Imaging algorithm for bistatic forward-looking SAR based on Chebyshev polynomials

被引：0
|
作者：
Chen Q. [1 ]
Li X.-P. [1 ]
Zhu M.-B. [1 ]
Zou X.-H. [2 ]
Lu Z.-Y. [1 ]
机构：
[1] College of Coast Defence Arm, Naval Aviation University, Yantai
[2] College of Weapons Engineering, Naval University of Engineering, Wuhan
来源：
Kongzhi yu Juece/Control and Decision | 2019年 / 34卷 / 06期
关键词：
Bistatic; Chebyshev polynomials; Equivalent range model; Forward-looking; Imaging algorithm; Principle of stationary phase; SAR;
D O I：
10.13195/j.kzyjc.2017.1400
中图分类号：
学科分类号：
摘要：
The special configuration of the bistatic forward-looking synthetic aperture radar(SAR) brings double square root and high squint angle to its range history, which makes it difficult to focus the echo signal, and puts forward higher requirements to the accuracy of the imaging algorithm. Therefore, a bistatic forward-looking SAR RD imaging method based on Chebyshev polynomials is proposed. Firstly, the geometry model and echo model are built, and the influence caused by separated configuration on determining stationary phase point during two-dimensional spectrum model deriving is indicated. Then, by the introduction of Chebyshev polynomials expansion replacing Taylor series expansion in the traditional imaging algorithm, the equivalent range model and the two-dimensional spectrum model of bistatic forward-looking SAR are derived. Finally, the phase matching functions of the bistatic forward-looking SAR RD imaging algorithm are determined by analysis, and the complete program of the imaging algorithm is given. The simulation results show that the proposed algorithm can significantly decrease the equivalent range error and spectrum expansion error of the bistatic forward-looking SAR, and improve the focus depth and imaging quality effectively © 2019, Editorial Office of Control and Decision. All right reserved.
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页码：1241 / 1246
页数：5
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