Remote Sens. 2019, 11(3), 346; https://doi.org/10.3390/rs11030346
Modeling and Precise Processing for Spaceborne Transmitter/Missile-Borne Receiver SAR Signals
1
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
2
College of Communication and Information Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
*
Authors to whom correspondence should be addressed.
Received: 14 January 2019 / Revised: 28 January 2019 / Accepted: 5 February 2019 / Published: 10 February 2019
(This article belongs to the Special Issue Novel Bistatic SAR Scattering Theory, Imaging Algorithms, and Applications)
Abstract
The spaceborne transmitter/missile-borne receiver (ST/MR) synthetic aperture radar (SAR) could provide several unique advantages, such as wide coverage, unrestricted geography, a small detection probability of the missile, and forward-looking imaging. However, it is also accompanied by problems in imaging, including geometric model establishment and focusing algorithm design. In this paper, an ST/MR SAR model is first presented and then the flight-path constraint, characterized by geometric configurations, is derived. Considering the impacts brought about by the maneuvers of the missile, a non-‘Stop-Go’ mathematical model is devised and it can avoid the large errors introduced by the acceleration, which is neglected in the traditional model. Finally, a two-dimensional (2-D) scaling algorithm is developed to focus the ST/MR data. Without introducing any extra operations, it can greatly remove the spatial variations of the range, azimuth, and cross-coupling phases simultaneously and entirely in the 2-D hybrid domain. Simulation results verify the effectiveness of the proposed model and focusing approach. View Full-TextKeywords:
spaceborne transmitter/missile-borne receiver (ST/MR); synthetic aperture radar (SAR); two-dimensional (2-D) scaling algorithm; cross-coupling; spatial variation
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Tang, S.; Guo, P.; Zhang, L.; Lin, C. Modeling and Precise Processing for Spaceborne Transmitter/Missile-Borne Receiver SAR Signals. Remote Sens. 2019, 11, 346.
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