A method for CLSAR 3-D imaging based on backprojection and beamforming

Ren, Xiaozhen; Yang, Ruliang

doi:10.1109/apsar.2009.5374255

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…First, in order to verify the accuracy of the resolution expression derived in (25) and the effectiveness of the proposed 3-D reconstruction approach, a simulation experiment of point targets is conducted. The simulation setting is shown in Fig.…”

Section: A Experiments Of Resolution Verificationmentioning

confidence: 99%

“…CLSAR provides high range resolution by transmitting wide-band signal as well as high azimuth and elevation resolutions by 2-D synthetic apertures formed by curved flight path. However, the echo data collected with curvilinear flight are sparse on the vertical plane which cannot be focused by conventional approaches [25]. To deal with this problem, several spectral estimation methods including RELAX [26]- [28] and coherent CLEAN [29]- [31] are suggested to extract the 3-D features of targets in small scene.…”

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confidence: 99%

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Three-Dimensional Reconstruction for Single-Channel Curvilinear SAR Based on Azimuth Prefocusing

Jiang,

Tang,

Dong

et al. 2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Unlike the traditional multi-channel synthetic aperture radar (SAR) three-dimensional (3-D) reconstruction technology, the single-channel SAR with two synthetic apertures in the vertical and horizontal planes, realized by curved trajectory, has advantages of requiring less acquisition data, lower device cost, and fewer limitations on trajectories. However, due to the complex aerodynamic configuration and flight characteristics, critical challenges are faced including the mathematical model establishment, signal property analyses and reconstruction approach design. In this paper, to address these issues, a 3-D vector geometry model of curvilinear SAR (CLSAR) system is presented and its properties, including elevation bandwidth and resolution, are studied in detail. Then, a novel 3-D reconstruction approach for single-channel CLSAR system based on azimuth pre-focusing is presented, in which the cylindrical symmetry of SAR system is utilized to provide accurate azimuth information of targets in observing scene. With the assisted azimuths, the scene imaged in vertical plane can be performed, and the 3-D reconstruction of interested targets can be obtained. Numerical results using simulated data demonstrate the effectiveness of the proposed approach.

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Section: A Experiments Of Resolution Verificationmentioning

confidence: 99%

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confidence: 99%