Paper Info
Title
A Novel Hypersonic Vehicle-Borne Multichannel Sar-Gmti Scheme Based On Adaptive Sum And Difference Beams Within Eigenspace
Abstract
This paper investigates a novel ground moving target indication (GMTI) scheme for a hypersonic vehicle-borne multichannel synthetic aperture radar (MC-SAR) system with Doppler ambiguity. First, after the range compression and azimuth chirp Fourier transform (CFT), by applying the eigenspace-based adap-tive sum and difference beams (EASDB) on the coarse-focused images, the high-precision cross-track ve -locity (CTV) can be retrieved. Then, utilizing the high-precision CTV to construct an accurate moving target steering vector to extract the moving target energy. With the proposed CFT-two-step method, we have avoided cumbersome CTV search, and simplified the process of range walk correction, resulting in lower computational complexity. Compared to the CFT-center and CFT-two-step methods, the proposed scheme obtains the accurate two-dimension motion parameters of a moving target, and has better perfor-mance and robustness in the detection, focusing, and location, preserving the moving target envelope and achieving higher signal-to-clutter-and-noise ratio (SCNR). Finally, using the processing results of simula-tion and real measured MC-SAR data, we verify the effectiveness and feasibility of our proposed scheme.(c) 2021 Elsevier B.V. All rights reserved.
Year
DOI
Venue
2021
10.1016/j.sigpro.2021.108168
SIGNAL PROCESSING
Keywords
DocType
Volume
Clutter suppression, Ground moving target indication (GMTI), Hypersonic vehicle (HSV), Motion parameter estimation, Sum and difference beams, Synthetic aperture radar (SAR)
Journal
187
ISSN
Citations 
PageRank 
0165-1684
1
0.36
References 
Authors
0
5
Name
Order
Citations
PageRank
Jiusheng Han121.06
Yunhe Cao232.09
Tat-Soon Yeo320.72
Fengfei Wang422.41
Shuai Liu5110.80