scholarly journals ωk algorithm for multi-receiver synthetic aperture sonar based on exact analytical two-dimensional spectrum

2019 ◽  
Vol 2019 (20) ◽  
pp. 7210-7214
Author(s):  
Jinbo Wang ◽  
Jinsong Tang ◽  
Zhen Tian
Keyword(s):  
Synthetic Aperture ◽  
Two Dimensional ◽  
Synthetic Aperture Sonar ◽  
Dimensional Spectrum

scholarly journals Focusing of Ultrahigh Resolution Spaceborne Spotlight SAR on Curved Orbit

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 628 ◽  
Author(s):  
Yulei Qian ◽  
Daiyin Zhu
Keyword(s):  
Synthetic Aperture ◽  
Two Dimensional ◽  
Sar Images ◽  
Ultrahigh Resolution ◽  
Orbital State ◽  
Dimensional Spectrum ◽  
Polynomial Expression ◽  
Range Migration ◽  
Value Decomposition ◽  
Azimuth Resolution

Aiming to acquire ultrahigh resolution images, algorithms for spaceborne spotlight synthetic aperture radar (SAR) imaging typically confront challenges of curved orbit and azimuth spectral aliasing. In order to conquer these difficulties, a method is proposed in this paper to obtain ultrahigh resolution spaceborne SAR images on a curved orbit, which is composed of the modified RMA (Range Migration Algorithm) and the modified deramping-based approach. The modified RMA is developed to deal with the effect introduced by a curved orbit and the modified deramping-based approach is utilized to handle the problem of azimuth spectral aliasing. In the modified RMA, the polynomial expression of SAR two-dimensional spectrum on a curved orbit is derived with fourth-order azimuth phase history model and series reversion. Then, the singular value decomposition (SVD) is applied to decompose the expression of SAR two-dimensional spectrum numerically in order to acquire coordinates for Stolt interpolation in the scenario of curved orbit. In addition, the modified deramping-based approach is derived by introducing orbital state vectors in order to accommodate the situation of curved orbit in the proposed method. Experiments are implemented on point target simulation in order to verify the effectiveness of the presented method. In experiments, the range and azimuth resolution can achieve 0.15 m and 0.14 m, with focused scene size of 3 km by 3 km.

Bistatic Synthetic Aperture Sonar Measurements and Preliminary Analysis

2006 ◽  
Author(s):  
Steven G. Kargl ◽  
Kevin L. Williams ◽  
Eric L. Thoros ◽  
Joseph L. Lopes
Keyword(s):  
Preliminary Analysis ◽  
Synthetic Aperture ◽  
Synthetic Aperture Sonar

Synthetic Aperture Sonar Primer

1997 ◽  
Author(s):  
Frank Henyey ◽  
Kevin Williams
Keyword(s):  
Synthetic Aperture ◽  
Synthetic Aperture Sonar

scholarly journals CZT Algorithm for Multiple-Receiver Synthetic Aperture Sonar

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 1902-1909
Author(s):  
Mengbo Ma ◽  
Jinsong Tang ◽  
Heping Zhong
Keyword(s):  
Synthetic Aperture ◽  
Synthetic Aperture Sonar ◽  
Multiple Receiver
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