Results 31 to 40 of about 156 (95)

Multi-Layer Overlapped Subaperture Algorithm for Extremely-High-Squint High-Resolution Wide-Swath SAR Imaging with Continuously Time-Varying Radar Parameters

Remote Sensing, 2022
Extremely-high-squint (EHS) geometry of the traditional constant-parameter synthetic aperture radar (SAR) induces non-orthogonal wavenumber spectrum and hence the distortion of point spread function (PSF) in focused images.
Yan Wang, Rui Min, Zegang Ding, Tao Zeng, Linghao Li   +4 more
doaj   +1 more source

A Novel Compressive Sensing-Based Multichannel HRWS SAR Imaging Technique for Moving Targets

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
When high-resolution wide-swath (HRWS) multichannel synthetic aperture radar (MC-SAR) system is used for ocean observation, vast amount of redundant data is generated, significantly limiting its applications.
Shaojie Li, Shaohui Mei, Shuangxi Zhang, Shuai Wan, Tao Jia   +4 more
doaj   +1 more source

A Joint Azimuth Multichannel Cancellation (JAMC) Antibarrage Jamming Scheme for Spaceborne SAR

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
The azimuth multichannel synthetic aperture radar (SAR) increases the swath width by reducing the pulse repetition frequency (PRF), thus providing an effective scheme for realizing high-resolution and wide-swath (HRWS) imaging simultaneously.
Shuohan Cheng, Xilong Sun, Yonghua Cai, Huifang Zheng, Weidong Yu, Yanyan Zhang, Sheng Chang   +6 more
doaj   +1 more source

MIMO SAR Imaging for Wide‐Swath Based on Compressed Sensing

Mathematical Problems in Engineering, Volume 2017, Issue 1, 2017., 2017
To reduce the amount of data to be stored and software/hardware complexity and suppress range ambiguity, a novel MIMO SAR imaging based on compressed sensing is proposed under the condition of wide‐swath imaging. Random phase orthogonal waveform (RPOW) is designed for MIMO SAR based on compressed sensing (CS).
Feng Liu, Shanxiang Mu, Wanghan Lv, Raffaele Solimene   +3 more
wiley   +1 more source

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

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

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

A Novel Sub-Image Local Area Minimum Entropy Reconstruction Method for HRWS SAR Adaptive Unambiguous Imaging

Remote Sensing, 2021
Multichannel high-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) is a vital technique for modern remote sensing. As multichannel SAR systems usually face the problem of azimuth nonuniform sampling resulting in azimuth ambiguity, the ...
Liming Zhou, Xiaoling Zhang, Xu Zhan, Liming Pu, Tianwen Zhang, Jun Shi, Shunjun Wei   +6 more
doaj   +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