scientific discoveries and fully realizing SAR's practical capability to address many issues facing society.
Cathleen E. Jones, Ake Rosenqvist, Björn Rommen, Magdalena Fitrzyk, Eric Rignot, Bernd Scheuchl, Yujie Zheng, Andrew Hooper, Mark Simons, Tomokazu Kobayashi, Paul Siqueira, Maurizio Santoro, Takeo Tadono, Laura Hess, Heather McNairn, Laura Frulla, Malin Johansson, Wolfgang Dierking, Line Rouyet, Annett Bartsch, Paco Lopez Dekker, Johnny A. Johannessen   +21 more
wiley   +1 more source

Signal Processing for Digital Beamforming FMCW SAR

Mathematical Problems in Engineering, Volume 2014, Issue 1, 2014., 2014
According to the limitations of single channel Frequency Modulation Continuous Wave (FMCW) Synthetic Aperture Radar (SAR), Digital Beamforming (DBF) technology is introduced to improve system performance. Combined with multiple receive apertures, DBF FMCW SAR can obtain high resolution in low pulse repetition frequency, which can increase the ...
Qin Xin, Zhihong Jiang, Pu Cheng, Mi He, Gianluca Ranzi   +4 more
wiley   +1 more source

Treating the innocent victims of trolleys and war

Bioethics, Volume 39, Issue 1, Page 18-25, January 2025.
Abstract Both trolleys and war leave innocent victims to suffer death and injury. Trolley problems accounting for the injured, and not only the dead, tease out intuitions about liability that enhance our understanding of the obligation to provide compensation and medical care to civilian victims of war.
Michael L. Gross
wiley   +1 more source