曲线轨迹下前视多通道SAR解模糊成像算法

doi:10.7572/S1000-6893.2019.22745

Abstract

Abstract: The forward-looking Synthetic Aperture Radar (SAR) exists Doppler ambiguity. Under the straight path, since the target is symmetrical about the course, and the fuzzy relationship does not vary with the route, beam forming can be used to perform full-aperture deblurring processing. However, under the curve path, the target position is blurred. The relationship has a vacancy and cannot be fully apogematically deblurred. To solve this problem, this paper analyzes the space-variant characteristics of the target fuzzy relation, and proposes a forward-looking multi-channel SAR anti-fuzzy imaging algorithm based on FBP. First, the sub-aperture is divided. In each sub-aperture, the fuzzy relationship of the target is approximately constant. Each sub-aperture is imaged separately. Then each sub-image is deblurred by beam-forming, and finally the sub-image is merged to obtain the final imaging results. The algorithm effectively solves the influence of the vacancy of the target fuzzy relation under the curve trajectory on ambiguity resolution. The simulation experiments verify the effectiveness of the algorithm.

Key words: forward-looking imaging, Synthetic Aperture Radar (SAR), curve trajectory, Doppler ambiguity relation, sub-aperture, beam-forming

CLC Number:

V243.2
TN95

LU Jingyue, ZHANG Lei, MENG Zhichao, SHENG Jialian. Unambiguous imaging for forward-looking synthetic aperture radar on curve trajectory[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019, 40(7): 322745-322745.

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Unambiguous imaging for forward-looking synthetic aperture radar on curve trajectory

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