A real-time unified focusing algorithm (RT-UFA) for multi-mode SAR via azimuth sub-aperture complex-valued image combining and scaling

GC Sun, Y Liu, M Xing, S Wang, J Yang… - … on Geoscience and …, 2021 - ieeexplore.ieee.org
Spaceborne synthetic aperture radar (SAR) can operate at various modes, including
stripmap mode, spotlight mode, sliding spotlight mode, and Terrain observation by …

Focusing of Wide Swath Range Sweep SAR With Extended Wide Nonlinear Chirp Scaling Algorithm

K Lv, M Liu, G Li - IEEE Transactions on Geoscience and …, 2023 - ieeexplore.ieee.org
Multichannel, Digital beamforming (DBF)-based high-resolution wide-swath synthetic
aperture radar (HRWS-SAR) is dedicated to acquiring large observation width and high …

Optronic high-resolution sar processing with the capability of full-resolution imaging

L Liu, Y Gao, X Liu - IGARSS 2018-2018 IEEE International …, 2018 - ieeexplore.ieee.org
The improvement of synthetic aperture radar (SAR) resolution brings a broader applications
but poses a great burden for SAR data processor. Real-time processing becomes a difficulty …

An efficient approach with scaling factors for TOPS-mode SAR data focusing

W Xu, P Huang, Y Deng, J Sun… - IEEE Geoscience and …, 2011 - ieeexplore.ieee.org
The Terrain Observation by Progressive Scans (TOPS) mode is a novel spaceborne imaging
mode which can be used to obtain wide-swath coverage and overcome major drawbacks in …

Time-domain autofocus for ultrahigh resolution SAR based on azimuth scaling transformation

H Lin, J Chen, M Xing, X Chen, N Li… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
For ultrahigh resolution synthetic aperture radar (SAR), azimuth spectrum aliasing limits the
application of frequency-domain autofocus algorithms. Therefore, time-domain autofocus …

Interpolation free wide nonlinear chirp scaling algorithm for spaceborne stripmap range sweep SAR imaging

Y Wang, Z Ding, T Zeng, T Long - IEEE Geoscience and …, 2019 - ieeexplore.ieee.org
The spaceborne stripmap range sweep synthetic aperture radar (SAR)(SS-RSSAR) is a new-
concept SAR mode proposed to efficiently image regions of interest (ROI) squinted with …

Full-aperture SAR data focusing in the spaceborne squinted sliding-spotlight mode

W Xu, Y Deng, P Huang, R Wang - IEEE Transactions on …, 2013 - ieeexplore.ieee.org
This paper analyzes the signal properties of spaceborne squinted sliding-spotlight synthetic
aperture radar (SAR). Both the squint angle and the azimuth beam steering during the whole …

A novel imaging algorithm for focusing high-resolution spaceborne SAR data in squinted sliding-spotlight mode

J Chen, H Kuang, W Yang, W Liu… - IEEE Geoscience and …, 2016 - ieeexplore.ieee.org
To process squinted sliding-spotlight synthetic aperture radar data, the azimuth
preprocessing step based on the linear range walk correction (LRWC) and derotation …

A Hybrid Chirp Scaling Algorithm for Squint Sliding Spotlight SAR Data Imaging

Y Guo, P Wang, Z Men, T He… - IEEE Geoscience and …, 2024 - ieeexplore.ieee.org
Squint spaceborne synthetic aperture radar (SAR) can significantly improve the ground
observation performance of platform sensor through flexible beam pointing; however, it is …

2-D Wavenumber-Domain Autofocusing for High-Resolution Highly-Squinted SAR Imaging Based on Equivalent Broadside Model

Y Deng, GC Sun, L Han, Y Wang… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
The wavenumber domain algorithm is an ideal solution for high-resolution and highly
squinted (HRHS) synthetic aperture radar (SAR) imaging in the case of an ideal straight …