Results 71 to 80 of about 2,357 (209)

GigaRad – a multi-purpose high-resolution ground-based radar system [PDF]

, 2014
Recently DLR has developed and constructed a new experimental radar instrument for various applications like radar signature collection, SAR/ISAR imaging, motion detection, tracking, etc., where high performance and high flexibility have been the key ...
Anger, Simon, Iff, Sebastian, Jirousek, Matthias, Peichl, Markus   +3 more
core  

Statistical Analysis of Performance of Optimisation‐Based SAR Autofocus

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
Transionospheric SAR autofocus is a variational algorithm designed to overcome the limitations of conventional autofocus methods in correcting ionospheric distortions in spaceborne SAR images. This study provides a systematic statistical analysis of its robustness, examining the effects of turbulence, clutter, and noise on performance.
Patrick Haughey, Mikhail Gilman, Semyon Tsynkov   +2 more
wiley   +1 more source

Pareto‐Optimized Mobile‐Sink Routing for Energy‐Efficient Wireless Sensor Networks

International Journal of Energy Research, Volume 2025, Issue 1, 2025.
Wireless sensor networks (WSNs) are inherently constrained by limited battery resources, making the design of energy‐efficient communication protocols critical for extending network lifetime. Cluster‐based routing, enhanced through optimization algorithms, has emerged as a promising solution to balance energy consumption and improve scalability.
Ayman A. Alharbi, Emad S. Hassan, Idris H. Smaili, Amir Afzal   +3 more
wiley   +1 more source

Three dimensional scattering center imaging techniques [PDF]

Two methods to image scattering centers in 3-D are presented. The first method uses 2-D images generated from Inverse Synthetic Aperture Radar (ISAR) measurements taken by two vertically offset antennas.
Burnside, W. D., Younger, P. R.
core   +1 more source

Improved Scattering Center Extraction From ISAR Data Using Simplex Optimization

International Journal of Antennas and Propagation, Volume 2025, Issue 1, 2025.
Inverse synthetic‐aperture radar (ISAR) techniques have started to play a key role in calculating the radar cross‐section (RCS) values of objects from near‐field measurements. It is assumed that the scene (or the scatterer) is composed of scattering centers (SCs) whose locations and complex amplitudes are found from the ISAR data.
Bahar Ugurdogan, A. Arif Ergin, Andrea Francesco Morabito   +2 more
wiley   +1 more source

3-D High-Resolution ISAR Imaging for Noncooperative Air Targets

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This article uses the inverse synthetic aperture radar (ISAR) imaging method to present real-world tests on 3-D radar imaging of noncooperative air targets. Initially, the fundamentals of 3-D ISAR are introduced.
Marcin Kamil Baczyk, Piotr Samczynski, Jedrzej Drozdowicz, Maciej Wielgo, Jakub Sobolewski, Marek Ciesielski, Jakub Julczyk, Krzysztof Stasiak, Grzegorz Pietrzykowski, Karol Abratkiewicz, Maciej Soszka   +10 more
doaj   +1 more source

Chip-based photonic radar for high-resolution imaging

, 2019
Radar is the only sensor that can realize target imaging at all time and all weather, which would be a key technical enabler for future intelligent society.
Cong, Rong, Cui, Simin Li Zhengze, Feng, Jing, He, Zhengqian, Pan, Shilong, Yang, Yue, Ye, Xingwei, Zhang, Fangzheng, Zhu, Dan   +8 more
core  

Analysis for sparse channel representation based on dictionary learning in massive MIMO systems

IET Communications, Volume 18, Issue 20, Page 1728-1740, December 2024.
We provide a qualitative analytical formula for dictionary sparse representation accuracy and establish an optimal upper bound. Abstract The accuracy analysis of dictionary sparse representation for channels in massive MIMO systems is a relatively unexplored field.
Qing‐Yang Guan
wiley   +1 more source

Research of InISAR imaging based on joint translational compensation

The Journal of Engineering, 2019
In order to solve the problem that conventional inverse synthetic aperture radar three-dimensional (InISAR 3D) imaging methods need too much computation and so many restrictions in image registration step, this study proposes an InISAR 3D imaging ...
Kai Zhang, Yingni Hou, Lin Jin
doaj   +1 more source

Experimental Results of High-Resolution ISAR Imaging of Ground-Moving Vehicles with a Stationary FMCW Rada [PDF]

, 2015
In the paper experimental results of ISAR (Inverse Synthetic Aperture Radar) processing obtained with highresolution radar are presented. Targets under observation were ground moving vehicles, such as cars, trucks and tractors.
Gromek, Artur, Gromek, Damian, Kulpa, Janusz S., Kulpa, Krzysztof, Malanowski, Mateusz, Samczyński, Piotr   +5 more
core   +1 more source